JPH0292154A - Picture information reader - Google Patents

Abstract

PURPOSE:To output a 90 deg. rotated picture and an original picture at high speed by providing a second reading means to synchronize with writing to a fourth storing means and scan and read the picture element information in a first direction from a third storing means. CONSTITUTION:Picture element information is scanned in a first direction, alternately written to first and second storing means 3 and 4 by a first writing means 8, synchronizing with this, scanned in a second direction orthogonal to the first direction by a first reading means 8 and the picture element information is read out of a second storing means 4. The picture element information is read out of a first storing means 3, the picture element information read by the first reading means 8 is scanned in the first direction to third and fourth storing means 1 and 2 for one scanning, written by a second writing means 10, synchronized with the writing to a third storing means 1, scanned in the first direction by a second reading means 9 from a fourth storing means 2 and thus, the picture information is read, synchronized with the writing to the fourth storing means 2, scanned in the first direction and the picture element information is read out of the third storing means 1. Thus, the 90 deg. rotated image and the original picture are outputted at the high speed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an image information reading device.

[Prior Art] An image information reading device, for example, a microfilm reader printer for 16 mm roll film 1 is shown in FIG. 2(a).
As shown in FIG. 2, the most common method of use is to arrange an A4 size original, which is the most common original, so that its short side coincides with the longitudinal direction of the film. In the example shown in FIG. 2(b), when considering the orientation of the document information virtually, the documents are arranged so that the top thereof is in the direction of the arrow marked on the left end. In this example, one film has A4 portrait, ^4 landscape, and 83 landscape, but A4 portrait and ^3 portrait are not normally treated as the same group. Among these, it is thought that at least 4 sides are not usually used together.

Manuscripts in the format shown in Figure 2 (C), for example, legal size manuscripts that can be sent to the United States, are produced in the same orientation as the general orientation of F4 size manuscripts. The scanned and read signals are scanned and read on legal size paper (8%" x 14"
'') long side is short side of size 3 paper (・297mm)
Since the image cannot be sent in the same direction as the image, it is necessary to send an image signal obtained by rotating the image by 90 degrees as an image signal for printer output.

In this way, conventional microfilm reader printers, which require the device itself to handle microfilm images to select the image orientation according to the purpose, use optical image rotation and image rotation using an optical system using a CCD. was used as a common method.

Microfilm reader printers that use optical image rotation, such as prism image rotation, have sufficient performance because the magnification side is the size of the document and are high magnification systems, or small-sized CCDs. In an optical system using a sensor, considerable high resolution is required not only on the film side but also on the CCD sensor side, making it difficult to perform prism-type image rotation.

[Problems to be Solved by the Invention] In conventional image information reading devices, even when processing images electrically, after reading image information into an image memory, C
Since the image data is taken into the PU, processed, and then written into the image memory again and then output, there is a problem in that the processing takes too much time.

One way to solve this problem is to increase the processing speed of the CPU, but it requires an expensive CPU just for image conversion.
Had to use PU.

Furthermore, in image conversion, conventional image information reading devices
Since the image on the memory is rewritten by rotating its orientation by 90 degrees, there is a problem in that if the original image is needed, the image information must be read in again.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an image reading device that can output a 90-degree rotated image at a higher speed and also output the original image. .

[Means for Solving the Problem] In order to achieve such an object, the present invention scans pixel information obtained by scanning a still image in a first direction every predetermined number of pixels, and stores the pixel information in the first storage means and the first storage means. a first writing means for writing data alternately into two storage means, and reading pixel information from the second storage means by scanning in a second direction perpendicular to the first direction in synchronization with writing of pixel information into the first storage means; and a first reading means for scanning and reading pixel information from the first storage means in the second direction in synchronization with writing of the pixel information into the second storage means, and pixels read by the first reading means. The information is stored in the third storage means and the fourth storage means for each scan.
a second writing means for scanning and writing in the first direction; and a second writing means for scanning and writing in the first direction; It is characterized by comprising a second readout means that scans and reads out pixel information from the third storage means in the first direction in synchronization with writing to the storage means.

[Function] In the present invention, pixel information obtained by scanning a still image is
The first writing means alternately writes data into the first storage means and the second storage means for each predetermined number of pixels by scanning in the direction, and in synchronization with the writing of pixel information into the first storage means, the first reading means writes the pixel information into the first storage means. The pixel information is read out from the second storage means by scanning in a second direction orthogonal to the first direction, and the pixel information is read out from the first storage means in synchronization with the writing of the pixel information into the second storage means. The pixel information read out by the reading means 1 is transferred to the third storage means and the fourth storage means for each scan.
The storage means is scanned in a first direction and written by the second writing means, and the fourth storage means is scanned in the first direction by the second reading means in synchronization with the writing into the third storage means by the second writing means. The pixel information is read out, and the pixel information is read out from the third storage means by scanning in the first direction in synchronization with the writing into the fourth storage means.

Further, in the present invention, either one of the pixel information read by the first reading means and the pixel information read by the second reading means is taken out to the outside by the switching means.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the invention. In the figure, 13 is an image input section for inputting image information.

Reference numeral 14 denotes an image memory section, which stores image information input from the image input section 13. 15 is the CPU (cen
tral processing unit), which controls the image input section 13, image memory section 14, and image output section 16. The image output section 16 is the image memory section 1
FIG. 2 shows a specific example of the image memory section 13 shown in FIG. 1.

In the figure, 5 is an image memory that stores image information from the image input section 13. Reference numeral 6 denotes an output address generation circuit that generates an output address of the image memory 5. 7 is an input address generation circuit that generates an input address. 3 is 8 x 8 as the first storage means
bit register, 4 is 8 as second storage means
An 8-bit register, 1 is an output buffer RAM as a third storage means, and 2 is an output buffer RAM as a fourth storage means. Reference numeral 9 denotes an output address generation circuit, which generates an output address for the output buffer RAMI,2.

lO is an input address generation circuit, and output buffer RAMI
, 2 input addresses are generated.

8 is a timing generation circuit, which together with the CPU 15 constitutes first writing means and first reading means;
The CPL 115 and the input address generation circuit 10 constitute a second write means, and the cputs and the output address generation circuit 9 constitute a second read means. 11 is an input data path, 12 is an output data bus, 17 is an address bus for image meshing, and 18 is an output buffer RAM address bus. Reference numeral 19 denotes a switch as a switching means, which takes out either one of the pixel information read from the register 3.4 and the pixel information read from the output buffer RAMI, 2 to the outside.

FIG. 3 is a flowchart showing the procedure for reading image information by the CPU 15.

In step S1, image data is read. That is,
Address A1 generated by input address generation circuit 7
8-bit data is stored in the image memory 5 through the data bus 11 in this order as ~An, B, ~Bn1 . . . xIINxnlI.

Then, in step S2, it is determined whether or not to rotate the image, and as a result of the determination, if the image is to be rotated, the process moves to step S3, and in step S3, the image is rotated by 90 degrees. That is, the 8-bit data stored in addresses A1, B3, C1, . . .
Read from image memory 5 in the order of %81 and register 3
is scanned in the first direction to start storage. When the storage of the 8-bit data at address H8 is completed, the register is switched from register 3 to register 4, and the addresses I, J, K, . . . of image memory 5 are stored in register 4.
・Start writing the 8-bit data stored in P. At this time, addresses Il, Jl, Kl,...
・Register 4 of 8-bit data stored in ,P
In synchronization with the writing to , the register 3 is scanned in the second direction, that is, the 8-bit data from the register 3 (a-th to h++), (a+2 to h+2), ..., (a+a to
h1a) is read out in this order, and the read data is stored in the output buffer RAMI according to every (m-8) address generated by the input address generation circuit 10.

When the 8-bit data has been stored in the output buffer RAMI, it switches from register 4 to register 3, starts writing the 8-bit data from the image memory 5 to register 3, and reads out the 8-bit data from register 4. Output 8-bit data buffer RAMI
write to. The write address of the output buffer RAMI at this time starts from R1, R, + (m-8),
R,+2(m-8),...

Thereafter, the 8-bit data in the first column of the image memory 5 is sequentially read out, and the read 8-bit data is written alternately into registers 3 and 4, and the 8-bit data in registers 3 and 4 are
Bit data is read out alternately, and the read 8-bit data is written to the output buffer RAMI.

Then, the 8-bit data of the first column is output to the buffer RAM.
When stored in I, the output buffer RAM is stored in the output buffer R.
Switching is made from the AMI to the output buffer RAM2, and writing of 8-bit data in the second column of the image memory 5 is started in the output buffer RAM2 in the same manner. In step S4, the output buffer RAMI is scanned in the first direction in synchronization with the writing of the 8-bit data in the second column, that is,
8-bit data is read out from the output buffer RAMI according to the address generated by the output address generation circuit 9 and output to the outside.

Thereafter, steps 52 to S5 are repeated, and the 8-bit data in the 3rd column, 4th column, . RAMI, alternately write and read.

Therefore, the image in the image memory 5 is output after being rotated by 90 degrees.

As a result of the determination in step S2, if the image is to be output without being rotated by 90 degrees, the switch 19 is turned on in step s6 to output the images in the registers 3 and 4 to the outside.

On the other hand, for output requests that do not require 90 degree rotation, the image memory input address generation circuit that generates the address at the time of input is enabled and the same address as when manually generated is generated, so that the image as read is output. can be output.

Note that the 90 degree rotation speed of the image is determined by the register 3.4 and the output buffer 1.2 which has the fastest access speed.

[Effects of the Invention] As explained above, according to the present invention, with the above configuration, a 90 degree rotated image can be output at a higher speed, and the original image can also be output. There is an effect.

[Brief explanation of the drawing]

1 is a block diagram showing an image information reading device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the image memory unit 14 shown in FIG. 1, and FIG. 3 is a block diagram showing the image information reading procedure by the CPU 15. Flowchart, FIG. 4 is a diagram showing an example of information recorded on microfilm. 1.2...Output buffer RAM. 3.4...Data register, 5...Image memory, 6...Output address generation circuit, 7...Input address generation circuit, 8...Timing generation circuit, 9...Output address generation circuit , lO...input address generation circuit, 15...cpu. bow, Ω

Claims (1)

[Scope of Claims] 1) first writing means for scanning pixel information obtained by scanning a still image in a first direction every predetermined number of pixels and writing the pixel information alternately into the first storage means and the second storage means; The pixel information is scanned in a second direction orthogonal to the first direction in synchronization with writing the pixel information into the first storage means, and the pixel information is read out from the second storage means, and the pixel information is written into the second storage means. The pixel information is synchronously transferred from the first storage means to the second storage means.
a first readout unit that scans and reads out pixel information in a direction; and a first readout unit that scans and reads out pixel information in
a second writing device that scans and writes in the third storage device and the fourth storage device in the first direction for each scan; and a second writing device that writes pixel information from the fourth storage device in synchronization with writing to the third storage device by the second writing device; It is characterized by comprising a second readout means that scans and reads out the pixel information in the first direction, and that scans and reads out the pixel information from the third storage means in the first direction in synchronization with writing to the fourth storage means. image information reading device. 2) The image according to claim 1, further comprising switching means for extracting either one of the pixel information read by the first reading means and the pixel information read by the second reading means to the outside. Information reading device.