JPH03136175A - Picture rotating and expanding processor - Google Patents

Abstract

PURPOSE:To shorten the processing time of the rotation processing accompanied with expansion of picture information or character font by expanding it in accordance with the magnification preliminarily designated by an external control part. CONSTITUTION:At the time of the start of rotation and expansion processing of picture information, an external control part 1 sets an angle of rotation (90 deg., 180 deg., or 270 deg.) and an expansion rate to a control part 6 as operation parameters, and thereafter, the external control part 1 transfers a rotation and expansion processing object area from a picture memory 7 to a picture storage part 3. A rotation processing part 4 rotates picture information inputted to the picture storage part 3 in accordance with the angle of rotation designated by the control part 6. Consequently, rotation results are generated in the output of the rotation processing part 4 (the input of an expansion processing part 5) at the time of the end of transfer to the picture storage part 3. The expansion processing part 5 refers to the expansion rate designated by the control part 6 and the read address of rotation expansion processing results from the external control part 1 to output data to an external bus 2. Thus, the processing time of rotation processing is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image rotation/enlargement processor in an image editing device or electronic filing device that handles image information as an electrical signal quantized into 0s and 1s.

[Conventional technology]

Conventionally, when performing rotation processing that involves enlarging image information or character fonts, the following method has been used.

(1) Software method Data is read into a register in the processor, and rotation and enlargement processing is performed by bit manipulation.

(2) Hardware method A rotation processor and an enlargement processor that perform 90°, 180@, and 270' rotations are operated individually, and the rotation process is first performed and then the enlargement process is performed.

This method will be further explained with reference to FIG.

The external control unit first transfers the image information 11 to be processed to the rotation processor. As a result, a rotation result 12 is generated, and subsequently the external control unit transfers this rotation result 12 to the enlargement processor. As a result, the enlargement process is executed, and the external control unit obtains the rotation/enlargement process result. FIG. 3 shows the movement of image information during this process on the memory map of the external control section. That is, the transfer by the external control unit is as follows: processing target area → rotation processing manual buffer 21 → rotation processing output buffer 22 (rotation processing storage area) → enlargement processing manual buffer 23 → enlargement processing output buffer 24 → enlargement/rotation processing storage area. It is done in order. Note that this processing is executed in the order of rotation → enlargement, taking processing time into account.

[Problem to be solved by the invention]

When performing the above-mentioned rotation/enlargement processing, the software method requires processing time for calculation, and even when the hardware method is used, it takes time to write image information to the rotation processor and read the rotation processing results. In addition, it is necessary to write the image information (rotation processing result) to the enlargement processor and read the enlargement processing result, which increases the processing time.

[Means to solve the problem]

The image rotation/enlargement processor according to the present invention includes an image storage unit that stores N-bit x N-bit image information input from an external bus, and an external control unit that stores the image information stored in the image storage unit. a rotation processing unit that rotates by 90 degrees, 180 degrees, or 270 degrees according to the settings of the rotation processing unit; and means for enlarging the processing result of the rotation processing unit according to a magnification specified in advance by the external control unit when the external control unit reads the processing result. It is equipped with

〔Example〕

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

FIG. 1 is a block diagram of one embodiment of the present invention.

In this embodiment, as shown in FIG. 2, the operation will be described when 16 bits x 16 bits of image information is rotated by 90 degrees and further enlarged by 4 times.

The external control unit 1 is a processor that uses an external bus 2 to control image rotation/enlargement processing and transfer image information. External bus 2 is under the control of external processor 1,
This bus contains addresses, data, and control signals for supplying operating parameters and image information to the parts that perform image rotation and enlargement processing. Further, the image memory 7 is assigned on the memory map of the external control unit 1 as an image memory that includes a target area for rotation/enlargement processing and a storage area for processing results.

When starting the image information rotation/enlargement process, the external control unit 1 first inputs the rotation angle (9
0 degrees, 180 degrees, or 270 degrees) and set the magnification rate. After setting the operating parameters, the external control section 1 transfers the rotation/enlargement processing target area from the image memory 7 to the image storage section 3.

The rotation processing section 4 is constituted by a gate such as a selector, and rotates the image information input to the image storage section 3 according to a rotation angle specified by the control section 6. Therefore, when the external control unit 1 finishes transferring the rotation/enlargement processing target area from the image memory 7 to the image storage unit 3, the output of the rotation processing unit 4 (input of the enlargement processing unit 5) includes the rotation result ( Image information corresponding to the rotation result 12 in FIG. 2) has been generated.

The enlargement processing section 5 is composed of a gate, and the control section 6
This is a means for outputting data to the external bus 2 by referring to the enlargement ratio specified by and the address for reading the rotation/enlargement processing results from the external control section 1.

In this way, the image rotation/enlargement processor according to the present invention
Output processing results to external bus.

FIG. 4 shows the transfer of image information during this operation on the memory map of the external control section 1. That is, the external control unit 1 rotates the rotation/enlargement processing target area→rotation/enlargement processing manual buffer 31→rotation/enlargement processing output buffer 32→rotation/enlargement processing
Transfers the enlargement processing result storage area.

〔Effect of the invention〕

As explained above, the image rotation/enlargement processor according to the present invention includes an image storage unit that stores N-bit×N-bit image information input from an external bus, and an image storage unit that stores the image information stored in this image storage unit. A rotation processing section that rotates 90 degrees, 180 degrees, or 270 degrees according to settings from the external control section, and means for enlarging the processing results of the rotation processing section according to a magnification specified in advance by the external control section when the external control section reads them. When performing rotation processing that involves enlarging image information or character fonts, the external control unit transfers the source area to the processor, receives the - degree rotation result, and
Rotation processing accompanied by enlargement can be performed without transferring the image to the enlarger, and processing time can be shortened.

12...Rotation result, 13...Rotation/enlargement result, 21
. . . Rotation processing human power buffer, 22 . . . Rotation processing unit Kakku Nofa, 23 .
. . . Enlargement processing output buffer, 31 . . . Rotation/enlargement processing person cover/enfa, 32 . . . Rotation/enlargement processing output buffer.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a diagram showing the movement of image information when image information is rotated 90 degrees and the result is enlarged four times, and Fig. 3 is an image FIG. 4 is a diagram showing the movement of image information on the memory map of the external control unit when performing rotation processing accompanied by information expansion in the case of the conventional example. This is a diagram.

Claims (1)

[Claims] An image storage unit that stores N-bit×N-bit image information input from an external bus;
a rotation processing unit that rotates by 180 degrees or 270 degrees, and means for enlarging the processing result of the rotation processing unit according to a magnification specified by the external control unit in advance when the external control unit reads the processing result. Featured image rotation/
Enlargement processor.