JPH01226083A - Rotation processor for image data - Google Patents

Abstract

PURPOSE:To shorten a processing time by writing image data to be rotated in one rotation processing part out of two, reading out rotated image data of previously written image data from the other rotation processing part simultaneously with said writing and writing the read data in a storage part. CONSTITUTION:When a control part 4 reads out image data 2 to be rotated from a storage part 2, the image data 2 to be rotated is outputted to a bus 5. At that time, a rotation control part 6 writes the image data 2 to be rotated in a rotation processing part 7 by utilizing a reading signal of the control part 4 and simultaneously outputs the rotated image data of the previously written image data from the rotation processing part 8 to a bus 7. Then the control part 4 writes the image data read out of the 2nd rotation processing part 8 in the storage part 1. Thus, the rotation processing of one reading/writing unit of the image data can be executed by said reading/writing operation. When the reading/writing operation is continuously executed, the image data 2 to be rotated are written in a rotation processing part 7 and the image data rotated by the rotation processing part 8 are written in the storage part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to image data processing, and particularly to an image data rotation processing apparatus.

[Conventional technology]

In a conventional image data processing device, there is a storage unit that stores image data to be rotated and image data after rotation, a control unit that reads and writes image data in the storage unit, and a control unit that processes image data between the storage unit and the control unit. An image data processing device constituted by a bus that acts as an intermediary has an image data storage means and a rotation processing section that performs rotation processing of the image data.

[Problem that the invention seeks to solve]

However, in the conventional image data processing device mentioned above,
When processing image data rotation.

First, the control unit reads image data to be rotated from the storage unit and writes it to the 9th rotation processing unit.

Image data that has been subjected to two rotations by the rotation processing section is read from the rotation processing section and written to the storage section.

In other words, the image data for one rotation is transferred from the storage unit to the rotation processing unit, and the image data after rotation is further transferred from the rotation processing unit to the storage unit, so two transfer processes are required, which takes processing time. There is a drawback.

Therefore, in view of the above-mentioned drawbacks, it is a technical object of the present invention to provide an image data rotation processing device that can reduce the number of image data transfers and shorten the processing time when performing 9-rotation processing. .

[Failure to solve the problem]

According to the present invention, there is provided a storage unit that stores image data subject to nine rotations and image data after rotation, and a control unit that reads and writes image data in the storage unit.

a first bus that mediates image data between the storage unit and the control unit; first and second rotation processing units that have image data storage means and perform rotation processing of the image data;
a rotation control unit that controls the first and second rotation processing units; a second bus that mediates rotated image data between the first and second rotation processing units and the control unit; When performing a read operation, the control unit reads image data to be rotated from the storage unit onto a first bus, and writes the image data to one of the first and second rotation processing units. At the same time, there is obtained an image data rotation processing device characterized in that image data after rotation of image data written in advance from the other rotation processing section is read out onto a second bus and written into the storage section. .

〔Example〕

Next, one embodiment of the present invention will be explained with reference to the drawings.

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

The storage unit 1 stores image data 2 for one rotation and image data 3 after rotation, and the control unit 4 stores.

Image data is read and written between the control section 4 and the storage section 1 through the first bus 5.

When performing one rotation process, the control section 4 reads image data 2 to be rotated from the storage section 1 and writes image data 3 after two rotations.

First, when the control section 4 reads out the image data 2 to be rotated from the storage section 2, the image data 2 to be rotated nine times is output to the first bus 5. At this time.

The rotation control unit 6 uses the readout signal from the control unit 4 to write image data 2 for five rotations into the first rotation processing unit 7, and at the same time writes the image data 2 for five rotations from the second rotation processing unit 8. The image data after data rotation is transferred to the second
output to bus 7 of

Normally, when reading image data, the control unit 4 reads the image data output to the first bus 5. However, when one rotation process is involved, the control unit 4 reads the image data output to the first bus 5.
Read out the rotated image data output to.

Therefore, when two-rotation processing is involved, the control section 4 can read image data that has been processed six rotations by simply performing a readout operation.

Next, the control section 4 writes the image data read from the second rotation processing section 8 into the storage section 1 .

Through the reading and writing described above, image data is rotated by -read/write units.

By reading and writing continuously.

Image data 2 to be rotated is written to the first rotation processing section 7 , and image data subjected to rotation processing by the second rotation processing section 8 is written to the storage section 1 . Rotation processing section 7
When writing of image data for one processing unit is completed,
The two rotation processing units 7-8 switch between writing and reading, and when reading and writing are performed successively, the image data read from the storage unit 1 is written to the second rotation processing unit 8 and simultaneously transferred to the second rotation processing unit 8. The rotationally processed image data is read from the rotation processing unit 9 of the first rotation processing unit 1 and written to the storage unit 1.

〔Effect of the invention〕

As explained above, in one aspect of the present invention, when performing a read operation, the control section reads image data to be rotated from the storage section onto the first bus, and transfers the image data to one of the first and second rotation processing sections. At the same time, the image data after rotation of the image data written in advance is read from the other rotation processing section onto the second bus, and the image data is written into the storage section. Therefore, the number of image data transfers when performing two-rotation processing is halved, which has the effect of shortening processing time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an image rotation processing apparatus according to an embodiment of the present invention. 1...Storage unit, 2...Image data to be rotated. 3... Image data after rotation, 4... Control unit, 5
...first bus, 6...rotation control section, 7...first
rotation processing unit, 8... second rotation processing unit, 9... second nox.

Claims (1)

[Claims] (1) A storage section that stores image data to be rotated and image data after rotation, a control section that reads and writes image data in the storage section, and a first section that mediates image data between the storage section and the control section. a bus; first and second rotation processing units that have image data storage means and perform image data rotation processing; a rotation control unit that controls the first and second rotation processing units; a second bus that mediates rotated image data between the first and second rotation processing units and the control unit; image data of the first bus is read out to the first bus;
At the same time, the rotated image data of the previously written image data is read out from the other rotation processing section to the second bus, and is stored in the storage section. An image data rotation processing device characterized by writing.