JPS6282779A - image special effects equipment - 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 Industrial Application The present invention provides an image special effect device that can give special effects 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.

BACKGROUND OF THE INVENTION Conventionally, this type of image special effects device processes an input image by controlling a write address, thinning out pixels, and writing an A/D-converted digital signal into an image memory having a capacity for one frame. A method has been proposed in which the input image (input video signal) is converted into multiple reduced video signals by reducing the size of the input image (input video signal) and controlling the readout address horizontally and vertically in a sawtooth waveform when reading the memory. ing. A conceivable image special effect device based on such a principle is the configuration shown in FIG. 7. 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. The image is converted to a reduced image as shown in .

Further, the read address control circuit 4 generates a sawtooth read address as shown in FIG. 12, and reads the input image from the image memory 2 using the read address to obtain a reduced image as shown in FIG. 8.

As shown in the above 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.
- It is possible to display multiple input images as moving images on the screen.

Problems to be Solved by the Invention However, in the conventional image special effects device described above, the number of input images to be displayed on the screen is controlled by changing the period and amplitude of the sawtooth wave. There is a problem that only images of the same shape can be pasted onto various shapes, such as a sphere or cylinder, and that it is not possible to simultaneously display them as moving images on the screen. The present invention solves these conventional problems.69 It has the advantage of being able to paste input images into various shapes, such as spheres, cylinders, and cones, and display multiple images as moving images on the same screen. The object of the present invention is to provide an image special effects device with a high level of image quality.

Means for Solving the Problems The present invention solves the above problems by converting the input image into a sphere,
A device configured to include a read address generation circuit that can be attached to various shapes such as a cylinder, an address memory that stores the address, an address memory control circuit that controls the address memory, and an image memory that stores digitized input images. It is.

By configuring the invention as described above, the present invention achieves the effect that the input image can be stretched into various shapes and displayed as a moving image on a plurality of screens. be.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention.
is an A/D converter, 2 is an image memory, 5 is a D/A converter,
6 is a write address generation circuit, 7 is an address memory, 7
Address memories 1 to 3.8 are address memory control circuits, 9 is a read address generation circuit, and 10.11 is a first and second changeover switch, respectively. Here, an input image (input video signal) is converted into a digital signal by an A/D converter 1 and sequentially written into an image memory 2 according to a 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 the read cycle during the previous field is cleared in the clear cycle in preparation for the next cycle. 2, the three address memories 7a to 7c repeat 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. The video data written in the image memory 2 is read out according to the address read out from the address memory 7, is converted into an analog video signal by the D/A converter 5, and is output.

Next, the operation of the above embodiment will be explained. The input image is A
/D conversion converter upstream is digitized 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.
The read address is written to the position of the address memory sphere in the write cycle in c. Normally, the three address memories 7a to 7c are subjected to a write cycle, a read cycle, and a clear cycle repeatedly for each field by the 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
When the clear cycle is stopped and the write cycle and read cycle are performed alternately via the changeover switches 10 and 11 using the two address memories 7 as shown in FIG.
In a certain field, while the readout address of the sphere shown in FIG. 2 is written in the address memory 7, in the field, for example, as shown in FIG. Generated by the address generation circuit 9 that read the read address when pasted,
It is possible to overwrite the address memory 7 without clearing it. The address memory 7 in the read cycle is sequentially read by the address memory control circuit 8, and the input image is read from the image memory 2 according to the read address, and is converted into an analog image by the D/A converter 5 to obtain the output image 12. .

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 7a to 7c, and then, when the read address generation circuit 6 pastes the input image on, for example, a sphere or cylinder, the read address of the image memory 2 corresponding to the input image is written to the image memories 7a to 7c. , write the read address in the address memory 7 at the position where the pasted object is to be displayed, read out the address memory 7 in order, and read out the image memory 2 according to the address written in the predetermined position. To obtain an image in which the input image appears to be attached 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 another shape to another location of the address memory 7. 7 in order and reading the image memory 2 according to the read addresses, it is possible to obtain an image in which the input image is stuck to a plurality of different shapes while remaining as a moving image.

Effects of the Invention The present invention has the above-described configuration, and can display any number of images in which ``11 input images of a moving image are pasted in an arbitrary shape on one screen at an arbitrary position with priority given to postscript.
This has the advantage that the functions of the special effects 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, Fig. 3 is a timing chart of a normal address memory, 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 a diagram of the output image obtained by the present invention. Figure 10 is a diagram showing four input images reduced on one screen by controlling the read address, Figure 11 is normal readout. Graph showing the relationship between address and time. FIG. 12 is a graph showing the relationship between read address and time when obtaining the output image of FIG. 10. 1...A/D converter, 2...image memory,
5...D/A converter, 7...Address memory, 8...Address memory control circuit, 9.
...Read address generation circuit, 10.11...
...Choice switch. Name of agent: Patent attorney Toshio Nakao and one other person h51F>. ε, ) 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] After A/D converting the input image, writing it to the memory, reading it and D/A converting it to obtain an image signal, sequentially writing the input image to the memory by an address generation circuit,
An image special effects device in which an address generating circuit generates an address necessary for reading a memory, the obtained read address is stored in an address memory, and the address memory is controlled by an address memory control circuit.