JPH06180567A - Image processor - Google Patents

Abstract

PURPOSE:To provide the image processor which can gradually erase an image displayed on a display CRT or gradually display an image on the display CRT without increasing the image data. CONSTITUTION:The image processor which employs a look-up table system is equipped with a 1st storage device 107 which stores addresses of respective dots referenced in a look-up table for the image displayed on the display CRT 114, a display means which is equipped with the look-up table and outputs corresponding display data to the display CRT 114 by referring to the look-up table when an address is inputted, a 2nd storage device 111 which stores values of respective variable parameters showing whether or not an address is outputted to the display means corresponding to the address, a processing means which reads the addresses stored in the 1st storage device 107 and the variable parameters stored in the 2nd storage device 111 and outputs the addresses to the display means according to the values of the respective variable parameters, and a control means 100 which varies the values of the variable parameters and outputs them to the processing means after the display means outputs the display data to the display CRT 114.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to representation of special effects of characters displayed on a CRT.

[0002]

2. Description of the Related Art As a special effect expression of a display screen in image processing, there is an expression in which a displayed character is erased little by little, or conversely appears little by little. Moreover, various methods can be considered for the erasing method and the appearance method from the bottom, the top, or the whole.

Conventionally, when a character displayed on a display CRT is gradually erased from the top, or when a character is gradually displayed on the display CRT, for example, FIG.
As shown in (a) to (d), when gradually deleting the character “K” displayed on the display CRT, data regarding the four characters “K” is stored in the character ROM.
In preparation for the above, this was executed by displaying them in order. However, according to this method, there arises a problem that the amount of image data required to gradually erase one character from the screen of the display CRT is greatly increased to four times.

The present invention uses the special effect expression as described above.
It is an object of the present invention to provide an image processing device that can be executed without significantly increasing the amount of image data.

[0005]

An image processing apparatus according to a first aspect of the present invention is an image processing apparatus that employs a look-up table system, wherein each dot that refers to a look-up table of an image displayed on a display CRT is used. A first storage device for storing an address; and a lookup table,
In response to the input of the address, the display means for outputting the corresponding display data to the display CRT by referring to the look-up table, and the variable parameter corresponding to the address and indicating whether or not the address is output to the display means Second to store the value
A storage unit, a processing unit for reading an address stored in the first storage unit and a variable parameter stored in the second storage unit, and outputting the address to the display unit based on the value of each variable parameter; After the display means outputs the display data to the display CRT, the control means changes the value of the variable parameter and outputs it to the processing means.

An image processing apparatus according to a second aspect of the present invention corresponds to a first storage device for storing data of an image to be displayed on a display CRT, and the data corresponding to each data of the image.
The second storage device that stores the initial value of each variable parameter regarding whether to output to the RT, the image data stored in the first storage device, and the variable parameter stored in the second storage device are displayed. A processing unit that reads out and outputs image data to the display CRT based on the read value of the variable parameter, and the processing unit outputs the image data to the display CRT.
After being output to the RT, the control means changes the value of the variable parameter and outputs it to the processing means.

[0007]

In the image processing apparatus according to the first aspect, the processing means inputs the address to the display means based on the value of each variable parameter. The display means to which the address is input refers to the lookup table and outputs the display data corresponding to the address to the display CRT. After the display means outputs the display data to the display CRT, the control means changes the value of the variable parameter and outputs it to the processing means.

In the image processing apparatus according to the second aspect, the processing means outputs the image data to the display CRT based on the value of the variable parameter. After that, the control means changes the value of the variable parameter and outputs it to the processing device.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The image processing apparatus of the present invention is, for example, as shown in FIG. 7, a character "K" displayed on a display CRT.
When the characters are deleted in the order of (a) → (b) → (c) → (d) → complete deletion, as in the conventional case, (a), (b)
The image data of each of (c) and (d) is converted into the character RO.
Instead of storing it in M, in the character ROM,
Only the image data of (a) is stored, and in addition to the image data of the character, data (hereinafter referred to as trans data) indicating whether or not the image data corresponding to each dot of the character is output to the display CRT is stored. Prepare The image processing apparatus changes the value of the transdata so that the character “K” displayed on the display CRT is in the order of (a) → (b) → (c) → (d) → complete deletion. to erase. Hereinafter, the image processing apparatus of the present invention will be described in the following order with reference to the accompanying drawings. (1) Configuration of image processing device (2) Transdata (3) Description of image processing

(1) Configuration of Image Processing Apparatus FIG. 1 is a block diagram showing the configuration of the image processing apparatus according to the present invention. The image processing apparatus is a central processing unit (hereinafter referred to as CP
100), a work RAM 101, a program ROM 102, an object processing device 103, a background processing device 108, a display processing device 112, a first character ROM 107, and a second character ROM 111.
And a frame memory 106 and a display CRT 114.

The object processing device 103 comprises an object data storage device 104 and a transformer device 105. The background processing device 108 is the background data storage device 1.
09 and a transformer device 110. The display device 112 also includes a look-up table (hereinafter referred to as LUT) storage device 113.

Next, the first character ROM 107 and the second character ROM 107
The character ROM 111, the object data storage device 104, and the background data storage device 109 will be described.
The display CRT 114 is stored in the first character ROM 107.
Data of each character to be displayed on is stored. The image processing apparatus according to this embodiment employs a look-up table method. Therefore, the data of each dot of the character is an address value corresponding to the look-up table (hereinafter, the data of each dot is the LUT address). Here, when the LUT address is made to correspond to 256 pseudo colors in a one-to-one correspondence, the LUT address is composed of 8 bits. For example, the LUT address for a character composed of 8 × 8 pixels is as shown in FIG. FIG. 2 shows the LUT address consisting of 8 bits as if the 8 images were overlapped for the sake of convenience. For example, the LUT address of dot a is “000
11001 ", that is, 19H, and the LUT address of the dot b is" 000101010 ", that is, 16H.
As will be described in detail later, when the character data stored in the first character ROM 107 is directly input to the LUT storage device 113 in the display device 112 via the frame memory 106, the LUT address of each dot is stored. The image data corresponding to the value is output to the display CRT 114. Also, the value of the LUT address,
Corresponding colors in the look-up table do not necessarily have to correspond one-to-one, and for example, the LUT for each dot, such as the character “K” shown in FIG.
The image data corresponding to the address may have the same color. In this case, the dots of the same color will be erased or displayed at different timings.

The second character ROM 111 is the same as the first character ROM 107 except that it stores the LUT address of each dot on the background.

The object data storage device 104 stores object data as shown in FIG. 3 (a) below. One piece of object data corresponds to display processing of one character. Object data is
In addition to the display information such as the coordinates of the upper left dot of the character, that is, the (x, y) coordinates of the first dot of the image data of the character, the 32-bit trans data according to the present invention is provided.

The background data storage device 109 stores background data in the same format as the object data stored in the object data storage device 104.
Here, unlike the image data of the character, the information on the (x, y) coordinates of the first dot of the background data is always the origin (0, 0) on the display CRT. Therefore, the LUT address output from the background processing device 108 is directly input to the display device 112 without passing through the frame memory.
It should be noted that the transformer devices 105 and 110 have the same configurations and functions except for the size of data to be processed. Therefore, hereinafter, the character is displayed on the CRT 1
Description will be given only when displaying on 14.

(2) Trans Data Next, trans data will be described. As the trans data, the image data corresponding to the LUT address is CRT1.
It is used to determine whether to output to 14. The trans data is processed in the transformer devices 105 and 110. Here, when the value of the trans data is 0, the image data corresponding to the LUT address is CRT1.
It is output to 14. However, when the value of the trans data is 1, the image data corresponding to the LUT address is CR.
No output on T114. Incidentally, the transformer device 105
And 110 will be described in detail later.

Each 1 of 32 bits of trans data
8 consecutive bits of the LUT address correspond to the bits. That is, as shown in FIG. 3B, the trans data D0 has the LUT addresses “00000000-
00000111 ", that is, corresponding to 0 to 7H, D1
Is the LUT address “00001000 to 00001
111 ", that is, corresponding to 8 to FH, ..., D31
Is the LUT address “11111000 to 111111
11 ″, that is, F8 to FFH.

Here, focusing on the value of the upper 5 bits of the LUT address, the LUT corresponding to the trans data D0.
The upper 5 bits of the address are all "0000"
0 ", that is, 0, and the values of the upper 5 bits of the LUT address corresponding to D1 are all" 00001 ", that is,
The values of the LUT address corresponding to 1, ..., D31 are all “11111”, that is, 31. As understood from this, the value n of the upper 5 bits of the value of the LUT address corresponds to the trans data Dn.

In the transformer device 105, each value of the transformer data is used to judge whether or not to output the corresponding LUT address to the frame memory 106. When the value of the trans data is 0, the transformer device 105 outputs the LUT address corresponding to this to the frame memory 106. When the value of the trans data is 1, the transformer device outputs the value of the LUT address corresponding to this, instead of outputting the value of the LUT address, the LUT corresponding to the image data of the transparent color on the lookup table, that is, the color of the display screen.
Address value “11111111” is set to frame memory 1
It outputs to 06.

Each bit D0 to D3 of the trans data
The value of 1 is controlled by the CPU 100. For example, C
The PU 100 first determines all bits D of the transdata.
Set the value of 0 to D31 to 0 and set all LUs of the character
The T address is output to the frame memory, and the bit value of the trans data is changed from 0 to 1 in units of 1 bit or several bits at a predetermined timing. As a result, the character displayed on the display CRT 114 is
It is gradually erased.

(3) Description of Image Processing In the image processing apparatus of the present invention, for example, the display CRT 11 is used.
When gradually deleting the character displayed in 4,
Unlike the conventional method, first, the object data storage device 1
0 for all bit values of the trans data stored in 04
After the character is displayed on the display CRT 114, the bit value of the transdata is changed from 0 to 1 in units of 1 bit or several bits at a predetermined timing under the control of the CPU 100, and the display CRT 114 is displayed.
Gradually erase from. Hereinafter, a series of image processing for displaying the character image stored in the first character ROM 107 on the display CRT 114 and gradually deleting the character image under the control of the CPU 100 will be described in detail.
The description of the process of displaying the background image stored in the second character ROM 111 on the display CRT 114 and gradually deleting the background image is given in the first character ROM 1
Since it is the same as the processing for the character image data stored in 07, description thereof will be omitted.

The CPU 100 accesses the work RAM 101 and the program ROM 102 to start image processing. First, the character data (LUT address data) displayed on the CRT 114 is transferred to the first character ROM 1
The object data corresponding to the character to be displayed is read from the object data storage device 104 to the transformer device 105 while being read from 07 to the transformer device 105 in the object processing device 103.

The transformer device 105 includes a judgment circuit 200 as shown in FIG. 4, for example. The decision circuit 200 includes eight OR gates 201 to 208 and a flip-flop 20.
9 and a selector 210. Each 8-bit LUT address read from the first character ROM 107 is input to the input terminal L in units of 1 bit from the lower bit.
It is input to D _{in 0 to} LD _in 7. The determination circuit 200 is L
The upper 5 bits (LD _in 4 to LD _in 7) of the UT address are input to the selector. The value n of the upper 5 bits indicates that the input LUT address corresponds to the n-th bit data Dn of the trans data, as described above. On the other hand, the trans data included in the object data read from the object data storage device 104 is input to the flip-flop 209. The flip-flop 209 outputs the respective trans data D0 to D31 to the selector 210.

The selector 210 selects the corresponding n-th bit trans data Dn from the value n of the upper 5 bits of the LUT address, and uses the selected trans data Dn value as the output S _out of the selector 210 for each OR gate. 20
Output to 1 to 208. When the value of the trans data Dn is 0, the data of the LUT address input to the input terminals LD _in 0 to LD _in 7 is output data (LD
_{out 0~LD out} 7) as output to the frame memory 106, when the value of the transformer data Dn is 1, the data of the LUT address that is input to the input terminal LD _in 0~LD _in 7 is "11111111" , i.e., is changed to FFH, is output to the frame memory 106 as output data _{(LD out 0~LD o ut 7)} .

FIG. 5 shows an example of a judgment circuit having a configuration different from that of the judgment circuit 200 described above. The judgment circuit 300 is composed of one OR gate 301, a flip-flop 302, and a selector 303. Judgment circuit 2 shown in FIG.
00 controls the data of the character output to the frame memory 106 based on each bit value of the trans data input to the transformer device, the determination circuit 300 shown in FIG. The output of the write signal W output to the frame memory 106 is controlled based on the above.

Next, the operation of the transformer device 105 having the judgment circuit 300 shown in FIG. 5 will be described. Upon receiving the character data from the first character ROM 107, the transformer device 105 receives a predetermined timing (for example,
The LUT address of each dot is sequentially output to the frame memory 106 according to the clock signal). Accordingly, the transformer device 105 outputs the write signal W synchronized with the output timing of the LUT address of each dot to the frame memory 10.
Output to 6. The frame memory 106 is in a “write permitted” state when a low level write signal is input, and is in a “write prohibited” state when a high level write signal W is input.

The judgment circuit 300 provides the write signal W and the LUT of each dot to be output to the frame memory 106.
The upper 5 bits of the LUT address input to the transformer device 105 are input by the selector 303 in the same manner as the determination circuit 200 shown in FIG.
Select the trans data Dn corresponding to the bit value n,
When the value of the selected trans data Dn is 0, this is used as the output S _out of the selector 303 and the OR gate 30.
1 is input to one input terminal. The OR gate 301 to which a value 0 of S _out , that is, a low level signal is input, outputs the value of the write signal W input to the other input end to the frame memory 106 as it is. When the value of the selected trans data Dn is 1, this is input to one input end of the OR gate 301 as the output S _out . The OR gate 301 to which S _{out having} a value of 1, that is, a high level signal is input, is irrespective of the value of the write signal W input to the other input end, and the high level write signal W (write inhibit signal). Is output to the frame memory 106.

The frame memory 106 stores the input LU
When each data of the T address is stored for one screen of the character, the data is output to the display device 112. Display device 1
When the data of each LUT address of the character image is input, the reference numeral 12 refers to the look-up table stored in the LUT storage device 113 and outputs the image data corresponding to the LUT address. The display device 112 displays the output image data according to the information about the display input from the object data storage device 104 via the data bus, for example, the information such as the writing start address (x, y) of the image data of the character. It is output to the CRT 114 for display and displayed.

Here, in order to gradually erase the character image displayed in the above procedure from the display CRT 114, the CPU 100 changes the value of the trans data at a predetermined timing as described above. To be done. More specifically, when the character “K” shown in FIG. 7A is displayed as a character on the display CRT 114, the process of gradually deleting the character “K” from the top is as follows. To be executed. First, the image data corresponding to the LUT address is set to the same color as shown in FIG. 6A, the value of each LUT address is set as shown in FIG. 6B, and D0 to D3 of the trans data are set. Is set to 0, and the values of the remaining data D4 to D31 are set to 1. In addition, in FIG. 6B, the dots for which the value of the LUT address is not shown are the LUTs having a value of 20H or more.
Have an address.

"K" is displayed at a predetermined position on the display CRT 114.
When gradually deleting the character "K" after is displayed, the CPU 100 converts the values of D0, D1, D2 and D3 of the trans data from 0 to 1 at a predetermined timing. As described above, the trans data D0,
D1, D2 and D3 are LUT addresses 0 to 7H and 8 to
It corresponds to FH, 10 to 17H, and 18 to 1FH, respectively. Therefore, as the value of the transdata is changed from 0 to 1, the character “K” is changed to the one shown in FIGS.
As shown in (4), it is gradually erased from the screen of the display CRT 114.

By executing the above-mentioned processing, the display CR can be performed without storing the data of the four characters shown in FIGS. 7A to 7D in the frame memory or the like as in the conventional example.
The character displayed at T114 can be gradually deleted. The same process can be used to gradually erase the background displayed on the display CRT 14. Furthermore, when gradually displaying a character or background on a display CRT, it is easy to set all initial values of transdata to 1 and change the transdata value from 1 to 0 at a predetermined timing. Can be achieved.

In this embodiment, the look-up table method is adopted, but the first and second character ROMs are used.
The data stored in 107 and 111 may be 256-gradation pseudo-color image data or the like. The present invention is
Data (trans data) regarding whether or not to output each data of the image to be displayed to the display CRT 114,
Erase the image on the display CRT 114, or display C
The main point is to change the trans data by the CPU 100 when displaying on the RT 114.

[0033]

By using the image processing apparatus of the present invention, it is possible to increase the image data of the character or the background without increasing.
It is possible to gradually erase the character or background displayed on the display CRT, or, on the contrary, gradually display a special effect on the display CRT.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an image processing apparatus of the present invention.

FIG. 2 illustrates the LUT address of each dot of a character stored in the first character ROM 107.

FIG. 3A is an object data storage device 10.
3B is a diagram showing the individuality of the object data stored in FIG. 3, and FIG. 7B is a diagram showing the trans data stored in each object data and L corresponding to each bit of the data.
It is a figure which shows a UT address.

FIG. 4 is a diagram showing a configuration of a determination circuit 200 which is an example of a determination circuit provided in the transformer device 105.

5 is an example of a determination circuit provided in the transformer device 105, which is a determination circuit 300 different from the circuit shown in FIG.
It is a figure which shows the structure of.

FIG. 6A is a diagram showing an example of a character processed by the image processing apparatus of the present invention, and FIG. 6B is a diagram showing a LUT address of each dot of the character.

7A to 7D are diagrams showing a state of a character "K" when gradually deleting the character "K" shown in FIG.

[Explanation of symbols]

 Reference numeral 100 ... Central processing unit (CPU) 101 ... Work RAM 102 ... Program ROM 103 ... Object processing device 104 ... Object data storage device 105, 110 ... Transformer device 106 ... Frame memory 107 ... First character ROM 108 ... Background processing device 109 ... Background data storage device 111 ... Second character ROM 112 ... Display device 113 ... LUT storage device 114 ... Display CRT 200,300 ... Judgment circuit

Claims (2)

[Claims] 1. An image processing apparatus adopting a look-up table system, comprising: a first memory device for storing an address of each dot for referring to a look-up table of an image displayed on a display CRT; and a look-up table, For entering the address,
Display means for outputting the corresponding display data to the display CRT by referring to the look-up table, and second value storing the value of each variable parameter corresponding to the address and indicating whether or not to output the address to the display means A storage device, an address stored in the first storage device, and a variable parameter stored in the second storage device, and processing means for outputting the address to the display means based on the value of each variable parameter. An image processing apparatus comprising: a display unit that outputs display data to a display CRT, and then changes the value of a variable parameter and outputs the changed parameter value to the processing unit. 2. A first storage device for storing data of an image to be displayed on a display CRT, and an initial value of each variable parameter corresponding to each data of the image and indicating whether or not to output the data to the display CRT. A second storage device for storing values, image data stored in the first storage device, and variable parameters stored in the second storage device are read out, and image data is read based on the read values of the variable parameters. Is output to the display CRT, and after the image data is output to the display CRT by the processing unit, the control unit changes the value of the variable parameter and outputs it to the processing unit. Image processing device.