JPS62172864A - Picture reader - Google Patents

Abstract

PURPOSE:To easily obtain a registration picture by attaching a registration function in a read time on a picture reader. CONSTITUTION:An original reader 21 is started to operate, and an original picture is read. Next, one line of the picture data of a read picture is stored serially at line buffers 22 and 23. At a time when the one line of the picture data is stored at the buffers 22 and 23, the buffer is divided logically into two, buffers A and B. At such a time, assuming that the picture data read first is stored at the buffer A, the picture data at the buffer A is sent out to an OR circuit 24. Next, the picture data stored at the buffer B is sent out to the circuit 24. At the circuit 24, a logical sum between the picture data at the buffers A and B is found by every bit, and at the time when the logical sum is obtained, the picture data is outputted. An outputted picture data becomes the one line of the picture data on which two originals are registered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image reading device, and particularly to image editing and overlapping functions during reading.

[Prior Art] Conventionally, this type of device does not have an editing function when reading a manuscript, and can only obtain image data as it is after reading the manuscript. Therefore, in order to obtain the image data of two originals superimposed, it was necessary to cut and paste two originals to create 53 originals, and then read the images from the image using an image reading device. .

[Purpose] The present invention outputs image data by setting two originals on an image reading surface at the same time and reading the images, thereby making it possible to obtain image data of the superimposition of the two originals. be.

[Example] The present invention will be explained in detail with reference to the following examples.

FIG. 1 is a diagram showing a state in which an original is set on the image reading surface of an image reading apparatus in which the present invention is implemented. The reading device electrically scans the image in the main operation direction using a line sensor such as a COD, and performs mechanical scanning in the sub-scanning direction. In FIG. 1, 1 is an image reading surface, 2 is a document A placed on the image reading surface, and 3 is a document B placed on the image reading surface.

FIG. 2 shows a circuit configuration in which the present invention is implemented. In FIG. 2, reference numeral 21 denotes an image flattening device that reads an image line by line using a line sensor and outputs an image signal, and 22
and 23 are buffers capable of storing one line of image data output from the image reading section 21. 24 is an Ok circuit that can calculate the logical sum of two image data stored in the buffers 22 and 23. Further, 25 is a control section that controls reading operation control.

Next, the operation of overlapping image data in the configurations of FIGS. 1 and 2 will be described with reference to the operation flowchart shown in FIG. 3.

As an example, it is assumed that each document in FIG. 1 is an A4 size, and the image reading device is capable of reading up to A3 size.

First, in step S2 in FIG. 3, the document reading device m21 is started in response to a reading start command from the operator, and the width (main scanning direction) of the document read by the line sensor that reads the image of the document is at least document A and document B.
be the sum of In this example, since the document is A4 size, it is read with twice the reading width of A3 size. In step S3, the image data of the read image is serially stored for one line in line buffers 22 and 23 in FIG.

Next, in step S4, when all of the image data for one line has entered the line buffer, the line buffer is logically divided into two, resulting in 22 line buffers A and 23 line buffers B. If it is assumed that the first image data read here is now in line buffer A, step S5
The image data in line buffer A is sent to 24 OR circuits.

The OR circuit 25 holds the image data sent from the buffer A in this manner. Next, in step S6, the image data stored in the buffer B is sent to the OR circuit 24.

The OR circuit 24 calculates the logical sum of the image data already in buffer A and the newly input image data in buffer B for each bit. Once the logical sum has been determined, image data is output in step S7.

The output image data is image data of 1 lines of original A and original B superimposed.

Note that one image weight is 172 of the reading width. By repeating this line-by-line processing several times for A4 size lines, the original A
It is possible to obtain superimposed image data of the document B and the document B.

In the above embodiment, the image data obtained by simultaneously reading two originals was logically summed for each line. A method may also be used in which the logical sum of the data is obtained and one image data is obtained.

[Effect] As explained above, by providing the image reading device with an image superimposition function during reading, there is an effect that it is possible to easily obtain an image of the image of the original document as it is.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a state in which an original is set on the image reading surface of an image reading device according to an embodiment of the present invention; FIG. 2 is a diagram showing an example of a circuit configuration in which the present invention is implemented. FIG. 3 is a flowchart diagram for explaining the operation of the embodiment shown in FIGS. 1 and 2. 1--1 image reading surface, 2-m-original A, 3-m-original 3.21-m -Image reading device, 22 and 23-
--Line buffer. 24---OR circuit.

Claims (1)

[Claims] By reading multiple originals set in the image reading unit during image reading, logically dividing the read image into two, and calculating the sum of the two divided image signals,
An image reading device characterized by outputting an image in which images of multiple originals are superimposed.