Pattern Generating System

This invention relates to a system for generating pattern information for a knitting or a weaving machine for producing a Jacquard pattern.

Lately, techniques for automatically producing patterns of knit or woven wares have greatly advanced, as exemplified by a Jacquard knitting machine called "SYSTEMKNIT", which is a computerized machine developed by the Fibrous High Molecular Material Laboratory of the Ministry of International Trade and Industry of Japan. To operate the Jacquard knitting machine, it is necessary to feed pattern information to the machine. The nature of the pattern information varies depending on the type of the knitting machine, i.e., a machine having a mechanical pattern control device or a machine having an electronic pattern control device, so that signals which are adapted for the specific pattern control device are formulated directly or indirectly by suitable processes. Generally speaking, the pattern information is derived from a design developed by an artist, by using a pattern analyzing device.

With a conventional pattern analyzing device, a paper carrying a pattern (design) to be analyzed is wound on a rotary drum, and the paper is optically and electrically scanned while mechanically rotating the drum, for generating sequential electric signals corresponding to the colour (red, green, or blue) of each of the picture elements in the design. The electric signals thus generated are converted into digital signals, for providing information, e.g., in the form of punched tape.

The conventional pattern analyzing device, however, has a shortcoming in that its operation is rather complicated, because rotation of the drum is involved, and because it requires a considerably long time and a large amount of labor to complete the analysis of a pattern due to the need for a long analyzing time.

The intent of the present invention is to mitigate the above-mentioned shortcomings of the conventional techniques. An object of the present invention is to provide a pattern analyzing system which quickly measures the design of a pattern being analyzed, so as to give accurate pattern information.

To fulfill the aforesaid object, the fundamental characteristics of the present invention are that a patterned objective being analyzed is scanned by a television camera which is widely used in the television industry on commercial basis, so as to convert the design into electric analog signals, and the analog signals are electrically analyzed for determining the color of each picture element, whereby digital pattern information is generated as an output on the basis of the color thus determined. A monochromatic (black and white) television camera is used for the aforesaid scanning, and the color of each picture element is determined based on its picture signal level (corresponding to the luminance of each picture element of the design). It is one of the characteristics of the present invention to analyze the color by using monochromatic picture signals. The color of each picture element thus analyzed is stored in a memory (e.g., an IC memory) in the form of digital signals, and after being suitably processed therein, the stored information is delivered to an output medium.

As a feature of the present invention, an optical color filter can be disposed in front of the television camera, so as to emphasize the difference in colors of the different picture elements of the design, by using the level differences in the picture luminance signals.

Another feature of the pattern analyzing system according to the present invention is to use a monochromatic cathode ray tube and a color cathode ray tube for monitoring the picture signals, as generated by the television camera, and monitoring the pattern stored in the memory, in the course of the pattern analysis.

The foregoing and other objects, features, and attendant advantages of the present invention will be appreciated as the same become better understood by the accompanying drawings wherein:

FIG. 1 is a block diagram of a pattern analyzing system according to the present invention;

FIG. 2 is a schematic diagram showing the operation of a memory and its peripheral circuits;

FIG. 3 is a diagram showing a pattern grid;

FIG. 4 is a schematic diagram showing mask action and shift action;

FIG. 5 shows a dot pattern for amendment;

FIG. 6 is a diagram illustrating filter action;

FIG. 7 is a circuit diagram of the unit for amendment operation in the pattern analyzing system of FIG. 1;

FIG. 8 is an arrangement of the operation board of the pattern analyzing system of FIG. 2;

FIG. 9 is a block diagram of the second embodiment of the pattern analyzing system according to the present invention;

FIG. 10 is a schematic diagram showing the operation of a luminance level divider;

FIG. 11 is chrominance diagram (I-Q graph);

FIG. 12 is an example of the color identifying circuit 41 in the pattern analyzing system of FIG. 9, and;

FIG. 13 is an example of a color specifying matrix circuit 42 in the pattern analyzing system of FIG. 9.

The invention will now be described in detail, by referring to the accompanying drawings. The invention may be also applicable to a weaving machine without alternating essential parts thereof, but in the explanation, only a case applied to a knitting machine is described for simplicity. FIG. 1 illustrates a simplified block diagram of a pattern analyzing system according to the present invention. An objective 1 with a pattern being analyzed is scanned by a television camera 3. The objective 1 is either a planar design or a three-dimensional design. The television camera 3 includes a lens system and an electric camera tube, such as a vidicon or an image orthicon, and it is a monochromatic television camera. If necessary, a color filter 2 may be disposed in front of the lens system of the television camera 3. The television camera 3 electronically scans the image of the objective being analyzed, and the picture signals produced by the scanning are delivered to its output, together with horizontal synchronizing signals and vertical synchronizing signals. The output signals are applied to the input of three comparators 7a, 7b, and 7c, through a communication control unit 4, a level adjusting unit 5, and an amplifier 6. The communication control unit applies the synchronizing signals to monitor cathode ray tubes 22 and 23. The level adjusting unit 5 adjusts the white and black levels of the picture signals, in response to the actuation of two adjusting knobs W and B.

The comparators 7a, 7b, and 7c have reference levels H, M and L (it is assumed that H > M > L > O), respectively, so that the levels of the input picture signals are compared with the reference levels. Thus, when the input picture signal level is equal to or exceeds the reference level H, the comparator 7a generates its output; when the input picture signal level is equal to the reference level M or larger than the level M but smaller than the level H, the comparator 7b generates its output, and; when the input picture signal level is equal to the reference level L or larger than the level L but smaller than the level M, the comparator 7c generates its output. The values of the reference levels H, M and L can be adjusted by actuating the corresponding knobs, respectively. A code converter 8 acts to convert the comparator output signals into two bit digital signals. For instance, when the comparator 7a has its output, the output from the code converter 8 is "11"; when the comparator 7b has its output, the output from the code converter 8 is "10"; when the comparator 7c has its output, the output from the code converter 8 is "01" and; when none of the three comparators has an output, the output from the code converter 8 is "00". The four kinds of the output signals from the code converter 8 directly relate to the levels of the picture signals, and in the case of the pattern analyzing system for the knitting machine according to the present invention, the aforesaid four kinds of the code converter output signals indirectly relate to the colors of the picture elements, because the picture signal levels are determined based on the picture element colors. The output from the code converter 8 is successively stored in a random access memory 10 through a buffer register 9. The memory 10 can be any digital memory which is accessible at random, and the illustrated embodiment uses an integrated circuit (IC) memory. To operate the memory 10, the address control 11 specifies the address therein. With the illustrated embodiment, the memory 10 comprises 2 stacks of 9,500 word IC memories, each word having 8 bits. Thus, sixteen bits can be simultaneously written in or read out at a time. Accordingly, the output signals from the code converter 8 (which has two bits per picture element) for eight picture elements are accumulated in the buffer register 9, and a sixteen bit group is stored in the memory as a unit.

The memory 10 and its peripheral circuits will now be described by referring to FIG. 2. FIG. 2(A) shows a part of the output from the amplifier 6. As is apparent from the figure, the signal from the amplifier includes periodical horizontal synchronizing signals 24 and picture signals 25. Although vertical synchronizing signals are included in the output signal at longer intervals, they are not shown in the figure for simplicity. FIG. 2(B) shows an example of the picture signal to be applied to the comparators 7a, 7b and 7c. The comparators 7a, 7b and 7c, which have reference levels H, M and L, act to compare the input picture signal levels against the reference levels, so that the comparators 7a, 7b and 7c generate output pulses H, M and L, as shown in FIG. 2(C). The output from each comparator is applied to the input of the code converter 8, for coding said output. In the illustrated example, the output from the code converter assumes the values, as shown in FIG. 2(D): namely, a value "11" for the output H from the comparator, "10" for the output M from the comparator, "01" for the output L from the comparator, and "00" for the complete lack (B) of the outputs H, M and L. The information of FIG. 2(D) is successively stored in the memory 10, so that a pattern is stored in the memory; for instance, the pattern of an objective being analyzed, as shown in FIG. 3(A), is stored in the form of a digital pattern, as shown in FIG. 3(B). For simplicity, FIG. 3(B) shows the memory 10 as a cell grid of 10 rows and 11 columns, but the memory 10 in actual installations may have a different cell construction. In the example of FIG. 3(A), if the background is white (with a luminance of H level) and the S-shaped pattern is red (with a luminance of L level), the shaded cells in FIG. 3(B) store "01" signals, while the non-shaded cells store "11" signals.

Information processing and monitoring to be performed in the memory 10 will now be described by referring to FIG. 1.

A clock adjust 15 facilitates the adjustment of the period at which the output from the code converter is sampled. With the clock adjust 15, reference clock velocity (or sampling period) can be adjusted within a limited range, so that the pattern stored in the memory can be expanded (or reduced) in response to the limited adjustment of the clock speed, whereby electric adjustment for different positioning of the objective 1 relative to the camera 3 can be achieved.

Instead of writing only the pattern of the objective 1 being analyzed, it is possible to write other information in the memory 10 for processing therein. Such writing and processing of information are effected by a program-controlled computer, which is connected to a tape recorder 16 or a computer interface 17 communicating with the memory 10 through the buffer register 9.

After being suitably processed, the pattern stored in the memory 10 is ready for read-out into a proper output medium so as to become the input to a knitting machine. A suitable example of the output medium is a paper tape to be punched by a puncher 18. Since different knitting machines require different input forms of the pattern information, it is necessary to convert the information on the punched tape into the form suitable for a particular machine or to provide a suitable device, which is directly connected to the buffer register 9, for producing the memory output in a form suitable for the machine. If a knitting machine requires the pattern information in the form of punched tape, the embodiment of FIG. 1 can be used directly.

A switch 19 can select either the output pattern of the code converter 8 or the pattern stored in the memory 10, for display and monitoring at the monochromatic cathode ray tube 22 and the color cathode ray tube 23 through digital-analog converters 20 and 21, respectively. When the circuit of the contact a of the switch 19 is completed, the output from the code converter 8 is displayed at the cathode ray tubes 22 and 23, for showing a source image as scanned by the camera 3. On the other hand, when the switch 19 is turned to its contact b, the cathode ray tubes 22 and 23 display a pattern which is stored and processed in the memory 10. For color display at the color cathode ray tube (such as a shadow mask type tube), color matrix and other related control means are necessary, but such control means are essentially identical with those used in the conventional color television techniques. Accordingly, such control means are not explained herein.

A mask control 12 specifies an effective area which is to be displayed at the cathode ray tubes for pattern monitoring. The effective area may be specified in terms of UP, DOWN, LEFT or RIGHT, as shown in FIG. 4(A), and the non-specified or non-effective areas on the monitored picture are displayed as black areas or areas having a different luminance from that of the effective area. When an effective area is specified by the mask control 12, the address control 11 of FIG. 1 instructs the addresses of the non-specified or non-effective areas so as to produce a different luminance on the cathode ray tube screen than that for the effective area.

During the pattern monitoring, a shift control 14 facilitates the shift of the displayed pattern, vertically or horizontally, within the effective area relative to a preselected lines (X-shift or Y-shift), as shown in FIG. 4(B). The pattern of FIG. 4(B) corresponds to that which is produced by shifting the pattern of FIG. 4(A) to the left by a distance .DELTA.X; wherein, the picture elements a and b of FIG. 4(A) correspond to the picture elements a' and b' of FIG. 4(B), respectively, and the picture element c of FIG. 4(A) is turned around leftwardly until it appears as the picture element c' in FIG. 4(B). The shift function in the monitoring is useful in checking the repeat of a certain pattern. More particularly, since patterns of knit or woven wares are often formed by repeating a relatively simple pattern element or elements, the overall pattern can be monitored by drawing only the fundamental pattern element or elements on the objective 1 being analyzed and repeating the display of such element or elements through shifting. To effect modification during the aforesaid repeating check, the aforesaid mask control may be used. To fulfill the shift control, for instance, the sequence of the address instructions for the memory 10 by the address control 11 may be controlled.

An amend control 13 facilitates the color (or code) of specified picture elements stored in the memory 10 from the outside. This amendment is effected on the monochromatic cathode ray tube 22, while monitoring the pattern on the color cathode ray tube 23, which pattern is stored in the memory 10 in the aforesaid grid form. In amending, the addresses (X addresses and Y addresses) of the picture elements to be amended are specified, and colors of the thus addressed picture elements are specified, e.g., by the code of "00", "01", "10" "11", so as to modify the stored contents of the specified cells of the memory 10. To facilitate the addressing of the picture elements being modified on the color cathode ray tube 23, indicators may be displayed on the monochromatic cathode ray tube 22, as shown by the dot pattern of FIG. 5. The dot pattern, for instance, consists of bright spot displays of ten picture elements. FIG. 7 shows a circuit diagram of the unit for amendment operation in the pattern analyzing system of FIG. 1. In FIG. 7, an address of the Y axis (vertical axis) of an indicator (later described) on a screen of a monitor is applied to a Y address counter (Y) through a terminal Yin, and the content of the random access memory 10 indicated by the Y address counter is parallelly read on a register (REG 1), the content of which is serially transferred to a register (REG 2) through an AND circuit A1. The AND circuit A1 is opened when the signal R/W is 1. However, the signal R/W becomes 0 when amendment operation is performed, and at that time the AND circuit A1 is closed and the AND circuit A2 is opened. Further, during the operation of amendment, an AND circuit A3 is opened and an AND circuit A4 is closed by a control signal (AMEND). An amendment signal (AMEND SIG) whose content is 00, 01, 10 or 11, is applied to the AND circuit A3 and goes to the register (REG 2) through the AND circuits A3 and A2. Therefore, the content of the register (REG 2) is partially replaced by the output signal of the AND circuit A2 (=amendment signal). The X address (horizontal address) of the position to be amended is determined by the content of the X address counter X, which is fed the X address of an indicator on a screen of a cathode-ray-tube. The AND circuit A4 receives a signal from the buffer register 9 (FIG. 1 and FIG. 7).

With the present invention, the four different luminance levels of picture elements are used for identifying colors, so that if two or more colors on the objective being analyzed have the same luminances, it becomes difficult to distinguish the colors. For instance, if the luminances of the four colors "00", "01", "10" and "11" are as shown in FIG. 6(A), the colors "00" and "01" have an identical luminance level, i.e., the L level, and the two colors are hardly distinguishable. This difficulty can be easily solved by inserting a suitable color filter 2 between the objective being analyzed and the television camera 3, so as to selectively absorb a specific color. In the case of the luminance characteristics of FIG. 6(A), the absorption of the color spectral "00" by a suitable color filter will result in a different luminance characteristic, as shown in FIG. 6(B), so that the four colors become clearly distinguishable from the luminances thereof.

FIG. 8 shows an arrangement of an operation panel of the pattern analyzing system of FIG. 1. In FIG. 8, each of four switches in the frame "monitor" controls the monitor operation. When the switch "camera" is pushed, the output of the television camera 3 is displayed on the screen of the cathode ray tube 22 and/or 23. When the switch "compa" is pushed, the output of the code converter 8 is displayed on the screen of the cathode ray tube 22 and/or 23. When the switch "memory" is pushed, the signal read from the memory 10 is displayed on the screen of the cathode ray tube 22 and/or 23. And when the switch "write" is pushed, the pattern signal displayed on the screen is stored in the memory 10.

Several switches and potentiometers in the frame "comparator level" control the operation of the comparators 7a, 7b, 7c and the operation of the color cathode ray tube 23. The potentiometers H.sub.p, M.sub.p and L.sub.p determine the threshold level of the comparators 7a, 7b and 7c, respectively. The switches H, M, L and B, and four groups of the potentiometers R, G, B, control the color displayed on the color cathode ray tube 23. When the switch H is pushed, the color on the color cathode ray tube 23, relating to the comparator 7a disappears and only the black tone is displayed, then switch H is repushed, the color relating to the comparator 7a is displayed on the color cathode ray tube 23. At this time, the actual color displayed on the color cathode ray tube 23 can be adjusted by three potentiometers R, G and B. The potentiometers R, G and B control the deepness of three primary colors, red, green and blue, respectively. Therefore, the operator can adjust the three potentiometers R, G and B so that the color displayed on the screen of the color cathode ray tube, relating to the comparator 7a, is the same as that of the original color on the sheet. The function of the switches M, L and B, and each related groups of potentiometers R, G, B is the same as that of the switch H and its potentiometers, except that the switches M, L and B relate to the threshold level of the comparators 7b, 7c and the ground level, respectively.

The switch "DOT" in the frame "VIDEO FUNCTION" controls the dot pattern of FIG. 5. When the switch "DOT" is pushed, the pattern of FIG. 5 appears on the screen and when the switch "DOT" is repushed the same disappears.

The switch "MASK" controls the mask operation. When the switch "MASK" is pushed, the mask appears on the screen, and the size of that mask on the screen can be adjusted by the switches "WALE", and "COURSE" in the frame "MASK ADDRESS". The three figures of switches "WALE" and "COURSE" determine the longitudinal length and the width of the mask, respectively. The counters X and Y in the frame "MASK ADDRESS" display the coordinates of the mask on the screen.

The frames "INDICATOR ADDRESS" and "ADDRESS CONTROLLER" control the indicator on the screen. The indicator is a small bright spot on the screen for indicating an arbitrary point of the pattern. The indicator appears on the screen when the switch "IND" is pushed. The shape of the indicator is square, and the size of the same is adjusted by four figures of switches "1", "2", "4" and "8". The X and Y coordinates of the indicator on the screen are displayed on the counters "X" and "Y", respectively, and said coordinates can be adjusted by adjusting a ball controller BC.

The four switches H, M, L and B in the frame "AMEND" perform the amend operation. When one of the switches H, M, L, B is pushed, the color of the position indicated by the indicator is changed to the color relating to the H, M, L or B level.

The repeat switches "X" and "Y" control the repeat operation. The switch X performs the repeat of X-direction and the switch Y performs the repeat of Y-direction.

Now, the second embodiment of the present invention will be described with reference to FIGS. 9 through 13.

In FIG. 9, an electronic scanning device, e.g., a color television camera, scans an article or objective with a pattern to be analyzed, such as a picture design, a drawing, a sample cloth, or a model. More particularly, a electron beam scans an image formed on the screen of a camera tube of the device 31, so as to generate three analog primary color picture signals E.sub.R, E.sub.G, and E.sub.B in a sequential fashion, which signals represent the coloring of the objective.

The primary color picture signals from the aforesaid electronic scanning device are applied to .gamma. correction circuits 32, 33, and 34, respectively, for generating three corrected primary color picture signals E.sub.R ', E.sub.G ', and E.sub.B '.

The corrected primary color picture signals E.sub.R ', E.sub.G ', and E.sub.B ' are amplified by amplifiers 35, 36, and 37, and become signals E.sub.R ", E.sub.G ", and E.sub.B ", which signals are operated by a matrix 38 in accordance with the following equation (1), so as to produce a luminance signal E.sub.Y and chrominance signals E.sub.I and E.sub.Q respectively. ##EQU1##

Of the signals from the matrix 38, the luminance signal E.sub.Y is applied to a luminance level divider 39, and divided into a plurality of luminance levels with a predetermined level width, so as to become one of the divided luminance signals Y.sub.1, Y.sub.2, . . . Y.sub.6.

The chrominance signals E.sub.I and E.sub.Q are applied to a chrominance vector divider 40, and divided into one of a plurality of arbitrarily divided chrominance levels, so as to become one of the divided chrominance vector signals V.sub.1, V.sub.2, . . . V.sub.6, respectively.

One or both of the divided luminance signal and the divided chrominance vector signal are applied to a color identifying circuit 41.

The color identification at the circuit 41 is carried out on the basis of the divided luminance signal alone, or divided chrominance vector signal alone, or combination of the two kinds of signals, so that one of the color specifying signals C.sub.1, C.sub.2, . . . C.sub.6 is produced.

A color signal generator 43 generates three controllable primary color image signals out of six colors, which signals are so controlled in a color specifying matrix circuit 42, based on the aforesaid color specifying signals, that three primary color picture signals E.sub.R "', E.sub.G "', and E.sub.B "', corresponding to the aforesaid color specifying signals, are generated and displayed on a color display means 44, such as a color cathode ray tube.

The aforesaid color specifying signals are applied to a digitizing means 46 through an interface 45, for producing pattern signal. A control circuit 47 performs supervision and control of the electronic scanning device, the color display means and the interface.

Each portion of the aforesaid system according to the present invention will now be described.

The electronic scanning device 31 is, for instance, a color television camera, and includes a lens system and a camera tube, such as a vidicon or an image orthicon. The device 31 produces, on its screen an image of the objective with a pattern to be analyzed (e.g., a picture design, a drawing, a sample cloth, a model), so as to generate sequential analog picture signals E.sub.R, E.sub.G, and E.sub.B, representing three primary colors, red, green, and blue, respectively.

The three picture signals of primary colors are corrected by the .gamma. correction circuit 32, 33, and 34, to become corrected signals E.sub.R ', E.sub.G ', and E.sub.B ', which are amplified by the amplifiers 35, 36, and 37 so as to become the signals E.sub.R ", E.sub.G ", and E.sub.B ". The amplified signals are applied to the matrix circuit 38 for producing the following luminance signal E.sub.Y and chrominance signals E.sub.I and E.sub.Q by the aforesaid equation.

fig. 10 shows the relation between the input waveform (A) of the luminance level divider 39 and output waveform (B) thereof. The luminance level divider has six preset levels (L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, and L.sub.6) and preset level widths (.DELTA. L.sub.1, .DELTA. L.sub.2, .DELTA. L.sub.3, .DELTA. L.sub.4, .DELTA. L.sub.5, and .DELTA. L.sub.6) for the different luminance levels, so that one of the divided luminance levels Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4, Y.sub.5, and Y.sub.6 is generated, depending on the level of the sequential luminance signal E.sub.Y. The levels (L.sub.1 through L.sub.6) and the level widths (.DELTA. L.sub.1 through .DELTA. L.sub.6) can be arbitrarily selected, and the divided luminance signals Y.sub.1 through Y.sub.6 are pulse signals whose pulse widths are modulated. Those skilled in the art can easily design a luminance level divider fulfilling the aforesaid functions, for instance, by combining a plurality of Schmidt circuits and gate circuits. Thus, the input luminance signals are quantitized.

FIG. 11 is an I-Q graph showing the operation of the chrominance vector divider 40. The divider 40 determines the instantaneous coordinates of the input signals E.sub.I and E.sub.Q on the I-Q graph of FIG. 11, so as to identify one of a plurality of colors (e.g., six colors), depending on the angular deviation from a reference axis (e.g., +Q axis). In other words, the central values of reference angular deviations and allowable widths thereof are predetermined, so that one of the divided chrominance vector signal V.sub.1 through V.sub.6 can be instantly produced as the output signal, depending on the input chrominance signals E.sub.I and E.sub.Q. The divided chrominance vector signals are also pulse signals whose pulse widths are modulated, as in the case of FIG. 10. It is preferable to make both the central values of the angular deviations and the angular widths variable from the outside by a suitable electric means. Thus, the chrominance of the input signal is quantitized.

FIG. 12 illustrates the essential portion of the color identifying circuit 41. The color identifying circuit 41 has switches 48, 49, and an AND gate circuit 50 for each of the color specifying signals C.sub.1 through C.sub.6, but only those for the color specifying signal C.sub.1 are shown in the drawing, for simplicity. The circuit construction for other color specifying signals C.sub.2 through C.sub.6 are identical with that shown in FIG. 12. In FIG. 12, the switches 48 and 49 act to select one of the divided luminance signals Y.sub.1 through Y.sub.6 and one of the divided chrominance signal V.sub.1 through V.sub.6, respectively. The two output signals from the switches 48 and 49 are applied to the input of the AND circuit 50, and a color specifying signal C.sub.1 appears at the output of the AND gate 50. The switches 48 and 49 are disposed at suitable positions for operation of the pattern analyzing section according to the present invention. For instance, if the contacts of the switches 48 and 49 are connected to Y.sub.1, the color specifying signals C.sub.1 satisfies the condition of C.sub.1 =Y.sub.1. On the other hand, if the contacts of the switches 48 and 49 are connected to V.sub.1, the color specifying signal C.sub.1 satisfies the condition of C.sub.1 =V.sub.1. Furthermore, if the contacts of the switch 49 are connected to V.sub.1, while connecting the contacts of the switch 48 to Y.sub.1, the color specifying signal C.sub.1 is produced when the luminance is Y.sub.1 and the chrominance is V.sub.1. Thus, by using suitable combinations of the contacts of the switches 48 and 49, the color specifying signals can be related to the luminance and chrominance of each picture element of the source picture (pattern to be analyzed) in a suitable fashion.

FIG. 13 shows a detailed circuit diagram of the color specifying matrix 42. The color specifying matrix circuit 42 has six logic circuits 51 through 56, and each logic circuit has three AND circuits. In FIG. 13, for the sake of simplicity only AND circuits 51a, 51b, and 51c of logic circuit 51 are illustrated. As mentioned above, the color signal generator 43 (FIG. 9) generates electric signals (C.sub.1 ' through C.sub.6 ') corresponding to a plurality of colors (six colors in the illustrated embodiment), and the three primary color picture signals [(E.sub.R1, E.sub.G1, W.sub.B1), . . . , (E.sub.R6, E.sub.G6, E.sub.B6)] are applied to the color specifying matrix circuit 42, and such electric signals are gated by the color specifying signals C.sub.1 through C.sub.6. As is apparent from the foregoing explanation, since only one of the color specifying signals C.sub.1 through C.sub.6 is turned on at one time, the plurality of color signals C.sub.1 ' through C.sub.6 ' are gated by the color specifying signals C.sub.1 through C.sub.6, respectively, so as to successively provide the desired three primary color picture signals (E.sub.R "', E.sub.G "', E.sub.B "') for display at the color display means. Since the color signals C.sub.1 ' through C.sub.6 ' are electrically controllable, the color display means 44 (FIG. 9) can monitor not only the accurate reproduction of the source picture (pattern to be analyzed) but also a picture with picture elements having colors substituted for those of the source picture.

On the other hand, the color specifying signals C.sub.1 through C.sub.6 are applied to the digitizing means 46 through the interface 45, wherein the color specifying signals C.sub.1 through C.sub.6 are digitized for each picture element at suitable sampling intervals, for providing sequential digital signals. The digital signals are stored as the pattern signal, which is used for producing a Jacquard pattern by a knitting machine. A conventional digitizing circuit can be used for the aforesaid digitizing means, and the output from the digitizing means are stored in any of the known memories, such as punched paper tape or magnetic tape. The information thus stored in the digital form, of course, corresponds to the coloring of each picture element of the source picture.

As is apparent from the foregoing disclosure, with the system according to the present invention, a pattern signal for producing a Jacquard pattern by a knitting machine can be generated, while monitoring the analyzed pattern by a color display means and while allowing the adjustment of at least one of the level and level width for luminance division and the level and level width for the chrominance division, so that the desired pattern signal can be quickly and directly produced with a high accuracy. Thus, the system is simplified and its cost is reduced from the prior art.

It should be noted that the use of the signals E.sub.Y, E.sub.I, and E.sub.Q is not essential for producing the color identifying signals C.sub.1 through C.sub.6, and the output signals E.sub.R, E.sub.G, and E.sub.B from the television camera may be analyzed and synthesized in such a manner that the aforesaid signals C.sub.1 through C.sub.6 can be directly provided.

Outstanding effects which can be achieved by the pattern analyzing system according to the present invention are as follows.

(1) Conventional techniques for pattern analysis have a restriction that the objective pattern to be analyzed must be a design drawn on a section paper which can be wound around a rotary drum. The present invention eliminates such a restriction by using a television camera.

(2) The time necessary for the pattern analysis is very short, as compared with that of a conventional mechanical system.

(3) As compared with conventional techniques, the color identification can be effected faster with a higher accuracy.

(4) Repetition of a pattern can be electronically checked with ease.

(5) Erroneous color identification can be easily corrected by an amend mechanism.

(6) When the system of the invention is combined with a soft-ware controlled computer, it becomes possible to combine a plurality of patterns and to synthesize a large pattern.

From the foregoing it will now be apparent that a new and improved pattern generating system has been found. It should be understood, of course, that the embodiments disclosed are merely illustrative and are not intended to limit the scope of the invention. Reference should be made to the appended claims, therefore, rather than the specification as indicating the scope of the invention.