JPH0224433B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a device for recording a color separated image to be recorded with characters indicating the separated colors in a color scanner for plate making. A color scanner for plate making separates each color plate of "yellow", "magenta", "cyan", and "black", and in order to identify each color plate, during plate making, non-image areas on the recording sheet of photosensitive material are used. There is a request to record characters in the margins of . Usually, register marks in the margins of the output film of a color scanner are marked according to each separation.
To produce the letters "Y", "M", "C", and "K",
Data of a multi-row pattern of dots constituting a character is stored in a character generator that converts it into dot data in a matrix of a required matrix.
It must be addressed with a column address signal so that the signal of a given character is output on a single film simultaneously with the image signal. SUMMARY OF THE INVENTION An object of the present invention is to provide a device for recording characters by using a separately provided storage device that can compress data of a multi-row pattern of dots forming characters. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 illustrates predetermined characters using an 8×8 dot matrix. In this dot pattern, for the character Y, a black dot representing a stroke exists in the 0th column and 0th line, but does not exist in the 1st to 7th lines. There is no black dot in the 1st column, 0th row, there is a black dot in the 1st column, 1st row, and there is no black dot in the 1st column, 2nd row to the 7th row. In this way, in the fourth column of the letter K, the second and fourth rows are black dots. In this way, for each column, the number of characters without black dots m ₁ , the number with black dots n ₁ , then the number without black dots m ₂ ,
The number n ₂ of black dots is expressed as... This results in a bit representation as shown in Table 1. (-) in Table 1 indicates that the data is not necessary.

[Table] FIG. 2 is a diagram showing an embodiment of the present invention. FIG. 3 shows a detailed embodiment of the character generator 5 in FIG. The timing of pulses in each part is shown in the timing charts of FIGS. 4 and 5. As shown in FIG. 2, the rotary drum 2 to which the recording sheet 1 is attached is rotated by a motor 3, and the encoder 4 detects that the rotary drum 2 is
Each rotation, a rotation period pulse T ₁ is generated once, and a clock pulse of 1000 pulses per rotation is generated.
rotational phase pulses T ₂ are generated. These pulses T ₁ , T ₂ enter the character generator 5 .
Based on the color plate designation from the console 7, the character generator 5 outputs the characters shown in FIG. 1 for each column according to the pattern shown in Table 1. 8 is a selector circuit, and this selector circuit 8
is configured to switch between the output of the character generator 5 and the output of the register mark generation circuit 6 and supply them to the recording and scanning mechanism together with an image signal PS (not shown). In the recording scanning mechanism, a recording head 11 having a modulator 10 driven by a signal supplied via a selector circuit 8 controls the exposure beam from a light source 12 and feeds it in synchronization with the rotating drum 2. The screw 13 is driven by the motor 14, and the recording head 1
1, one side of the recording sheet is scanned within a series of parallel scanning lines. The rotation period pulse _T1 is applied to a counter 21 that counts input pulses in accordance with the pitch of character dots, and this counter 21 is stored in a storage device such as a read-on memory ROM 22 that stores characters to be recorded. It outputs address signal 1. The output from the console 7 is a color plate designation signal.
The timing generator 20 enters the color plate designation signal for each separated plate, and the code circuit 23 converts it into a character color address signal, which causes the ROM 22 to output the requested character dot pattern. The ROM 22 is capable of selectively reading out 6-bit parallel data by addressing, for example, and 3 bits each are connected to preset terminals of a starting point counter 33 and a consecutive number counter 34. The output from the counter 33 is the NAND gate 3
5, the output of the NAND gate 35 becomes "L", and then the output of the counter 34 is inputted to the NAND gate 36, and the output of the NAND gate 35 becomes "L".
Set the output to "H". The device configured in this way can record specific characters by operating as follows. The rotary encoder 4 outputs a pulse as shown in FIG.
Generates T ₁ and T ₂ . Pulse T ₁ , T ₂ and console 7
Based on the output color plate designation signal, the timing pulse generator 20 outputs pulses T ₃ , T ₄ and color signals Y,
Generates M, C, and K. The counter 21 corresponds to the "column" shown in FIG. 1 and Table 1.
is being counted. The color signals Y, M, C, K are
The code circuit 23 converts it into a character color address. FIG. 5 is an enlarged timing chart showing the period before and after the character generation period _T3 . Details of character generation will be explained with reference to the circuit diagram of FIG. 3 and the timing chart of FIG. 5. The character generator 5 uses an internal AND gate 38
Therefore, the character pulse turn signal is output only when the pulse _T3 is "H". The row counter 25 is cleared by the "L" pulse _T4 . The output of the flip-flop 37 composed of NANDs 35 and 36 becomes "L".
The output of flip-flop 37 changes from "H" to "L"
, the one-shot circuit 29 generates a pulse, but since the pulse T ₄ is sufficiently longer at "L" than the one-shot pulse, the counter 25 remains cleared, and the AND gate 26 also detects that the pulse T ₄ is low. It stays in. Due to the falling edge of pulse _T4 , AND gate 26
via which the one-shot circuit 27 generates a pulse '. The time width of one shot' is ROM2
2 contains the output of the counter 25, and the time is set to be sufficiently longer than the access time T of the ROM 22. After the data output (m ₁ n ₁ ) of the ROM 22 becomes stable, a pulse is output from the one-shot circuit 28 at the rising edge of the pulse '. The counters 33 and 34 are, for example, counters equivalent to SN74193 manufactured by Texas Instruments, Inc. in the United States, and are used as down counters. The pulse loads counter 33 with m ₁ and counter 34 with n ₁ . Next, when the gate pulse _T3 becomes "H", the clock is input to the counter 33 via the AND gate 24 and the NAND gate 31,
is counting down. When the count output value reaches "0" and the clock becomes "L", the counter 33 outputs "L" from the borrow output, and the flip-flop 37 outputs "L".
is set, and the output becomes "H". When the output becomes "H", the NAND gate 31 is closed via the nut circuit 32, the clock remains at "H", the counter 33 sets the output value to "15", and the borrow also becomes "H". On the other hand, when the output becomes "H", the NAND gate 30 is opened, the pulse passes through, the clock enters the counter 34, and the counter 34 counts down. When the count output value reaches "0" and the clock becomes "L", the counter 34 outputs a borrow output, resets the flip-flop 37, and the output becomes "L". When the output changes from "H" to "L", a pulse is output from the one-shot circuit 29, the counter 25 increments the output value by "1", and the output is given to the ROM 22. ROM22 outputs after access time T.
Stably outputs m ₂ n ₂ . The output of one shot 29 is passed through AND gate 26 to one shot 2.
7 and generates a pulse ', the one shot 28 generates a pulse and loads the output m ₂ n ₂ into the counters 33 and 34. In this way, the operation as explained above is repeated, and eight lines (from the 0th line to the 7th line) are output from the AND gate 38, and the pulse _T3 becomes "L".
The output ends. Then, in the case of four-color simultaneous one-scanning line output or two-color simultaneous one-scanning line output, the color signal YMCK changes, the code circuit 23 switches the character color address, and pulses T ₃ and T ₄ are generated. , the above-described operations are repeated, and one column of dot patterns shown in FIG. 1 is output. In this way, when the rotary drum 2 rotates once, a pulse _T1 is generated, the character string address is updated by the counter 21, and the dot start point information and the consecutive dot number information are updated at a predetermined timing as described above. Readout, first and second counters 33, 34
A character pattern is output by converting the line data signal into a line data signal. In this way, in the device of the present invention, for example, characters with an 8 x 8 bit dot pattern can be
It is stored using bit dot start point information and 3 bits consecutive dot number information. In this way, by recording characters and the like for identifying each version on the recording sheet, it is extremely convenient that handling errors in the next step of image duplication can be eliminated.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a character pattern recorded by the apparatus of the present invention, FIG. 2 is a block diagram showing an apparatus for carrying out the method of the present invention, and FIG. The generator detail diagrams, FIGS. 4 and 5, are diagrams showing the timing within the character generator. 1...recording sheet, 2...rotating drum, 22...
...Storage device (ROM), 33...First counter,
34...second counter, 11...recording head,
PS...Image signal.

Claims (1)

[Scope of Claims] 1. In a color scanner for plate making that scans and records multiple types of color-separated images based on signals obtained by photoelectrically scanning a color original image, the color-separated image signals or characters are scanned according to the scanning area in the recording scan. A recording scanning mechanism that includes a recording head to which signals are applied and a rotating drum to which a recording sheet is attached, and a multi-row pattern that constitutes a character indicating the color type of each color separation image record a color separation image of the corresponding color type. a storage means that stores dot starting point information that is divided into dot starting point information and consecutive dot number information whose starting point is a required relative position with respect to the area; a first counter that is preset according to the dot starting point information; means for forming a row data signal by connecting a second counter preset according to the number of consecutive dots information in series with respect to the rotational phase pulse of the rotating drum; In a color scanner for plate making, which sequentially records color separation image signals of color types corresponding to characters recorded by data signals in accordance with a positional relationship based on dot starting point information stored in the storage means. Separated color display character recording device.