JPS5994788A - Image synthesizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is directed to an image synthesis apparatus that includes a display memory, a two-dimensional scanner, and so on.

[Prior art]

Generally, an image compositing device having a frame memory for CRT display uses a frame memory that stores the image before compositing two images.

and Frame Memo Rito, which stores images to be combined.
Frame memo Ih etc. (CR) that stores the combined image
I' Display frame for several pages on both sides.

Memory is required, and the digital images to be composited can be enlarged or reduced at any magnification, and the image quality is high.

It had the disadvantage that it deteriorated significantly.

[Purpose of the invention]

An object of the present invention is to reduce the capacity of display memory.

The image to be reduced to one screen of spray and combined.

It is an object of the present invention to provide an image compositing device capable of obtaining a composite image of good quality even when enlarging or reducing the image.

[Summary of the invention]

A feature of the present invention is that a video signal from a two-dimensional scanner and a video signal of image information stored in a display memory are synthesized by a video signal synthesis circuit, and the synthesized signal is captured as a synthesized signal. The information is read into the display/memory by operating a switch connected to the circuit.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of the entire image synthesis device.

FIG. 2 shows details of the CRT control section, display memory, video signal generation circuit, video signal synthesis circuit, display device, synthesized image capture circuit, and switch section shown in FIG.

3. 1 is a block diagram showing the signal of the 2nd diagram.

It is a time chart showing. Note that the symbols in Figure 3.

Reference numbers 101r to 107r indicate signal waveforms of portions indicated by reference numbers 101 to 107 in FIG.

First, the configuration of this embodiment will be explained with reference to FIG. .

The image information stored in the CRT display frame memory 2 is read out by address designation of the CRT control unit 1, converted into a video signal by the video signal generation circuit 3, and then sent to the video signal synthesis circuit 6. is displayed on the CRT display 7. On the other hand, image 1J on the form to be combined
J10f/;j:, variable magnification.

Video transmission of 2D running with lens using device 4.

The video signal is then converted into a binarized video signal by the binarizing circuit 5, and then converted into a binarized video signal.

The video signal generation circuit 3 in the component signal synthesis circuit 6?

The video signals from the other video signals are combined. This combined video signal I'1 is displayed on the CRT display 7.

It is also sent to the composite image capture circuit 8. The 8 switch section 9 of the composite image acquisition circuit is operated manually.

To create (begin operation 1, composite image information,
Write to frame memory 2 for RT display.

Next, the operation will be explained in detail with reference to FIGS. 2 and 3.

I wonder.

In FIGS. 2 and 3, the CRT control section 1 includes a control circuit 11. Timing generation circuit 12. Memory address counter 13. and memory control 14. The image data stored in the frame memory 2 is read out by the memory address signal 101 generated by the memory address counter 13. The image data signal 102 read from the 7-frame memory 2 is converted into a video signal 103 by the honest data conversion circuit 15 and video generation circuit 16 of the video signal generation circuit 3.

On the other hand, a two-dimensional scanner 4 (see FIG. 1) having a variable magnification optical system is a bidet that outputs a video signal 104° from the video signal generating circuit 3.

This is synchronized with the minute signal 103. The image data 10 (see FIG. 1) on the form that has been photoelectrically converted by the two-dimensional scanning device 4 is converted into a video signal that is binarized by the binarization circuit 5 having a certain predetermined threshold value. It is converted to 104° and sent to the image synthesis circuit 6. image.

fd in the synthesis circuit 6, the 1° video signal 103 from the video signal generation circuit 3, and the video 4g No. 10 from the binarization circuit 5.
4 using oB logic. This image.

A composite video signal 105 (d,
The signal is sent to the CRT display 7 and also to the composite image capture circuit 8.

In this composite image capture circuit 8, the composite video signal 105
After converting into parallel data in the serial-parallel converter circuit 17,
data register 18. The composite image data sent to the data register 18 is not written to the Iri frame memory 2 until the memory write control circuit 19 is activated by operating the switch unit 9. When the memory write control 5 circuit 19 is activated, the composite image data signal 106 output from the data register 18 is routed to the memory address specified by the memory write address signal 107 from the address register 20. This composite image data is written in the CR generated by the timing generation circuit 12.
The process is completed after one cycle of the T vertical synchronizing signal.

According to this embodiment, the frame memory 2 used in the image compositing process can have a capacity equivalent to one screen of the CKT display 7, and no other memory for image compositing is required. In addition, the size of the image on the form 10 to be synthesized can be easily moved by moving the form 10 while looking at the CRT display 7, and the size of the image can also be changed due to the variable size of the two-dimensional scanner 4. The magnification can be easily changed by operating the magnification optical system, and there is no deterioration in the quality of the image height due to this.

〔Effect of the invention〕

As mentioned above, according to the present invention, the capacity of the display memory required to perform one image synthesis can be reduced to one screen for display, and the images to be synthesized can be enlarged or reduced. However, the quality of the screen will not deteriorate.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of the present invention, Figure 2 is a block diagram showing details of the main parts of Figure 1, Figure 3 is 11-1.
FIG. 2 is a time chart showing signals of various parts. 1...CRT control unit, 2...frame memory, 3.
...Video signal generation circuit, 4...Two-dimensional scanner with variable magnification optical system, 5... Binarization circuit, 6... Video signal synthesis circuit, 7... CRT display, 8
. . . Composite image capture circuit, 9 . . . Switch section. dream 1 diagram

Claims (1)

[Claims] 1. Image data stored in display memory;
Composite image data output from a two-dimensional scanner having a variable magnification optical system, display the composite image data on a display device, and store the composite image data corresponding to the displayed composite image in the display memory. An image synthesis device characterized by: 2. A display memory for storing 1iIIIi image data;
Applicable. View the image data extracted from the display memory. A video signal generation circuit that converts to a video signal, and a video signal generation circuit. a two-dimensional scanner having a variable magnification optical system; A binarization circuit that binarizes image data output from the original scanner and converts it into a video signal, and the binarization circuit. a video signal output from the conversion circuit and the video; Synthesizes the video signals output from the signal generation circuit. a display device for displaying the synthesized synthesized video signal, and a synthesized image conversion and capture circuit for converting the synthesized video signal into image data and capturing it in the display memory. The image synthesizing device according to claim 1, characterized in that: #. 3. A display control circuit, a display memory, a video signal generation circuit connected to the display control circuit (a two-dimensional scanner having a variable magnification optical system, and a two-dimensional scanner connected to the two-dimensional/primary scanner); a binarization circuit; a video signal synthesis circuit connected to the video signal generation circuit and the binarization circuit;
A display device for displaying a signal from the video signal synthesis circuit, a composite image capture circuit for capturing the signal from the video signal synthesis circuit into the display memory, and a switch section for activating the composite image capture circuit. and displaying the video composite signal from the video signal stand/synthesizing circuit by operating the switch section. 2. An image synthesis system according to claim 1, wherein the image synthesis system is configured to incorporate images into a single screen.