JPH0562866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides an image special effects device that can give a special effect such as reduction to a television signal, and can simultaneously obtain multiple reduced images as moving images on the same screen. It is related to.

Conventional technology Conventionally, as this type of image special effect device, A/D
The input image is reduced by controlling the write address, thinning out pixels, and writing the converted digital signal into an image memory with a capacity for one frame.
A method has been proposed in which an input image (input video signal) is converted into a plurality of reduced moving image signals by controlling the read address in a sawtooth waveform in the horizontal and vertical directions when reading the memory. The seventh image special effects device based on this principle
The configuration shown in the figure can be considered. In the figure, the input image shown in FIG. 8 is digitized by the A/D converter 1, and the pixels are thinned out by the write address generation circuit 3 into the image memory 2 having a capacity for one frame, as shown in FIG. It is converted into an image reduced in size.

Further, the read address generation circuit 4 generates a sawtooth read address as shown in FIG. 12, and by reading the input image from the image memory 2 using the read address, a reduced image as shown in FIG. 8 is obtained. .

In this way, even in the above-mentioned conventional image special effects device, the write address control circuit reduces the input image, and the read address control circuit generates read addresses in a sawtooth pattern, so that multiple input images can be displayed as moving images on one screen. can be displayed.

Problems to be Solved by the Invention However, in the conventional image special effects device described above, by changing the period and amplitude of the sawtooth wave,
In order to control the number of input images displayed on one screen, only images of the same shape are pasted onto various shapes, such as spheres and cylinders, and they are displayed simultaneously on one screen as a video. I had a problem that I couldn't do it. The present invention solves these conventional problems, and has the advantage of being able to paste input images into various shapes, such as spheres, cylinders, and cones, and display multiple images on the same screen as moving images. The object of the present invention is to provide an image special effects device that provides a special image effect.

Means for Solving the Problems In order to solve the above problems, the present invention provides a read address generation circuit for pasting input images onto various shapes such as a sphere and a cylinder, an address memory for storing the addresses, and an address memory. The apparatus is configured to include an address memory control circuit for controlling the image data, and an image memory for storing digitized input images.

Effects By configuring the present invention as described above, it is possible to paste input images into various shapes and display the input images as moving images in a plurality of shapes on one screen.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention, in which 1 is an A/D converter, 2 is an image memory, 5 is a D/A converter, 6 is a write address generation circuit, and 7 is an A/D converter.
is address memory, 7 _a to 7 _c is address memory 1
-3 and 8 are address memory control circuits, 9 is a read address generation circuit, and 10 and 11 are first and second address memory control circuits, respectively.
This is the second changeover switch. Here, the input image (input video signal) is converted into a digital signal by the A/D converter 1 and sequentially written into the image memory 2 according to the write address generation circuit 6. A read address generation circuit 9 generates read addresses for the image memory 2 when an input image is pasted in various shapes, such as a sphere, and the generated addresses are written to the address memory in the write cycle.
At the same time, the address memory 7 which was in the write cycle at the time of the previous field is read out as a read cycle, and the input image is read out from the image memory 2 according to the written address. Further, the address memory 7, which was in a read cycle during the previous field, is cleared in a clear cycle in preparation for the next cycle. In this way, three address memories 7 _a to 7 _c
repeats write, read, and clear cycles in order. By operating the address memory control circuit 8, it is also possible to stop the clear cycle of the address memory 7 and repeat the read cycle and write cycle with the two address memories. Image memory 2
The video data written in is read out from the address memory 7 according to the address read out, and is converted into an analog video signal by the D/A converter 5 and output.

Next, the operation of the above embodiment will be explained. The input image is digitized by the A/D converter 1 and sequentially written into the image memory 2 by the write address generation circuit 6. Next, the read address generation circuit 9 generates a read address for the image memory 2 when the input image is pasted on a sphere, for example _, as shown in _FIG . A read address is written in a certain address memory at a position where a sphere exists. Normally, the three address memories _7a to _7c are subjected to a write cycle, a read cycle, and a clear cycle for each field by an address memory control circuit 8, as shown in FIG. For this reason, the read address of the shape generated by the read address generation circuit 9 uses the time of one field to be calculated, so that only one shape of the shape is stored in the address memory 7 as a result. However, the memory address control circuit 8
As shown in Figure 4, the clear cycle is stopped and the changeover switch 1 is turned on using the two address memories 7.
When a write cycle and a read cycle are performed alternately through 0, 11, the read address of the ball shown in FIG.
For example, as shown in FIG. 5, the read address generation circuit 9 generates the read address when the input image, which is a different shape, is pasted on the cylinder. It is possible to overwrite the memory 7 without clearing it. The address memory 7 in the read cycle is sequentially read out by the address memory control circuit 8, and the input image is read out from the image memory 2 according to the read address, and is converted into an analog image by the D/A converter 5 and output. Image 12 is obtained.

The present invention has the following effects due to the configuration shown in the above embodiments. That is, the digitized input images are sequentially written into the image memories 7 _a to 7 _c , and then when the address generation circuit 6 pastes the input images on, for example, a sphere or a cylinder, the corresponding image memories 2 are read out. Generate an address, write the read address in the address memory 7 at a position to display the attached object, read out the address memory 7 in order, and read out the image memory 2 according to the address written in the predetermined position. By doing this, we obtain an image that looks like the input image is stuck to a sphere or cylinder.
Here, the address memory control circuit 8 is operated to stop the clear cycle of the address memory 7, and the address memory control circuit 8 writes the generated read address of a different shape to another location of the address memory 7.
Next, by sequentially reading the address memory 7 and reading the image memory 2 using the read addresses, it is possible to obtain an image in which the input image is stuck to a plurality of different shapes as a moving image.

Effects of the Invention The present invention has the above-mentioned configuration, and can display any number of images with postscript priority in any desired position on one screen, with input images pasted as moving images in any shape, and special effects. This has the advantage that the functions of the device can be greatly expanded.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a special effects device according to an embodiment of the present invention, FIG. 2 is an image diagram of an address memory when an input image is pasted on a sphere, and FIG. 3 is a timing chart of a normal address memory.
Figure 4 is a timing chart of the address memory when obtaining the effects of the present invention, Figure 5 is an image diagram of the address memory when an input image is pasted on a cylinder, and Figure 6 is an example of an output image obtained by the present invention. 7 is a block diagram of a conventional special effects device, FIG. 8 is a diagram showing an input image, and FIG. 9 is a diagram showing the input image reduced by controlling the write address and written to the image memory. , Figure 10 is a diagram showing four input images reduced on one screen by controlling the readout address, Figure 11 is a graph showing the relationship between normal readout address and time, and Figure 12 is the output of Figure 10. It is a graph showing the relationship between read address and time when obtaining an image. 1...A/D converter, 2...image memory, 5...D/
A converter, 7...address memory, 8...address memory control circuit, 9...read address generation circuit, 1
0, 11...Selector switch.

Claims (1)

[Claims] 1. An image memory that stores one frame of the digitally converted input video signal in response to a write address signal, and a read address generation circuit that stores addresses for one frame of the image corresponding to the desired reduced shape. , 1 of the above address generation circuit
It is equipped with a plurality of address memories in which field data is written during a read cycle, read during a write cycle, and erased during a clear cycle, and an address memory control circuit that specifies each cycle of these address memories. By overwriting the address of the desired shape generated by the address generation circuit without clearing the data in the address memory, the background of the figure of the desired shape can be made into a normal moving image. special effects equipment.