JPS6040031B2 - Image display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image display method, and in particular to displaying an arbitrary image from a group of image information written in a digital memory on at least one television monitor by using a scaler and a mask. Concerning what you have chosen to do.

In general, digital memos are known to store a large amount of image information, selectively take out this information using address signals from a control circuit, and send it to each individual TV monitor for image reproduction. It is being

FIG. 1 shows an example of such a conventional example, where 1 is a computer;
2 is a memory bank, and image data is exchanged between these memory banks. Further, on the output side of the memory bank 2, D-A converters 3a to 3n corresponding to the desired number of image information are provided.
and multiple TV monitors 4 that individually correspond to these
A to 4n are connected one after another, and an address signal of a destination to which image information is to be transferred is supplied from a separately arranged control section 5 to the final memory bank 2. Further, a synchronizing signal synchronized with the frame or field signal of the television monitor is supplied from the control section 5, so that image switching can be performed smoothly. However, according to such an image display device, it is necessary to prepare independent D-A converters 3a to 3n and television monitors 4a to 4n, respectively, to receive image information written on a large number of images by the computer 1. The overall size and price cannot be avoided.

Of course, the output signal of the memory bank 2 or the output signal of the D-A converters 3a to 3n can be arbitrarily switched manually using a switch, and some of the D-A converters 3a to 3n and the TV motors 4a to 4n, or TV monitor 4
It is conceivable to omit some of a to 4n to save on these expensive devices. However, even with the above configuration, since any area of the memory bank 2 is displayed on any one of the TV monitors 4a to 4n, which are independent of each other, if a specific image is desired. When displaying outside of any of the TV monitors, even if the image information exists in the memory bank, it is transferred to the display area in the memory bank 2 corresponding to that TV monitor 4a to 4n. I needed to redo it. As a result, the computer time required for image transfer processing, etc. increases, resulting in a lack of quick response. In addition, as mentioned above, manually switching the output of the image information signal is complicated, and not only is time loss unavoidable, but
Unable to display work pictures. Furthermore, since the gray level of the image is also fixed for each image, there is a drawback that, for example, a memory bank of 2 frames with 8-bit density cannot be used as 16 frames with 1-bit density. The present invention proposes a new technology that completely eliminates the various drawbacks of the conventional system, and therefore, the purpose of the present invention is to provide a method for obtaining desired information from a plurality of image information groups written in a memory bank. It selectively extracts only information and displays it on a TV monitor at an arbitrarily selected density.
It is an object of the present invention to provide a new image display method that can save image transfer operations and the transfer time required therefor. Another object of the present invention is to provide a new image display method that allows a group of images written in the above-mentioned closing bank to be easily displayed as a moving image by instructions from a computer.

Next, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 2 is a block circuit diagram for realizing the image display method according to the present invention, where 6 is a computer, 7 is a number of pixels of N×N, and a depth of M.
Bit memory bank 8 is a scaler controlled by the output of the computer 6, which shifts the input digital signal as it is toward the most significant digit according to the scale value (number of bits to be shifted) supplied from the computer 6 and outputs it. It is something to do.

FIG. 3 diagrammatically represents the function of the scaler 8. The scaler consists of registers with a number of digits corresponding to the depth of the memory bank 7, that is, M-bit registers from the most significant digit to the least significant digit. , the outputs b to bM of the final memory bank 7 for each digit are supplied. Then, corresponding to the scale value specified by the computer from 0 to M-1, each output is initially b,, b2..., bM, while the sequential outputs are Q, b3...・, 0, then b3
, Q, Wide......0, the contents of the memory are output shifted to the right one digit at a time. Therefore, by playing back the sequentially changing image information of this output on a TV monitor, A picture effect can be obtained. Further, a mask 9 is connected to the output of the scaler 8 corresponding to each digit. The mask 9 is composed of AND circuits whose number corresponds to at least the maximum value of the number of bits representing the density of the image to be displayed, and
The bit to be displayed is specified by the mask value specified by , the bit to be masked is set to 0, the bit to be displayed is set to 1, and the logical product with the input digital signal is taken, and the following DA converter 10 It operates in such a way that it outputs to . Further, a television monitor 11 is connected to the output side of this DA converter 10.

Reference numeral 12 denotes a separately arranged control section, which supplies an address signal of a destination for supplying image information to the above-mentioned closing bank 7, and also supplies a synchronization signal to the television monitor 11.

Currently, image data is exchanged between the computer 6 and the memory bank 7, and a plurality of pieces of image information to be displayed after image processing are stored in the memory bank 7.

In order to display the image on the television monitor 11, the control section 12 sends a memory address signal to the memory bank 7.
to specify the required image information. Then, the digital output, which is the content of the address signal, is passed through a scaler 8 and a mask 9 placed under the control of the computer 6.
A D-A converter is supplied, which converts the required image signal into an analog signal, and displays the image on the television monitor 11. Note that the television monitor 11 includes a control section 12.
A synchronizing signal is supplied from the DA converter, and a composite video signal is formed between this signal and the output of the DA converter. In this case, the scaler 8 sends the memory bank 7 by a sending pulse corresponding to the scale value supplied from the computer.
The digital signal output from the mask 9 is output from the mask 9 by shifting the scale value one digit at a time toward the most significant digit. Then, in this mask 9, a logical AND is performed with the scaler output shifted one digit at a time as described above according to the mask value designated by the computer 1, and the DA converter 1
Outputs 0'. Here, the depth M of the memory bank 7 is 1
In the case of 6 bits, if the image density is 8 bits, the memory bank 7 can store two frames, an original image and a processed image. Then, by setting all bits of the mask 9 to 1 and specifying the scale value of the scaler 8 to 0 or 8, the original image as it is and the new image can be displayed as desired. Therefore, there is no need to retransfer data to the display area of the memory bank each time as in the past.
Transfer time can be saved. Incidentally, the scaler 8 can also be constituted by a shifter in a circular manner such that the most significant digit is followed by the least significant digit. Also, assuming that the density of the image is equal to 1 bit (for line drawings, etc.), the memory bank 7 can store 16 frames, and if the most significant bit of the mask 9 is set to 1 and the rest are 0, then the scaler 8 scale value from 0 to M-
By arbitrarily specifying up to 1, any image information can be extracted.

Furthermore, by sequentially changing the scale value using a computer at regular intervals, a series of images can be obtained as a moving image at a constant speed. In addition, by preparing three circuits including the scaler 8, mask 9, and D-A converter, and using any area in the memory bank 7, R, G, and B color codes can be converted into images. It can be played back simultaneously with the signal, making it easy to display color images. By placing an image switch with a depth of about 8 bits between the memory bank 7 and the scaler 8, the scaler 8 can be made into 8 bits, and the circuit configuration can be simplified.
It is also optional to use a cyclic shifter as the scaler 8. As explained above, according to the present invention, a logic circuit corresponding to the density, etc. of an image to be displayed is provided, unlike a conventional logic circuit that includes a large number of logic circuits in which the density, etc. of image information to be created is uniquely set in advance. If the logic circuit itself does not have to be replaced or added, there is no need to change the logic circuit itself, that is, by changing the scale value and mask value without changing the hardware, the image information to be displayed and its Density can be set arbitrarily, various image information can be easily displayed, and processed images can be written to unused frames in the memory bank at the image processing stage. There is no need to transfer images to the display area in the bank, saving transfer time.

In addition, unlike conventional methods that display the data transferred to the memory bank by switching and displaying it directly to express the image, by changing the scale value, the display screen can be switched and a video can be displayed, and the mask value can also be changed. By doing so, it is also possible to change the density, which has the advantage of allowing more detailed settings for the expression of the image.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing a conventional image display method, FIG. 2 is a block circuit diagram showing an embodiment of the image display method according to the present invention, and FIG. 3 is an explanatory diagram of a scaler. 6...Calculator, 7...Memory bank,
8. ．．・．． ．．・Scala, 9...Mask, 10
......D-A converter, 11...monitor. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In an image display method that selectively extracts desired image information from a group of arbitrary image information written in a memory bank, converts it from digital to analog, and displays it on a television monitor, It consists of a register with a number of digits corresponding to the depth of the image, and a scaler that shifts and outputs each image information in the memory bank by the number of digits according to the scale value supplied from the computer, and at least the density of the image to be displayed. , and a mask for outputting the logical product of each digit of the output of the scaler and a mask value supplied from a computer; A line display method characterized in that image information to be displayed and its density can be arbitrarily set by changing values. 2 In an image display method that selectively extracts desired image information from a group of arbitrary image information written in a memory bank, converts it from digital to analog, and displays it on a television monitor, the depth corresponds to the depth of the memory bank. A scaler consists of a register with a number of digits, and shifts each image information in the memory bank by the number of digits according to the scale value supplied from the computer, and outputs it, and a maximum number of bits that represents at least the density of the image to be displayed. The image is composed of a number of logical product circuits corresponding to the value, and includes a mask that outputs a logical product of the output of each digit of the scaler and a mask value supplied from a computer, and is displayed by changing the mask value. By arbitrarily setting the density of information and sequentially changing the scale value at regular time intervals, a group of image information written in a memory bank is displayed in a moving image on a television monitor. An image display method characterized by: