JPH01172893A - Image processor - Google Patents

Abstract

PURPOSE:To use one memory for the multi-purpose by a simple circuit constitution by providing a selector for switching a signal with respect to an image input part at the time of executing write and read-out of image data from a system data bus to a memory. CONSTITUTION:The processor is provided with a selector 13 for switching image data displayed on a display part 3 in accordance with graphic data and character data, and selectors 14, 15 for switching a signal with respect to an image input part 1 at the time of executing write and read-out of the image data from a system data bus 16 to a memory 10. In this state, write and read- out of the data from the image input part 1 side and the system data bus 16 side are executed with respect to one memory 10. In such a way, one memory 10 can be used for the multi-purpose by a simple circuit constitution, and also, a graphic display and a character display can be easily switched.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device that displays images using a memory in which data can be written and read.

[Conventional technology]

When displaying an image manually generated from a camera or the like on a monitor, for example, on a television, the image data may be temporarily stored in memory, or when the image is divided into graphic data and character data and displayed separately. There is. In such a case, it is necessary to provide a memory suitable for each purpose, or to control a single memory by providing a signal changeover switch.

[Problem that the invention seeks to solve]

Conventional image processing devices have a problem in that when one memory is used for multiple purposes as described above, one circuit configuration becomes complicated.

The present invention has focused on these problems and aims to provide an image processing device that can use one memory for multiple purposes with a simple circuit configuration.

[Means for solving problems]

The image processing device of the present invention includes a memory in which image data can be rewritten, an image display section that displays the image data written in the memory from an image input section, etc., and a graphic display section that displays the image data displayed on the display section. A selector is provided for switching between data and character data, and a selector is provided for switching between the image input section and the signal when writing and reading image data from the system data bus to and from the memory.

[Effect]

In the image processing apparatus of the present invention, a simple circuit provided with each selector for signal switching controls the writing and reading of data in one memory by a program or the like.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.
This device is composed of an image input section 1, a data processing section 2 that processes image data, and an image display section 3 that displays the processed image data.

In FIG. 1 above, 4 is a camera, 5 is a controller that controls this camera 4, 6 is a binarization circuit that performs analog-to-digital conversion of the image signal from the camera 4 and outputs a binarized signal, and 7 is a An address generation circuit that generates an address signal synchronized with the signal from the controller 5, an address switching circuit 8 that switches the address signal between graphic data and character data, and 9 converts the signal from the binarization circuit 6 from parallel to serial. conversion circuit, 10
is a memory (RAM) in which image data can be rewritten, 1
1 is a character generator that generates character data from the outputs from this memory 10 and the address switching circuit 8; 12 is a conversion circuit that converts the signals from the character generator 11 and the memory 10 from parallel to serial; 13 is a display A selector 14.15 switches the image data displayed on the section 3 between graphic data and character data, and 14.15 switches the signal with the image input section 1 when writing and reading image data from the system data bus 16 to the memory 10. A selector 17 is a video signal synthesis circuit that synthesizes a video signal from the output signal of the conversion circuit 12, and 18 is a monitor that displays an image in accordance with the video signal.

Next, the operation will be explained.

(b) When writing image data, the data output from the camera 4 through the binarization circuit 6 is converted from serial to parallel by the conversion circuit 9, and stored in the memory 10 as parallel data matching the bit length of the memory 10. Write according to the generated address. At this time, the selectors 14 and 15 are switched to the image input side, and the switching circuit 8 and selector 13 are switched to the graphic side.

(b) When displaying image data, the data read out from the memory 10 at an address generated in synchronization with the controller 5 is subjected to parallel-to-serial conversion by the conversion circuit 12 and output to the video signal synthesis circuit 17. At this time, selector 1
4.degree. 15 is the image input/output side, and the switching circuit 8 and selector 13 are switched to the graphic side.

(c) When displaying character data, controller 5
The data (character code) read out from the memory lO at the address generated in synchronization with is input to the character generator 11, and the character generator 11
A conversion circuit 12 converts the data from parallel to serial and outputs it to a video signal synthesis circuit 17.

At this time, the selectors 14 and 15 are switched to the image input/output side, and the switching circuit 8 and selector 13 are switched to the character side.

(iv) When accessing the system data bus, reading and writing of image data and writing of character codes are performed according to addresses from the system data bus 16. At this time, each selector 14, 15 is switched to the system bus side.

In this way, data can be written and read from the image input unit side and the system data bus side in one memory 1.
Performed for 0.

In this case, using this one memory 10 for multiple purposes can be easily done by a program or the like. Further, the circuit configuration is simple, and switching between character display and graphic display can be easily realized.

〔Effect of the invention〕

As described above, according to the present invention, one memory can be used for multiple purposes with a simple circuit configuration, and switching between graphic display and character display is also facilitated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1------Image input unit 2------Data processing unit 3---------Image display unit 8------Address switching circuit 10---Memory 11---Character generator 13, 14
．． 15 ---- Selector 16 ---- System data bus Applicant Stanley Electric Co., Ltd.

Claims (1)

[Claims] A memory in which image data can be rewritten, an image display section that displays the image data written in this memory from an image input section, etc., and a selector that switches the image data displayed on this display section between graphic data and character data. An image processing device comprising: a selector for switching signals with the image input section when writing and reading image data from a system data bus to and from the memory.