JPS59205875A - Picture processing device - Google Patents

Abstract

PURPOSE:To attain the converting processing only for color information without destroying read color picture information by providing a color information storage section stored at each color separation information and a means storing picture information of a color conversion designating area. CONSTITUTION:Three color signals B,G,R separated by a signal processing circuit 201 is written in a main memory 206 via a line memory 204. A color conversion designating area designated by a light pen is stored in a memory 208. The color conversion is attained as to an area in the memory 208 designated by the light pen from the input of a key for color conversion on a key input board 210. When a picture forming command is inputted from the key input board 210 is inputted, a controller 212 supplies each RGB signal to laser oscillators 402- 404 via a buffer memory 454 of a color picture recorder 400 from the memory 206. Then, the converting processing only for the color information is attached in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an image processing apparatus capable of performing color image conversion processing for converting color image information into other color image information.

BACKGROUND TECHNOLOGY Conventionally, in a device that reads a color image original and converts the read color image information into a digital copy using electrophotography, etc., when attempting to perform color conversion on the read color image information and reproduce the reproduced image, However, the technology for performing color conversion is complicated, and as a result, the overall size of the device becomes large and the manufacturing cost also rises. Because of these problems, devices that perform color conversion to obtain reproduced images have rarely been implemented.

OBJECTIVES An object of the present invention is to provide an image processing device which has a simple configuration and is capable of color conversion of color image information to IiM values.

The present invention will be described in detail with reference to column A and page 121.

FIG. 1 shows the overall configuration of an image forming system to which the present invention is applied. Here, 100 is an imaging device that converts a color image into a video signal, and 200 is a video signal No. 1□ from the imaging device 100, which is red (R), green (G), and jllllB.
300 is an image controller that converts the signals into three-color separation numbers R, G, and B signals and stores them in memory, and 300 displays image information stored in the image controller 200.
RT display, and 400 is an image controller 200
This is a color double-image recording device that records the image information recorded in tQ at the end of the month (month -1).

In the color image recording device 400, an image processing unit t
□4Ql is R supplied from the image controller 200,
Each of the G and B signals is converted into an image signal. Image signals are transmitted by laser oscillators 402, 403 and 404, respectively.
supplied to The laser oscillators 402, 403 and 404 convert each of the supplied signals into a blinking signal of the laser beam, which is transmitted to each scanner 405, 406 and 4, respectively.
It will be emitted on 07. Each of the scanners 405 to 407 irradiates the photoreceptor 408 with optical output from the laser oscillators 402 to 404.

403 is a primary charger for primarily charging the surface of the photoreceptor 408, 410 and 411 are secondary chargers having the same polarity as the primary charger, and 412 and 413 are 21'! 11 and a second exposure light source. 414 is a blue developer that visualizes a latent image corresponding to the blue (B) image formed on the photoreceptor 408; 415 and 416 are green photoreceptors 408, respectively;
This is a transfer charger for transferring a visible image formed on copy paper to copy paper. At the transfer position by this transfer charger 417, copy paper 418 or 419 is transferred from paper feed cassette 420 or 421 to paper feed roller 422 or 423, respectively.
．． Conveyance roller pair 424 or 425, conveyance roller pair 42
6, and then the photoreceptor 408
A;1 alignment with the beginning of the visible image above is performed. 429
is a troller for separating the copy paper on which the visible image has been transferred from the surface of the photoreceptor 408, and the copy paper with bamboo shavings 1 on it is sucked onto the surface of the conveyor Pel I/431 by the suction fan 430. The image is conveyed to a fixing unit 432 by this conveyor belt 431 . This unit, )432,
The copy paper with the transferred visible image fixed on its surface is discharged onto #J1 output I/ray 434 via a pair of discharge rollers 433.

Next, 435, 436 and 437 are respectively blue (
B) A blue beam detector, a line beam detector, and a red beam detector are arranged at the irradiation position of the photoreceptor surface with laser light corresponding to green (G) and red (R) color image information.

FIG. 2 shows a block diagram of an electric circuit for processing image information in this embodiment. Here, in the image controller 200, 201 is a signal processing circuit that converts color image information supplied from the imaging device 100 into R, G, and H signals and generates a synchronization signal, and 202 is a signal processing circuit 201.
An A/D processing circuit 203 digitally converts each R, G, and B signal supplied from the signal processing circuit 20+, and an A/D processing circuit 203 determines the write timing to the line memory 204, which will be described later, based on horizontal and vertical synchronization signals supplied from the signal processing circuit 20+. This is a write controller I/roller that controls the following. Reference numeral 204 is a line memory, and R, G, and B (number A) digitized by the A/D processing circuit 202 are supplied to this line memory 204 as a 6-bit digital signal and adjusted to the timing of the main memory 206. 205 is a DMA (direct memory access) controller I roller for synchronizing the timing between the line memory 204 and the main memory 208, and 206 is a main memory for storing each image information provided from the line memory 204. .In this main memory 206, 206a is Rjll memory, 20
6b is a G memory, and 206c is a B memory.

Next, 207 is a central control unit (CPU) that controls writing and reading of information in the main memory, etc.
, 208 +; [PU207) Writes control programs, etc. ROM and R for temporary storage of data, etc.
209 is a key person output device for inputting data to the CPt 1207; 210 is a key person capo-I for the operator to input data and instruct various operations;
11 is a light pen Ink-2 Ace for specifying an area of an image displayed on the CRT display 300;

212 is CPU20? Write data to each color memory 208a, 208b, 208c in the main memory 2Of3 according to the area conversion data code supplied from the main memory 2Of3.

213 is a buffer memory for temporarily storing data designated for area conversion;
14 is C11i'T display 3008 Yohi color 1σ
A video read cone controller 215 controls the output of image information for the q image recording device i, 400, and a D/A ink-face converts the digital image signal supplied from the main memory 20B into an analog image signal.

Next, the image processing unit 4 of the color image recording device 400
The configuration of 01 will be described. 450a, 450b and 45
0c is a signal processing unit for B, a signal processing unit for G, and a signal processing unit for R, respectively. Since these units have the same configuration, only the unit 450a will be described. In the unit 450a, j51 is a comparator for converting the multi-focus digital image signal sent from the main memory 206c into a blinking signal of laser light;
452 is a dither ROM that stores a random threshold value for reproducing density within a certain area, and a comparator 451
Then, the digital image signal from the main memory 206C is compared with the threshold value of the dither R00M452 and converted into a blinking signal of laser light. 453 is a dither controller that controls the address of the dither ROM; 454 is a comparator 451
A buffer memory 455 is used to synchronize the laser blinking signal supplied from the beam detector 4 with the detection signal from the beam deflector 435 generated every line.
The reading of data from the buffer memory 454 is controlled by the detection signal from 35, and the horizontal synchronization signal H3YNC
Write that controls data writing by.・+' It is a condensed controller I roller.

In Europe, the 456 has a CPU that controls each 7+1 (
457 is the output I1 for operating the solenoid clamper
0.458 is the input I that receives the image leading edge detection signal.
10.45!9・lO CPυ456's ilt control program is stored in the ROM and RAM used as a register Memory including Q, 460 is the image leading edge detector for 3 images, 461 is the image leading edge detector for 0 images, 462 is the image leading edge detector for 0 images, It is an image leading edge detector with 8 images.

Next, the operation of this embodiment configured as described above will be explained.

Upon receiving the color video signal from the imaging device 100, the signal processing circuit 201 converts the supplied color video signal into three-color separation signals B, Gj?, in synchronization with the timing of the carrier signal from the horizontal synchronizing signal H5YNC. Convert to At this time, the horizontal and vertical synchronizing signals HSYNC and VSYNC are also transferred to the J: write controller 203, and further these signals are sent to the addresses of the A/D conversion processing circuit 202 and line memory 204. Here, since the video signal is high-speed, the video signal is transferred to the line memory 20.
4 is stored for one horizontal line, and transferred to the main memory 206 every -line, and as shown in FIG.
YNc worth of signals are stored in memory, and l vertical 1 synchronization signal VS
The image information of the three colors B, G, and R is written into the main memory 206 in this way.

Next, the operation of outputting the information in this memory 206 to the GRT 300 will be described. Video read controller 214
Is the CPU 20? When activated, upon receiving a video synchronization signal from the video read controller 214, the write/read controller 212 directly transfers data from the main memory 206 to the D/A interface 21.
Output to 5. Here, the D/A interface 21
5 receives a synchronizing signal from the video read controller 214 and outputs the image information supplied from the memory 20B to the CRT 300 as an analog signal. This allows CI
'An image is displayed on the JT.

Here, when a display color information designation command is input from the key manual holder 210, the CPU 20? cuts off all control of the main memory 206 from other sources with respect to the data in the main memory 206.

Next, the address area as position information specified by the light pen/f cover face 211 is CPU 20? is maintained in the RAM space of memory 208 under the control of.

Thereafter, the color conversion of the area specified by the light pen is performed using the color conversion keys on the keyboard board 210.

Ru. First, when points A and B are read with a light pen, the write/read controller 212 transfers the image data from the A address to the B address from the R area 206a of the main memory to the buffer memory 213. When the data transfer to the buffer memory 213 is completed, the transferred image data is transferred to the CPU 20? In response to an image data transfer start command from , transfer to the B memory 206C is started. When the image data transfer is completed, the CP
A termination signal is supplied from the controller 212 to U207.

Next, when an image creation command is input from the keyboard board 210, the CPU 207'i) outputs a read command to the write/read controller 212.

At this time, in the color image recording device 400, the beam detect (i"ff number BD) is detected, and this signal BD is input to the write/read controller 212, and in accordance with this, the image data in the main memory 206 is output. The operation starts.Here, the main memory 20θ
Image data output from the 1-image leading edge detection unit 4 is started. That is, the CPU 4513 sends a B image leading edge detection signal to the corrupt read controller 455, and thereby the write read controller 455 sends an address signal to the main memory 206. By outputting this address signal, the B image data is transferred from the main memory 208C to the B image signal processing unit 450a. Here, the transferred image data is stored in a dither ROM 452 in a device 451.
The content of the teaser ROM can be changed by directing the dithering area to the dither controller 453 under the control of the human body CPU 207.

The 2-sen image data output from the comparator 451 is written into the buffer memory 454 by a transfer signal sent from the main memory 208. Furthermore, it is read out from the buffer 7 memory 454 by a color image transfer signal synchronized with the signal BD from the B beam detector 435 for color image processing.

In this way, the outputted B (blue) signal is
Point M(,
It is output as M number and scanned by the scanner 407 to the photoreceptor 4.
08 is scanned in a direction perpendicular to the direction of rotational force. In addition, this laser light is irradiated onto the B beam detector 435,
As a result, a signal B[l is output. A latent image formed on the surface of the photoreceptor by this blue signal is transferred to a blue developing device 4.
14.

Next, the green image signal is transmitted to the green laser oscillator 40.
3 is output as a laser beam, a latent image is formed on a photoreceptor 408 by a scanner 406, and then developed by a developer 415. Output as laser light,
A latent image is formed on a photoreceptor 408 by a scanner 405 and developed by a developer 416 .

To explain the surface potential of the photoreceptor during image formation, as shown in FIG.
It is charged so that its surface potential becomes approximately eoov.

In the step (II), a first electrostatic latent image is formed by the B laser beam, and at this time, the surface potential is attenuated to about 50 V in the bright exposed area.

In the step (I[), for example, magnetic brush development is performed using a two-component developer mixture of blue toner and iron powder carrier. At this time, reversal development is performed while applying a bias voltage of, for example, about 200 V to the developing means 414 such as a magnetic sleeve.

In the step (■), a charger 410 charges the surface of the photoconductor with 1
Next, ;t), perform weak charging with the same polarity as the ton. This secondary,
:B: The electric potential of the photoreceptor is +50V to 300V.
It is about U17. As a result, the surface of the photoreceptor is charged to about 80V.

In step (V), the surface of the photoreceptor is weakly exposed from the exposure source 412. is applied to set the potential of the non-developed area to +000V.

In the step (VI), the photoreceptor is used for G-the light L2.
A second latent image is formed by 3-r light.

In step (■), the green insulating toner T2 is developed by a jumping development method. In this second development, the magnetic sleeve is exposed to I)C in an alternating electric field.
Development is performed by applying a bias voltage of 300V.

Step (■)] In the second step, the belt is
The heavy equipment 411 performs weak charging with the same polarity as the primary charging.

In the step (IX)'I, as in the step (V), weak exposure is performed from the exposure light source 413 to give 4 and the undeveloped area is exposed to 600.
Make it v.

In the (X) step, the surface of the photoreceptor is exposed to R laser light from step 3 to form a third latent image.

In step (XI), the red insulating toner T3 is developed by a jumping development method. In this third development, the magnetic sleeve was exposed to an alternating electric field at DC40.
Development is performed by applying a bias voltage of 0V.

The color visible image formed on the surface of the photoreceptor through the above-described steps is transferred to the copy paper 418 or 419 conveyed from the cassette 420 or 421, and fixed via the fixing device 432. In this way, the copy paper with the color image recorded on its surface is discharged onto the discharge tray 434.

Note that the color image recording device 400 is not limited to the above-mentioned embodiments, and may of course be, for example, a 4-drum type color copier, a 1-drum type multiplex color copier, or an inkjet printer. .

Effects As explained above, according to the present invention, it is possible to perform conversion processing of only color information with a simple configuration and at low cost without destroying the color image information fU obtained from 5 frames.

[Brief explanation of the drawing]

Figure 1 shows a schematic configuration IA showing an embodiment of the present invention;
The figure is a program diagram showing the control system of the device shown in Fig. 1, and Fig. 3 is a timing diagram showing the timing of writing to the memory.
FIG. 4 shows seven CRT displays 100...imaging device 200...image controller 201...signal processing circuit, 202...A/D conversion processing circuit, 203...writing controller, 204...・Line memory, 205...DMA controller, 208a, 208b, 20Bc-main memory, 207
...Central control unit I (CPU), 208...
Memory, 209...Key I10. 210... Key human power board, 211... Interface, 212... Controller, 213... Buffer memory, 214... Video read controller, 215...
D/A interface. 300... CRT display 400... Color image recording device 401... Image processing unit, 402.403, 404... Laser oscillator, 405.
406,407...Scanner, 408...Photoreceptor, 408...Primary charger, 410.411...Secondary charger, 412.413...Exposure light source, 414.415,418... ...Developer, 417...Transfer/112 unit. 435,436.437...Beam detector. 4θ1...Image processing units 450a, 450b, 450c = Shingin processing unit
-1451... Comparator, 452... Dither ROM, 453... Dither controller, 454... Buffer memory, 455... Controller, 456... CPU, 457... Output I10. 458...Input I10 458...Memory, 460.461, 462...Image leading edge detector.

Claims (1)

[Claims] 1) Color image information is separated into multiple colors, and each color separation information (・
1.70 means having a plurality of color information storage units stored for each image; and specifying means for specifying an image area to be subjected to color conversion;
a second storage means for reading image information of a designated image area from the first storage means and storing it at one time; a color designation means for designating color information; and a color information designated for the contents of the second storage means. an image processing apparatus, comprising means for storing color information in a color information storage section of the first te means corresponding to the color information storage section of the first te means. 2. The apparatus according to claim 1, further comprising display means for reproducing and displaying the information stored in the first storage means,
The image processing apparatus is characterized in that the specifying means specifies an image area from the display image calculated by dividing the table 71 by the means. 3) An image processing apparatus according to claim 1, further comprising a recording means for recording an image on a recording material according to the image information stored in the first storage means.