JPH04166860A - Copying device - Google Patents

Abstract

PURPOSE:To restore an original copy from a marked copy, as it is, by generating mask data for masking a color image which is judged to be a region specified color on the copy by a judging means in response to a copy mode given by a mode indicating means. CONSTITUTION:When a copy mode is given by an operating section, a mask processing section 40 generates mask data for masking a color image which is judged to be a region specified color on a copy by a color judging circuit 37 as a judging means in response to the copy mode, and outputs it to an erase unit to erase the latent image of the color image which is judged to be the region specified color on the copy formed on a photosensitive drum. An image in a region which is judged to be the region specified color on the copy by the color judging circuit 37 is developed in the region specified color and restored in monocolor by a developing unit. In addition, the image in the region which is judged to be the region specified color on the copy by the color judging circuit 37 is developed in the region specified color and restored in black by a developer. It is thus possible to easily restore an original copy from the copy marked by a marker.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a copying device that distinguishes color information on a document and reproduces the document image in different colors, and particularly relates to a copying device that distinguishes color information on a document and reproduces the document image in different colors. The present invention relates to a copying apparatus that performs a multicolor copying sequence inside and outside an area on a document.

[Prior Art] Conventionally, copying apparatuses of this type have been proposed that are configured to mask or trim image information inside and outside a designated area of a document.

[Problems to be Solved by the Invention] However, since the conventional copying apparatus operates to mask or trim image information inside and outside the set area, there are problems such as the following (11, (21), etc.).

(1) Since the area to be masked or trimmed is directly marked on the original, the original original is stained.

(2) It becomes impossible to reproduce the original document from the document marked with the marker.

This invention was made in order to solve the above problems, and it is possible to restore the original original from a marked original by masking the area determined as a color image on the original. The purpose is to obtain equipment.

[Means for Solving the Problems] A copying apparatus according to the present invention includes a mode instructing means for instructing a plurality of different copying modes, and a determining means for determining an area on a document according to the copying mode instructed by the mode instructing means. The image forming apparatus further includes mask data processing means for generating mask data for masking a color image determined to be a designated color.

Further, the image forming apparatus is configured to develop an image within an area determined to be the area specified color on the document by the determination means in the same color as the area specified color.

Further, the image forming apparatus is configured to develop an image within an area determined to be the area designated color on the document by the determining means with a predetermined development color.

[Operation] In the present invention, when the copy mode is instructed by the mode instruction means, the mask data processing means generates mask data for masking the color image determined by the determination means to be an area designated color on the document according to the copy mode. is generated and output to the erasing means, thereby making it possible to erase the color image formed on the photoreceptor and determined to be the area designated color on the document.

Further, the image within the area determined to be the area specified color on the document by the determining means is developed with the area specified color, making it possible to reproduce the image within the area in monochrome color.

Furthermore, the image within the area determined to be the area designated color on the document by the determining means is developed with the area designated color, making it possible to reproduce the image within the area in black.

[Embodiment] FIG. 1(a) is a cross-sectional view illustrating the configuration of a copying apparatus showing an embodiment of the present invention. Reference numeral 1 denotes an original table glass, on which an original is placed at a predetermined position. Reference numeral 2 denotes an original illumination lamp composed of, for example, a halogen lamp or a fluorescent lamp, which exposes the original placed on the original platen glass 1. Scanning mirrors 3a to 3C are housed in an optical scanning unit (not shown) and guide reflected light from the original to the reading unit 4 while reciprocating in the sub-scanning direction. The reading unit 4 includes an imaging lens 4
a. For example, C with a filter that separates the reflected light into colors.
Image sensor unit 4b (in this embodiment, 2
(including two sensors), an imaging lens 4c for an image sensor, and the like. 5 is a folding mirror, and the imaging lens 4
The reflected light imaged by a is reflected onto the photosensitive drum 6.

Reference numeral 7 denotes a pre-exposure lamp, which eliminates the charge on the photosensitive drum 6 in preparation for image formation. A charger 8 charges the photosensitive drum 6 uniformly. Reference numeral 9 denotes an eraser unit serving as a digital exposure means, which is composed of, for example, a laser, and emits a laser beam onto the image area of the photosensitive drum 6 corresponding to the image area detected by the image sensor 4b in parallel with the document exposure of the optical scanning unit. to erase the electrostatic latent image formed.

Reference numeral 10 denotes a fixed developing device, which stores, for example, black toner. 11 is a replaceable developing unit.

It is configured so that a user can easily set it in a predetermined position within the apparatus, and the developing unit 11 for each color is filled with developers for developing red, blue, and green. 1
2a, 12b are paper feed cassettes, each paper feed roller 13a,
The transfer sheet is fed into the apparatus by the drive of the transfer sheet 13b, temporarily stopped at the position where the registration rollers 14 are disposed, and then re-fed at the timing of the writing start position with the image formed on the photosensitive drum 6.

A transfer charger 15 transfers the toner image developed on the photosensitive drum 6 onto a fed transfer sheet.

A separation charger 16 separates the transfer sheet after the transfer operation from the photosensitive drum 6. 17 is a conveyor belt that conveys the transfer sheet after the transfer process has been completed to a fixing amount 18;
The fixing device 18 fixes the image.

Reference numeral 19 denotes a flapper that controls the transport bus of the transfer sheet after the fixing process in either the direction in which the paper discharge tray 20 or the intermediate tray 22 is disposed.

Feed rollers 21a to 21d feed the transfer sheet, which has been subjected to the -degree fixing process, to the intermediate tray 22 while being reversed (multiple) or non-reversed (double-sided).

Reference numeral 23 denotes a refeeding roller, which feeds the transfer sheet placed on the intermediate tray 22 again to the registration rollers 14 via the paper bus 24.
Transport it to the installation position.

25 is a controller unit that controls the copy sequence according to the copy mode instructed by the operation unit 26;
It generally controls a mask processing section (described later) that processes analog signals output from the reading unit 4 to generate mask data.

FIG. 1(b) is a block diagram illustrating the detailed configuration of the reading unit 4 shown in FIG. 1(a), and the same components as in FIG. 1 are given the same reference numerals.

In the figure, reference numerals 31 and 32 denote image sensors composed of COD and the like, which receive reflected light and output predetermined analog color signals to subsequent A/D converters 33 and 34. 35.36
is a shading correction circuit that corrects the effects of external light such as fluorescent lights. 37 is a color determination circuit that performs color separation of original colors and outputs a mark section signal 51g1 and mark color information 51g.
2 is output from the area editing processing circuit 39. A spatial filter 38 performs existing edge enhancement and smoothing processing based on the input mode switching signal 51g3. The area editing processing circuit 39 receives marker section signals 51g1. Marker color information 51g2. Mode switching signal s
i g4. Editing inside and outside the marker area is processed using the color information 51g5 specified within the marker. 40 is a mask processing section;
The eraser unit 9 is controlled based on the mask data generated by the area editing processing circuit 39.

In the copying apparatus configured as described above, when a copy mode is instructed by the operation section 26, which is a mode instruction means, the mask processing section 40, which is a mask data processing means, activates the judgment means (color judgment circuit) according to the copy mode. 37) generates mask data for masking the color image determined to be the region designated color on the original document and outputs it to the erase unit 9, and the color image determined to be the region designated color on the document formed on the photosensitive drum 6 is generated. Erase the latent image.

Further, the image within the area determined to be the area specified color on the document by the color determination circuit 37 is developed in the area specified color, and the image within the area is reproduced in monochrome by the developing unit 11.

Further, the image within the area determined to be the area designated color on the document by the color determination circuit 37 is developed with the area specified color, and the image within the area is reproduced in black by the developing unit 10.

Specifically, the color information of the original is read by the image sensors 31 and 32, and the color information of the original is sent to the A/D converter 3 as an analog signal.
3.34 and converted into a digital signal. The image sensor 31 before the document illumination lamp 2 is lit,
Shading correction is performed based on each output of 32, and the corrected color signal is manually input to a color determination circuit 37. Here, the color determination circuit 37 generates a marker section signal 51g1 and marker color information 51g2, and inputs them to the region editing processing circuit 39 at the subsequent stage. At this time, image information after edge enhancement processing or smoothing processing is input to the region editing processing circuit 39 using the mode switching signal 51g3 generated by the spatial filter 38 in the image region separation circuit. Next, color separation processing is executed based on a flowchart described later using the input mode switching signal 51g4 or color information 51g5.

FIG. 2 is a flowchart showing an example of the first marker mode switching processing procedure in the copying apparatus according to the present invention. Note that (1) to (5) indicate each step.

First, the controller unit 25 analyzes the marker color information 51g2 input from the color determination circuit 37 [11, If it is determined that the mode is 1, the controller unit 25 specifies a mode in which the specified marker area is printed in the same color as the marker color. ), and outputs a mode switching signal 51g4 indicating this to the area editing processing circuit 9 (5).

On the other hand, if it is determined that the mode is 2 in step (1), the mode for printing within the specified marker area in the user specified color is specified (3), and the mode switching signal 51g4 indicating this is sent to the area editing processing circuit. Output to 9.

Also, in the judgment of step (1), mode 3 (Prints outside the specified marker area in black, masks the marker part and inside the specified marker area, then masks the area with the marker, and specifies the area with the marker. If it is determined that the mode in which the area specified by the marker is printed in the original color is selected (4), the mode in which the area specified by the marker is printed in the original color is specified (4), and the mode switching signal 51g indicating this is selected.
4 is output to the area editing processing circuit 9.

FIG. 3 is a flowchart illustrating an example of the second marker mode switching processing procedure in the copying apparatus according to the present invention. Note that (1) to (5) indicate each step.

First, the controller unit 25 analyzes the marker color information 51g2 inputted from the color determination circuit 37 (1), and if it is determined to be mode 1, specifies a mode in which the designated mark area is printed in the same color as the marker color (2). ), and outputs a mode switching signal 51g4 indicating this to the area editing processing circuit 9 (5).

On the other hand, if it is determined that the mode is mode 2 in step (1), the mode for printing within the specified marker area in the user specified color is specified (3), and the monid switching signal 51g4 indicating this is sent to the area editing processing circuit. Output to 9.

Also, in the judgment of step (1), mode 3 (Prints the area outside the specified mark area in black, masks the marker part and inside the specified mark area, then masks the area with the marker, and specifies the area with the marker. If the mode is determined to be a mode that prints the area within the black area),
A mode in which the designated marker area is printed in black is specified (4), and a mode switching signal 51g4 indicating this is output to the area editing processing circuit 9.

[Effects of the Invention 1] As explained above, the present invention includes a mode instruction means for instructing a plurality of different copying modes, and a determination means for determining an area designation color on a document according to the copy mode instructed by the mode instruction means. Since a mask data processing means for generating mask data for masking the determined color image is provided, the original document can be easily restored from a document on which area information designated by color is marked with a marker or the like. can do. Therefore, the original document can be stored in its original state without being soiled.

In addition, since the image in the area determined to be the area specified color on the document by the determination means is developed in the same color as the area specified color, the color is specified for the part of the document with the color specified except for the area specified. It can be restored in its original state.

Furthermore, since the image in the area determined to be the area specified color on the document by the determination means is developed in a predetermined standard image color, the portion of the original with color specified except for the area specified is converted into a normal black and white original. It can be restored as.

Therefore, an excellent effect is achieved in that a desired original document can be easily restored from a document whose area is designated by color information.

[Brief explanation of drawings]

FIG. 1(a) is a sectional view illustrating the configuration of a copying apparatus showing one embodiment of the present invention, and FIG. 1(b) is a sectional view illustrating the detailed configuration of the reading unit shown in FIG. 1(a). A block diagram, FIG. 2 is a flowchart showing an example of the first marker mode switching procedure in the copying apparatus according to the present invention, and FIG. 3 is a flowchart illustrating an example of the second marker mode switching procedure in the copying apparatus according to the invention. It is a flowchart. In the figure, 9 is an eraser unit, 25 is a controller section,
26 is an operation unit, 31.32 is an image sensor, 33.3
4 is an A/D converter, 35 and 36 are shading correction circuits, 37 is a color determination circuit, 38 is a spatial filter, 39 is an area editing processing circuit, and 40 is a mask processing section.

Claims (3)

[Claims] (1) A plurality of developing means for developing the electrostatic latent image formed on the photoreceptor in different colors, an erasing means for erasing the charge on the photoreceptor corresponding to the mask area on the document, and an area designated by the color. A copying apparatus comprising a color separation means for optically reading a printed original and separating a color image signal into a plurality of color signals, and a determination means for determining an area designated color on the original based on the output from the color separation means. The apparatus includes a mode instruction means for instructing a plurality of different copy modes, and mask data for masking a color image determined by the determination means to be an area designated color on the document according to the copy mode instructed by the mode instruction means. 1. A copying apparatus comprising a mask data processing means for generating mask data. (2) The copying apparatus according to claim 1, wherein the image within the area determined to be the area designated color on the document by the determining means is developed in the same color as the area designated color. (3) The copying apparatus according to claim (1), wherein the image within the area determined to be the area designated color on the document by the determining means is developed with a predetermined development color.