JPH0426273A - Image processor - Google Patents

Abstract

PURPOSE:To register a new dot pattern with a simple operation by using the image reading mechanism of a copying machine as it is when performing registration, and storing a dot pattern plotted on an original when dot meshing and dot placement are performed by using the new dot pattern other than an existing dot pattern. CONSTITUTION:Output from a CCD 11 is converted to a digital signal at an A/D conversion part 12, and shading correction and MTF correction to correct the unsharpness of an optical system are performed on it at an image signal processing part 13, and it is binarized with a prescribed threshold, and is outputted to an image editing part 14. At the image editing part 14, processing for the dot meshing or the dot placement, etc., is performed on an original image by data from a RAM 15. Furthermore, a dot pattern RAM 16 in which the dot pattern desired to register newly is stored is provided other than the dot pattern ROM, and the original of dot pattern generated newly is read by using the image sensor 11, and a converted electrical signal is written on the RAM 16. Thereby, the registration of the new dot pattern can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device for storing a read image in a memory as a halftone pattern in a digital copying machine.

[Conventional technology]

Digital copying machines can perform image processing such as enlarging, reducing, and masking by reading the original image with an image sensor, etc., and performing various processing on the image signal. So-called shading, so-called shading, is applied to the wing parts or background parts of letters etc. to make them appealing.
A pattern is placed in a net shape called netose.

This pattern can be selected from a plurality of predetermined patterns.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the meshing and mesh pattern can be selected from among multiple mesh patterns, but even if the user wants to use his own mesh pattern, he cannot register a new mesh pattern. There wasn't.

The present invention solves the above-mentioned drawbacks of the prior art, and makes it possible to register a new mesh pattern by setting an original with a new mesh pattern to be registered on a contact glass and performing a simple operation similar to a normal copying operation. The purpose is to

[Means to solve the problem]

The above purpose is to read a document image using an image sensor, convert it into an electrical signal, and obtain input image data.
In an image processing device that shades and overlays a document image with an arbitrary pattern from among a plurality of patterns stored in advance in a screen pattern memory, the screen pattern document data that is read by an image sensor and that is to be newly registered is read by an image sensor. This is achieved by providing a storage means for writing and registering new mesh patterns.

[Effect]

A new mesh pattern can be registered by reading an original of a newly created mesh pattern using an image sensor and writing the converted electrical signal into a storage means such as a RAM that can be written and erased.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 6 shows a general document reading device.

The light emitted from the light source 1 is irradiated onto the original 3 on the contact glass 2, and the reflected light from the original 3 is reflected by the mirrors 4, 5, .
6 and a lens 7 to form an image on the light receiving surface of the image sensor 8. Further, the light source 1 and the mirror 4 are supported by a traveling body 9 that moves in the sub-scanning direction, while the mirror 5.6 is supported by a traveling body 9 that moves in the sub-scanning direction at 1/2 speed in conjunction with the traveling body 9. 10, and by moving the optical system, the image surface of the document is scanned in the sub-scanning direction.

In addition, the resolution of image reading in this example is 16
pixel/mm, and can read up to A3 size originals. Therefore, A3 size (297mm x 42
In order to read the short side of 297 mm >0 mm in the main scanning direction, a 5000-pixel CCD image sensor is used as the image sensor 8.

FIG. 1 is a block diagram of an image processing apparatus according to an embodiment of the present invention.

The output from the CCD II (corresponding to the image sensor 8 in Fig. 6) is converted into 6 bits (641i1 scale) by the A/D converter 12.
is converted into a digital signal. After that, the image signal processing section 1
In step 3, shading correction is performed to correct uneven illuminance of the light source, variations in image sensor sensitivity, etc., and MTF correction is performed to correct blurring of the optical system. be done.

The image editing section 14 performs processing such as hatching or overlaying the original image based on the data from the mesh pattern ROM 15. Several kinds of mesh patterns are written in the mesh pattern ROM 15 in advance, and any desired mesh pattern can be selected.

In this embodiment, in addition to the network pattern ROM, a network pattern RAM (storage means) 16 is provided to store a network pattern to be newly registered.

The image signal processing section 13, image editing section 14, mesh pattern ROM 15, mesh pattern RAM 16, etc. are controlled by the system control section 17.

Next, a method for registering a network pattern will be explained.

In this embodiment, a document containing a figure that will be the basis of a newly registered mesh pattern is set and the pattern registration mode is set. Then, when a start key (not shown) is pressed, the image signal read by the CCDII is processed by the image processing section 13, further reduced to 64×64 pixels in this example, and stored in the mesh pattern RAM 16.

Here, the method of reduction is to count the number of input pixels,
The image data is transferred to the mesh pattern RAM 16 at regular intervals.
There is a way to load it into.

In this embodiment, the shaded area in Fig. 5 is the reading position (64mm
(li 4 mm), image data is read every 16 pixels. An example of the circuit diagram is shown in FIG.

In FIG. 2, 18 is a DQ flip-flop, 19 is an X counter, 20 is a Y counter, 21 is a counter, and 22
is a network number manual section, in which the coordinates of the network pattern to be registered are determined by an X counter 19 and a Y counter 20, and the data is stored in the network pattern RAM 16.

Furthermore, since the above-mentioned mesh pattern registration method cannot utilize the data of all pixels, there is a method in which, for example, data of 16×16 pixels is averaged and the value is read.

By inputting the network number from the network number manual section 22 at the time of registration, the document can be shaded using any pattern from among the patterns previously registered in the network pattern ROM 15 and newly registered patterns. You can put it on.

FIG. 3 shows an example of the circuit diagram when shaded and shaded.

In FIG. 3, 23 is a decoder, 24 is a parallel/serial converter, and 25 is a selector.

This selector 25 selects a network pattern registered in advance in the network pattern ROM 15 or a network pattern RAM 16.
One of the newly registered network patterns is selected and output.

In the timing chart shown in FIG.
CK, which is a pixel clock, is outputted every 16 clocks by the counter 21, and the logical product with the X5YNC signal is sent to the register. X5YNC indicates the range in which data is valid in the main scanning direction.

The X and Y addresses of the memory 16 are respectively given by the counter 21 and determine the address of the image signal. LSY
NC is a line synchronization signal, and data of one line of the image sensor is read during this period. Note that a nonvolatile RAM can also be used as the network pattern RAM.

〔Effect of the invention〕

As explained above, according to the present invention, when a new mesh pattern is created in addition to an existing mesh pattern and used to shade and overlay, the image reading mechanism of the copying machine can be used as is at the time of registration. Since the net pattern drawn on the original is stored in the storage means, the mechanism and operation are simple, and a large number of patterns can be registered depending on the memory.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an image processing device according to an embodiment of the present invention, FIG. 2 is a circuit diagram of the main part of the image processing device, the mesh pattern RAM section, and FIG. 3 is a diagram showing previously registered mesh patterns and newly registered mesh patterns. FIG. 4 is a timing chart, FIG. 5 is an explanatory diagram showing how a net pattern document is read, and FIG. 6 is a configuration diagram of a boat-based document reading device. 11...CCD, 12...A/D conversion unit, 13...
- Image signal processing section, 14... Image editing section, 15... Net pattern ROM, 16... Net pattern RAM, 17.
...System control unit. Diagram

Claims (1)

[Claims] An image sensor is used to read a document image and convert it into an electrical signal to obtain input image data, and the document image is shaded with an arbitrary pattern from a plurality of patterns stored in advance in a screen pattern memory. What is claimed is: 1. An image processing apparatus comprising: a storage means for writing dot pattern original data read by an image sensor and desired to be newly registered, and registering a new dot pattern.