JPH05204368A - Picture display controller - Google Patents

Abstract

PURPOSE:To increase operation speed by reading corresponding data from a picture memory which is provided separately from a display memory and performing separately each processing and storing it in the display memory. CONSTITUTION:This controller is provided with the picture memory 1 which stores the inputted original picture data 11 in the picture processing circuit separately from the display memory 7, the picture memory writing/reading control circuit 2 which controls writing and reading of the original picture data stored in the picture memory 1 and working means which reads out the original picture data from the picture memory 1 in accordance with control of the picture memory writing/reading control circuit 2 and works it and outputs it to the display memory 7. In this case, the working means include the enlarging processing circuit 3 which enlarges picture size of the original picture data, the reducing processing circuit 4 which reduces picture size of the original picture data, the gradation conversion circuit 5 which converts gradation of the original picture data and the rotation processing circuit 6 which rotates the original picture data.

Description

Detailed Description of the Invention

[0001]

The present invention is used for controlling image display. The present invention relates to an image display control device capable of processing and displaying original multi-valued image data at high speed.

[0002]

2. Description of the Related Art Conventionally, an image display control device of this type has an image processing circuit 101, a display memory 7, a display memory writing / reading control circuit 8, a display signal generating / outputting circuit 9 as shown in FIG. With the original image data 11 and the transfer control signal 21.
Are directly input to the image processing circuit 101, image processing is performed, and then output as the image processing result 102 together with the transfer control signal 103, and the display memory writing / reading control circuit 8 follows the transfer control signal 103 to display memory writing control signal 81. Was output and the image processing result 102 was written in the display memory 7. Further, the display signal creation / output circuit 9 outputs the display data read control signal 91 to the display memory write / read control circuit 8 to output the display memory read control signal 82 and read the display data 71 from the display memory 7. The display signal 92 was created and output.

[0003]

In the above-described conventional image display control device, since the original image data is directly input to the image processing circuit, when the image calculation is repeatedly performed while changing the conditions, the file device is used each time. It is necessary to read the original image data from the device, which causes a problem that the processing speed becomes slow. In addition, since a large amount of data flows from the file device each time the condition is changed, there is a problem that the file device and the system bus are occupied and the throughput of the entire device is reduced.

The present invention solves such a problem, and an object of the present invention is to provide an apparatus capable of performing high-speed processing and improving throughput.

[0005]

According to the present invention, there is provided an image processing circuit for inputting original image data and a transfer control signal to perform image processing, a display memory for writing the image processing result from the image processing circuit, and the image. A display memory write / read control circuit that controls writing and reading to and from the display memory according to a transfer control signal from the processing circuit, and display data from the display memory according to the control of the display memory write / read control circuit. In an image display control device including a display signal generation / output circuit for outputting as a read display signal, an image memory for storing input original image data is provided in the image processing circuit separately from the display memory. Image memory writing / reading control circuit for controlling writing and reading of original image data stored in Characterized by comprising a processing means for outputting to the display memory of the original image data reads processing from the image memory under the control of the control circuit.

The processing means includes an enlargement processing circuit that enlarges the image size of the original image data, a reduction processing circuit that reduces the image size of the original image data, and a gradation conversion circuit that converts the gradation of the original image data. A rotation processing circuit for rotating the original image data, and a changeover switch for switching and outputting the outputs of the enlargement processing circuit, the reduction processing circuit, the gradation conversion circuit, and the rotation processing circuit to the display memory. It is desirable to prepare.

[0007]

The read original image data is stored in the image memory provided separately from the display memory, and is enlarged from the image memory when the image calculation is repeatedly performed while changing the conditions.
Data corresponding to conditions such as reduction, gradation conversion, and rotation are read out, and the data read out by the processing means are individually processed and stored in the display memory.

As a result, it is not necessary to read the original image data from the file device or the like each time, the calculation speed can be increased, and a large amount of data does not flow each time the condition is changed, so that the system bus is exclusively used. The situation is resolved and the throughput of the entire apparatus can be improved.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment of the present invention.

In the embodiment of the present invention, an image processing circuit for inputting original image data and a transfer control signal to perform image processing, and a display memory 7 for writing the image processing result from this image processing circuit.
And a display memory writing / reading control circuit 8 for controlling writing and reading to / from the display memory 7 according to a transfer control signal from the image processing circuit, and a display under the control of the display memory writing / reading control circuit 8. Display signal creation to read display data from memory 7 and output as display signal
An output circuit 9 is further provided, and as a feature of the present invention, an image memory 1 for storing the input original image data is provided in the image processing circuit separately from the display memory 7, and the original image stored in the image memory 1 is provided. An image memory writing / reading control circuit 2 for controlling writing and reading of image data, and original image data is read out from the image memory 1 under the control of the image memory writing / reading control circuit 2 and processed to perform display processing 7 And processing means for outputting to.

The processing means includes an enlargement processing circuit 3 for increasing the image size of the original image data, a reduction processing circuit 4 for reducing the image size of the original image data, and a gradation conversion for converting the gradation of the original image data. It includes a circuit 5 and a rotation processing circuit 6 for rotating the original image data. These processing means are realized by a control circuit and a program installed in the control circuit, which can individually use known techniques.

Further, there is provided a changeover switch 10 for switching the outputs of the enlargement processing circuit 3, the reduction processing circuit 4, the gradation conversion circuit 5, and the rotation processing circuit 6 to the display memory 7 and sending them out.

The image memory 1 stores the original image data 11, the image memory writing / reading control circuit 2 controls writing and reading of the image memory 1, and the enlargement processing circuit 3 outputs the original image data from the image memory 1. The image size of 12 is enlarged. The reduction processing circuit 4 reduces the image size of the original image data 12, and the gradation conversion circuit 5 reduces the original image data 1.
The conversion processing of the gradation characteristics of No. 2 is performed, and the rotation processing circuit 6 performs the rotation processing of the original image data 12 in the image direction.

Further, the display memory 7 stores the display data and selects one of the outputs of the enlargement processing circuit 3, the reduction processing circuit 4, the gradation conversion circuit 5 and the rotation processing circuit 6 with the changeover switch 10. Input and write to display memory
The read control circuit 8 controls writing and reading of the display memory 7, and the display signal creation / output circuit 9 creates a display signal 92 from the display data 71 output from the display memory 7.
Output.

Next, the operation of the embodiment of the present invention will be described. The input original image data 11 is written in the image memory 1 by the image memory writing control signal 22 output from the image memory writing / reading control circuit 2 in accordance with the transfer control signal 21 input at the same time.

When the change-over switch 10 selects the enlargement data 32 from the enlargement processing circuit 3, the enlargement processing circuit 3 sends to the image memory writing / reading control circuit 2 the enlargement reading control signal 31 according to the enlargement ratio. The image memory writing / reading control circuit 2 outputs the image memory reading control signal 23 corresponding to the enlargement reading control signal 31 to read the original image data 12 at the position corresponding to the enlargement ratio from the image memory 1. It is input to the enlargement processing circuit 3, is subjected to enlargement processing, and is output as enlarged data 32.

Further, the enlargement processing circuit 3 outputs the display memory transfer control signal 33, and the display memory writing / reading control circuit 8 is provided.
To output the display memory write control signal 81 to the display memory 7 and the enlarged data 32 selected by the changeover switch 10.
Write A display read request signal 91 is output from the display signal creation / output circuit 9, and the display memory write / read control circuit 8 is output.
Is converted into a display memory read control signal 82, the display data 71 is read from the display memory 7, and converted into a display signal 92 by the display signal creation / output circuit 9 for output.

When the change-over switch 10 selects the reduced data 42 from the reduction processing circuit 4, the reduction processing circuit 4 sends the reduction read control signal 41 to the image memory writing / reading control circuit 2 according to the reduction rate. And the image memory writing / reading control circuit 2 outputs the image memory reading control signal 23 according to the reduced reading control signal 41.
The original image data 12 at a position corresponding to the reduction ratio is read out and input to the reduction processing circuit 4 and subjected to reduction processing to obtain the reduced data 42.
Is output as.

Further, the reduction processing circuit 4 outputs the display memory transfer control signal 43 to control the display memory writing / reading control circuit 8 and outputs the display memory writing control signal 81 to switch to the display memory 7. The reduced data 42 selected by the switch 10 is written.

When the changeover switch 10 selects the gradation conversion data 52 from the gradation conversion circuit 5, the gradation conversion circuit 5 directly reads the image data to the image memory writing / reading control circuit 2. Read control signal 51 for controlling
And the image memory writing / reading control circuit 2 outputs the image memory reading control signal 23 corresponding to the simple reading control signal 51.
Is output, the original image data 12 as it is from the image memory 1 is read out and input to the gradation conversion circuit 5 and output as gradation converted data 52 which has been gradation converted.

The gradation conversion circuit 5 further outputs the display memory transfer control signal 53, controls the display memory writing / reading control circuit 8 to output the display memory writing control signal 81, and switches to the display memory 7. The gradation conversion data 52 selected by the switch 10 is written.

When the changeover switch 10 selects the rotation data 62 from the rotation processing circuit 6, the rotation processing circuit 6 sends the rotation reading control signal 61 to the image memory writing / reading control circuit 2 according to the rotation angle. The image memory writing / reading control circuit 2 outputs the image memory reading control signal 23 according to the rotation reading control signal 61.

As a result, the original image data 12 at a position corresponding to the rotation angle is read from the image memory 1 and the rotation processing circuit 6 is read.
Is input to and output as rotation data 62 that has been subjected to rotation processing.

In the rotation processing circuit 6, the display memory transfer control signal 63 is output to control the display memory writing / reading control circuit 8 and the display memory writing control signal 81 is output to switch the display memory 7 to the changeover switch 10. Rotation data 62 selected by
Write

[0025]

As described above, according to the present invention, when repetitive image operations are performed under different conditions, the original image data can be read once from the file device, and thereafter, the image data can be read from the image memory. Therefore, it is only necessary to read the data, and therefore the calculation speed can be increased, and since there is no reading from the file device even if the conditions are changed, the file device and the system bus are not occupied, and the throughput of the entire device can be improved. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1 image memory 2 image memory write / read control circuit 3 enlargement processing circuit 4 reduction processing circuit 5 gradation conversion circuit 6 rotation processing circuit 7 display memory 8 display memory write / read control circuit 9 display signal creation / output circuit 10 switching Switch 11, 12 Original image data 21 Transfer control signal 22 Image memory write control signal 23 Image memory read control signal 31 Enlarged read control signal 32 Enlarged data 33, 43, 53, 63 Display memory transfer control signal 41 Reduced read control signal 42 Reduced data 51 Simple read control signal 52 Grayscale conversion data 61 Rotation read control signal 62 Rotation data 71 Display data 81 Display memory write control signal 82 Display memory read control signal 91 Display read request signal 92 Display signal

Claims (3)

[Claims] 1. An image processing circuit for inputting original image data and a transfer control signal to perform image processing, a display memory for writing an image processing result from the image processing circuit, and a transfer control signal from the image processing circuit. Therefore, a display memory write / read control circuit for controlling writing and reading to the display memory, and a display signal for reading display data from the display memory as a display signal under the control of the display memory write / read control circuit. In an image display control device including a creation / output circuit, the image processing circuit is provided with an image memory for storing input original image data, separately from the display memory, and the original image data stored in the image memory is An image memory writing / reading control circuit for controlling writing and reading and a control of this image memory writing / reading control circuit Image display control device characterized by comprising a processing means for outputting to the display memory reads processing the original image data from the image memory I. 2. The processing means includes an enlargement processing circuit for increasing the image size of the original image data, a reduction processing circuit for reducing the image size of the original image data, and a gradation conversion for converting the gradation of the original image data. The image display control device according to claim 1, comprising a circuit and a rotation processing circuit for rotating the original image data. 3. The enlargement processing circuit, the reduction processing circuit,
3. The image display control device according to claim 2, further comprising a changeover switch for changing over and outputting the output of the gradation conversion circuit and the rotation processing circuit to the display memory.