JPS63261372A - Image forming device - Google Patents

Abstract

PURPOSE:To easily and accurately specify a copy area and its process by providing a detecting means which detects and area indicated in specific color on an original and an inhibiting means which inhibits an image from being formed inside or outside the area. CONSTITUTION:When the original 40 where a frame 41 is entered by using blue with low drum photosensitivity is placed on an original platen and read, a CCD 20 inputs all image data on the original 40 to a CPU 22 and a CCD 21 inputs image data except the red frame 41 of the original 40 to the CPU. When this original 41 is copied, the original 41 is mounted on the original platen 4 and scanned. At this time, a F-directional subscan is made according to position information in the memory 24 and all LEDs 27 are turned off in areas 43 and 45. Then only LEDs 27 corresponding to an area 47 in a main scanning direction are turned on in an area 44 to perform exposure, so that only the part in the area 42 is erased and not copied. Consequently, an area which need not be copied is specified and a copy is taken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus that can specify a copy processing area.

[Prior Art] Generally, in an image forming apparatus capable of specifying a copy area and copying, area specification is performed manually using XY coordinate values.

Further, processing within a designated area (for example, whether to copy only the area within the area or copy the area outside the area) is performed by manual operation of operation buttons.

[Problems to be Solved by the Invention] However, with this method, it is necessary to input the image forming apparatus manually to find the area of the original to be copied, which makes the manual operation complicated. It took time to set the coordinates because it was not easy to associate them with the coordinates, or the correspondence between areas was misread. Furthermore, since the processing must be specified for each document, the operation becomes complicated, which is a big problem in practical use.

The present invention has been made in view of the above-mentioned conventional example, and an object of the present invention is to provide an image forming apparatus that can easily and accurately specify a copy area and processing of the area.

[Means for Solving the Problem] In order to achieve the above object, the image forming apparatus of the present invention has the following configuration. That is, it is an image forming apparatus that photoelectrically reads a document image to form an image of the document image, and includes a detection means for detecting an area indicated by a predetermined color on the document, and a detection means for detecting an area indicated by a predetermined color on the document, and a detection means for forming an image in the area. and prohibition means for prohibiting image formation outside the area.

[Operation] In the above configuration, the detection means detects a designated area written in a predetermined color on the document, and operates to prohibit image formation within the area or prohibit image formation outside the area.

According to a further preferred embodiment, the designated color of the region operates to image within the region or to image outside the region.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Explanation of a sectional view of the electronic copying machine (FIG. 2)] FIG. 2 is a longitudinal sectional view of the electronic copying machine in which the copy area of this embodiment can be specified.

The reflected light from the original on the original platen 4 irradiated by the light source 5 is directed by the moving optical system 6 and directed to the imaging lens 2.
8 and is imaged on the photosensitive drum 30 via a group of fixed reflecting mirrors 8.

This photoreceptor drum 30 has a photoreceptor layered on its outer periphery and rotates in synchronization with the moving optical system 6.

7 is a control unit that controls the entire device. Around the photoreceptor drum 30, devices for performing an electrophotographic process, such as a primary charger, a developing device, a transfer electrode, a separating device, and a cleaning device, are arranged. It is configured to transfer the image onto a transfer material, send the transfer material to a fixing device 29, fix it, and send it out of the machine. A large number of LEDs 27 are arranged in the axial direction of the photoreceptor drum 30 corresponding to the length of the photoreceptor drum 30 so that the next position slightly distant from the imaging position of the original image on the photoreceptor drum 30 can be illuminated. There is.

Lenses 14 to 1 are on the optical path of the reflected light from the 8th optical system 6.
6 are provided horizontally in the depth direction of the drawing in FIG.
An image is formed on top and converted into an electrical signal. CCD19.2
A red filter 17 and a blue filter 18 are provided between the lens 14 and the corresponding lens 14, 16, respectively.

[Description of Signal Processing Unit (Fig. 1)] Fig. 1 is a diagram showing a partial optical path and a schematic configuration of the control unit 7 in the cross-sectional view of Fig. 2, and parts common to Fig. 2 are indicated by the same symbols. There is.

In the figure, 10 to 13 are lens systems 28 from the light source 5, respectively.
The optical path of the light passing through the document table 4 and the optical path of the reflected light from the document on the document table 4 are shown. Lenses 14 to 16 focus reflected light from the original onto corresponding charge-coupled electrons (CCDs) 19 to 21, respectively. 17 is a red filter that blocks red light, and 18 is a blue filter that blocks blue light. CPU
Reference numeral 22 denotes a processing unit (CPU) such as a microprocessor, which controls the entire apparatus in accordance with a control program and data stored in the ROM 23, the flowcharts of which are shown in part in FIGS. 5 and 6.

Reference numeral 24 denotes a memory composed of a RAM or the like, which is used as a work area for the CPU 22 and also stores frame position information (area information) as described later. 25 is CCD
This is a position detection unit that detects area information by comparing the original image information from CCD 19.24 and the original image information from CCD 19.21. 26 is a driver that drives the LED 27.

[Explanation of area specification (Figures 3 and 4)] Figure 3 (A
) is a diagram showing an example of Hara'g431, and Figure 3 (B)
2 is a diagram illustrating an example of specifying a copy area of a document 31. FIG.

An area 36 in FIG. 3(B) is an area of the original 31 to be copied, and the area 36 is specified by writing a frame 32 on the original 31 in red, which has low drum sensitivity.

If you now set the copying machine to the area specification mode and set the document 31 shown in FIG. 3(B) on the document table 4 and read it, the CC
All image data of the document 31 shown in FIG. 3(B) is input to the CPU 22 from D20.

On the other hand, from CCD 19, the red frame 32 in Figure 3 (B)
The image data excluding the image data is input to the CPU 22. These image data are stored separately in corresponding image memory areas of the memory 24, respectively.

When the reading of the original 31 is completed, the difference between the image data input from the CCD 20 and the image data manually input from the CCD 19 is determined. As a result, image data of the frame 32 is obtained. In this way, the position detection section 25 determines the position and length of this frame 32 as dot position information corresponding to the resolution of image data by the CCD 20 and CCD 19.

That is, since the CCDs 19 to 20 are composed of small sensors in which, for example, 120 photoelectric conversion electrons are lined up in the depth direction perpendicular to the plane of the paper in FIG. It has resolution.

Regarding the document feeding direction (left-right direction in FIG. 2), the resolution is determined by the movement pitch of the eight-fold optical system 6.

Next, the operation during copying will be explained.

Next, the original 31 is placed on the original table 4 again and scanned. At this time, the central processing unit (CPU) 22 retrieves the position information of the frame 32 previously stored in the memory 24, and determines the lighting range of the LED 27 in accordance with the position information from the position detection unit 25 in each scanning room. instruct. For example, if it is detected that the frame 32 in FIG. driver 2
6 for exposure.

That is, when the sub-scanning direction is in the direction of arrow E in FIG. 3(B), in the sub-scanning range 33.35 outside the frame 32, all the LEDs 27 are lit, and in the scanning range 34 of the frame 32, the LEDs 27 are lit outside the frame 32. Only the part 37.39 corresponding to is lit. As a result, only the latent image of the area 36 designated by the red frame is formed, and copying only within the area 36 becomes possible.

4(A) and 4(B) show the case of specifying the area of the document 40 that you do not want to copy, using blue color with low drum sensitivity to surround the area 42 that you do not want to copy. Write in box 41. When this original 40 is placed on the original table 4 and read, the CP is read from the CCD 20 as in the case described above.
All image data of the document 40 shown in FIG. 4(B) is input to U22, and the image data excluding the red frame 41 of the document 40 is manually input from the CCD 21. These image data are each stored in the memory 24, and the position detection section 25 calculates the difference between them. In this way, the position of the red frame 41 on the document is detected and stored in the memory 24.

When copying this original 41, the original 41 is placed on the original table 4 and scanned. At this time, sub-scanning in the F direction is performed based on the position information in the memory 24, and all the LEDs 27 are turned off in the area indicated by 43.45. Next, in the region 44, only the portion of the LED 27 corresponding to the region 47 in the main scanning direction is turned on and exposed. This erases only the area 42 and prevents it from being copied.

[Description of Area Designation Processing (FIG. 5)] FIG. 5 is a flowchart showing area reading processing.

This program is started by an area reading instruction from a switch or the like (not shown). First, in step S1, CCD 1
The image data of the original read in steps 9 to 21 is stored in the memory 2.
4 are stored in corresponding image storage areas. In step S2, the image data is transferred to the position detection section 25, and the difference between each image data is determined. This difference corresponds to the frame 32 or frame 41 shown in FIGS. 3(B) and 4(B), for example.

In step S3, it is checked whether there is a difference between the image data, and if there is a difference, the process proceeds to step S4, and the difference is determined by the CCD2
Image data read by 0 and CCD19 or C
Check whether there is a difference with CD20, that is, whether the frame is written in red or blue. When the frame is red, the area within the frame is designated as the area to be copied, so copy area information (or non-copy area information) is created and stored in the memory 24 in step S5.

When the frame is blue, the process proceeds to step S6, where non-copy area information is created with the area surrounded by the frame as a non-copy area, and is stored in the memory 24.

[Explanation of copying process (Figure 6)] FIG. 6 is a flowchart of the copying process of the embodiment.

This program is started by pressing a start switch instructing the start of copying, and driving of the moving optical system 6 is started in step S10. CCD20 in step sit
The image data of the original is manually input and the scanning position of the original image in the sub-scanning direction is detected. In step S12, it is checked by referring to the non-copying area information in the memory 24 whether there is a non-copying area (portion not to be copied) at the sub-scanning position currently being scanned.

If there is a portion that is not to be copied at the current sub-scanning position, the process proceeds to step SL3, the area that is not to be copied is detected by referring to the non-copy area information in the memory 24, and the portion of the LED 27 that corresponds to the non-copy area is lit. Expose. On the other hand, step S
If there is no non-copy area at the sub-scanning position in step 12, step 14
, and turn off all LEDs 27. In step S15, it is checked whether copying of one original sheet has been completed, and when it has been completed, the process proceeds to step 316, waits for a predetermined time, and then in step S17, all the LEDs 27 are turned off and the process ends.

Ru.

As explained above, according to this embodiment, by writing a frame on a document using a color with low photosensitivity and specifying an area to be copied or an area not to be copied, it is possible to easily specify an area and make a copy. It can be carried out.

Furthermore, since the frame uses a color with low photosensitivity, it will not be copied.

Furthermore, as shown in FIG. 7, by writing a red frame 71 and a blue frame 72 on the original 70, it is of course possible to copy only the shaded area 73.

Note that although the frame for specifying the area in this embodiment is shown as a rectangle, it is not limited to this, and may be any curved line. Further, the designation of the color is not limited to blue or red as in this embodiment, but may be any color having low photosensitivity.

[Effects of the Invention] As described above, according to the present invention, there is an effect that a copy area can be specified easily and accurately.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of the control unit section and part of the optical path of the electronic copying machine of the embodiment, FIG. 2 is a schematic sectional view of the electronic copying machine of the embodiment, and FIG. 3 (A
), Figure 4 (A) are diagrams each showing an example of the manuscript, Figure 3 (B) and Figure 4 (B) are Figure 3 (A), respectively.
FIG. 4(A) is a diagram showing an example of specifying the copy area and non-copy area of a document, FIG. FIG. 7 is a flowchart of the copying process for the designated original document, and is a diagram showing another example of area designation. In the figure, 4... document table, 6... moving optical system, 7...
Control unit, 10-13... Optical path, 14-16...
・Lens, 17...Red filter, 18...Blue filter, 19-21...CCD, 22...-CPU,
23... ROM125... Memory, 25... Position detection section, 26... Driver, 27... LED, 30
. . . Photosensitive drum, 31. 41 . . . Original document. (D C'7A'S3
Diagram 4th factor

Claims (3)

[Claims] (1) An image forming apparatus that photoelectrically reads a document image and forms an image of the document image, the device comprising: a detection means for detecting an area designated by a predetermined color on the document; and image formation within the area. and prohibiting means for prohibiting image formation outside the area. (2) A patent characterized in that the detection means includes recognition means for recognizing the type of color, and the prohibition means prohibits image formation within or outside the area in accordance with the type of color. An image forming apparatus according to claim 1. (3) The inhibiting means includes an exposing means provided behind the photosensitive position of the photosensitive drum, and the exposing means exposes the photosensitive drum in accordance with the area where image formation is prohibited according to the instruction from the detecting means. An image forming apparatus according to claim 1 or 2, characterized in that: