JPH08194457A - Image processing device - Google Patents

Abstract

PURPOSE: To rewrite and read out a lookup table without interrupting image display by providing an input part to input image data and plural input parts with the input part to input a color component value to the lookup table in a lookup table storage means. CONSTITUTION: Image data is inputted to an input part A11 from an image data input device 2. An R, G, B component value of a lookup table 13 corresponding to address data possessed by a picture element of image data inputted from the input part All, is outputted from an output part All' as display data of a picture element. The display data is processed on display by a display control part 14, and is displayed on a display device 3. When the content of the lookup table 13 is rewritten, a rewriting address is designated, and writing data on the rewriting content is inputted to an LUT output part 15. The rewriting data is inputted to an input part B12, and the content of the designated address of the lookup table 13 is rewritten as inputted writing data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus capable of efficiently performing image processing. In image processing such as computer graphics, it is necessary to display the created image at high speed and efficiently perform image processing. The present invention relates to an image processing device capable of efficiently changing a color of an image without interrupting transfer of image data to a display device.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional image processing apparatus. Figure 6
In the figure, reference numeral 110 denotes an image data input device, which is a magnetic disk device for holding image data, a CDROM or the like. The image data is held for each pixel by the address value of the lookup table.

An image processing device 111 converts image data into display data having R, G, B components of colors for each pixel by an input look-up table. A display device 113 is a display or the like.

Reference numeral 114 denotes an input device such as a keyboard. In the image processing apparatus 111, 120 is a look-up table storage means for holding a look-up table (LUT) in which color components (R, G, B values) of an image are associated with addresses. Usually R,
The G and B components each have 256 gradations.

An input unit 121 is for inputting image data. An output unit 121 'outputs the display data obtained by the look-up table (LUT).

A storage unit 123 holds a look-up table (LUT). An input signal selection unit 125 selects input data (image data, write data).

Reference numeral 125 'is an output signal selecting section for selecting output data (display data, read data). Reference numeral 126 denotes an image processing unit that enlarges or reduces an image.

Reference numeral 127 is a display controller. 128 is LU
T input / output unit, which inputs write data for rewriting the contents of the storage unit (LUT) 123,
The contents of the (UT) 123 are read and output.

Reference numeral 129 is a LUT control unit, which is a storage unit 1.
The input / output control of 23 is performed. 129 'is a CPU
Is.

The operation of the configuration shown in FIG. 6 will be described. Image data is input from the image data input device 110 to the input signal selection unit 125.
Transferred to. When displaying an image, the input signal selection unit 125 selects image data and the input unit 121 inputs the image data. The image data has an LUT (123) address for specifying a color for each pixel.

In the look-up table storage means 120, R, G, B are determined by the address of each pixel of the image data.
The value is read and transferred to the output unit 121 'as display data having R, G, B component values for each pixel. When displaying an image, the output signal selection unit 125 ′ transfers the display data to the image processing unit 126. The image processing unit 126 performs processing such as enlargement and reduction on display data as necessary, and the display control unit 127 performs display processing and displays an image on the display device 113.

Further, the lookup table storage means 12
When the contents of 0 are rewritten, the input device 114 specifies the address to be rewritten to instruct the writing of the look-up table and write data (R, G, B).
Value). The input signal selection unit 125 is controlled by the LUT control unit 129, selects write data, and inputs it to the input unit 121 of the lookup table storage unit 120. In the look-up table storage means 120, the contents of the designated address are input and rewritten into write data.

When the contents of the storage unit (LUT) 123 are read and displayed, an address to be read is specified by the input device 114 and an instruction to read the contents of the storage unit 123 is given. The input signal selection unit 125 selects the input address and inputs it to the input unit 121. The contents of the specified address are read from the storage unit 123, and the output unit 12
1'is transferred. The output signal selection unit 125 ′ transfers the read content to the LUT input / output unit 128. The LUT input / output unit 128 transfers the read content to the display control unit 127. The display control unit 127 performs display processing on the read content and displays it on the display device 113.

The operation of the conventional image processing apparatus will be described with reference to FIG. FIG. 7A shows an image display process before the look-up table is rewritten.

FIG. 7B shows the process of rewriting the contents of the lookup table. FIG. 7C shows the image display operation after rewriting the lookup table. Figure 7 (a),
In (b) and (c), 130 is image data, which has an address of the lookup table 131 for each pixel.

Reference numeral 131 is a lookup table,
It has color R, G, B values corresponding to addresses. 1
A display image 32 is an image displayed based on the image data 130.

Reference numeral 134 is a pixel, and the address of the look-up table (LUT) 131 is 2. Reference numeral 134 'is a pixel of the display image displaying the color obtained by the address of the pixel 134 of the image data 130.

Reference numeral 115 is an LUT input / output unit. Figure 7 (a)
As described above, each pixel of the image data 130 has an address of the lookup table 131. The look-up table 131 is referred to by the address of the image data of each pixel, and its R, G, B values are read out, and its R, G, B is read.
The display image 132 is displayed according to the value.

When the color of the display image 132 is changed,
As shown in FIG. 7B, the contents of the lookup table 131 are rewritten by the LUT input / output unit 115. For example, the content of address 1 is currently G, but its value is R
Shall be changed to. The address 1 is designated by the LUT input / output unit 115 and the write data R is input. The lookup table 131 is rewritten as shown in FIGS. 7A to 7B.

Next, the display image after the look-up table 131 is written will be described with reference to FIG. Similar to the case of FIG. 7A, R of the lookup table 131, R
The G and B values are read out and the color of each pixel is displayed according to the R, G and B component values (display image 132).

In FIG. 7C, the lookup table 13
Since the address 1 of 1 is changed to R, all the pixels 135 having the address 1 of the image data are displayed in R.

[0022]

In the conventional image processing apparatus, the look-up table storage means 120 has only one input section. Therefore, when the input signal selecting section 125 is provided to rewrite the contents of the look-up table. Further, when the contents are read out in order to confirm the contents of the look-up table, the data input to the look-up table storage means 120 is selected on the LUT input / output unit side and the input of the image data is stopped. Therefore, the image display was interrupted.

According to the present invention, without interrupting the image display,
An object of the present invention is to provide an image processing device capable of rewriting a look-up table and reading the contents of the look-up table.

[0024]

According to the present invention, there is provided a look-up table storing means for storing a look-up table having a color component value of an image in correspondence with an address, and the color of a pixel is determined by the address of the look-up table. In an image processing apparatus for inputting designated image data and converting the image data into display data having a color component value for each pixel according to a lookup table, the lookup table storage means includes an input unit for inputting the image data. The lookup table has multiple input sections for inputting color component values.

FIG. 1 is a diagram showing the basic configuration of the present invention.
In FIG. 1, reference numeral 1 is an image processing apparatus.

Reference numeral 2 is an image data input device. 3 is a display device. Reference numeral 4 is an input device.

In the image processing apparatus 1, reference numeral 10 is a look-up table storage means having a plurality of input sections.

Reference numeral 11 denotes an input unit A, which is an input unit for inputting image data. Reference numeral 12 denotes an input unit B for inputting write data for rewriting the look-up table 13.

A storage unit 13 holds a look-up table (LUT). A display control unit 14 is a display process of display data obtained by converting image data, or a look-up table (LUT).
The display processing of the content of 13 is performed.

Reference numeral 15 is an LUT input / output unit which inputs write data for rewriting the contents of the lookup table storage means 10 and outputs the contents read from the lookup table 13.

Reference numeral 16 is an LUT control unit which controls the input / output of the look-up table 13.

[0032]

The operation of the basic configuration of the present invention shown in FIG. 1 will be described. Image data is input to the input unit A (11) from the image data input device 2. The R, G, B component values of the lookup table 13 corresponding to the address data of the pixel of the image data input from the input unit A (11) are output from the output unit A (11 ') as the display data of the pixel. . The display data is processed by the display controller 14 and displayed on the display device 3.

When the contents of the look-up table 13 are rewritten to change the color of the display image, the address to be rewritten is designated and the LUT input / output unit 15
Input the write data with the contents to be rewritten. The write data is input to the input section B (12), and the contents of the designated address of the lookup table 13 are rewritten with the input write data.

In order to confirm the contents of the look-up table 13, if the contents are read out, the LUT
The address is input to the input / output unit 15. The read contents are transferred from the output unit B (12 ') to the LUT input / output unit 15,
The LUT input / output unit 15 displays the read content on the display control unit 14.
Transfer to. The display control unit 14 performs a display process of the read content and displays it on the display device 3.

FIG. 2 is an operation explanatory diagram of the basic configuration of the present invention. FIG. 2A shows the operation before rewriting the contents of the lookup table. FIG. 2B shows the process of rewriting the look-up table and the process after rewriting the look-up table.

In FIGS. 2A and 2B, 20 is image data. Reference numeral 21 is a lookup table.

Reference numeral 22 is a display image. Reference numeral 15 is an LUT input / output unit. As shown in FIG. 2A, each pixel of the image data 20 has an address of the lookup table 21.
The contents (R, G, B components) of the lookup table of the address corresponding to the address data of each pixel of the image data are read out for each pixel, and the display image 22 is obtained.
For example, since the pixel 24 of the image data 20 has the address 2 of the lookup table 21, the image component value B corresponding to the address 2 of the lookup table 21 is read and read to the pixel 24 ′ of the display image 22. B is displayed.

Next, the case of rewriting the contents of the lookup table 21 will be described with reference to FIG. When the contents of the lookup table 21 are changed to change the color of the display image, the LUT input / output unit 15
Specify the address to be rewritten and input the rewriting data. For example, assume that the contents of address 1 of the lookup table 21 are changed to R. The address 1 to be rewritten is specified, and the rewriting data R is input to the LUT input / output unit 1
Enter in 5. As a result, the contents of address 2 of the lookup table 21 are rewritten to R as shown in the figure.

During this time, the display process of the image data 20 is performed without interruption, the image data of each pixel of the image data 20 is converted into the display data according to the look-up table 21, and the display image 22 is continuously displayed.

After the contents of the look-up table 21 are rewritten, a display image according to the contents is obtained. For example, in the illustrated case, the pixel 25 whose address is 1 in the lookup table 21 becomes the display image 22 whose color is converted to R.

The same applies to the case where the contents of the look-up table 21 are read out and displayed. While the contents are read out by designating an address, the conversion of the image data into the display data of each pixel is performed without interruption, and the display image is displayed. 22 is displayed.

According to the present invention, the lookup table is written without interrupting the image data display processing,
Readout can be performed, and image processing can be efficiently performed.

[0043]

FIG. 3 shows an embodiment of the present invention in which a dual port SRAM is used as the look-up table storage means.

In FIG. 3, reference numeral 51 is an image processing apparatus. Reference numeral 52 is an image data input device.

Reference numeral 53 is a display device. Image processing device 51
In the above, reference numeral 60 is a look-up table storage means, which is constituted by a dual port SRAM.

63 is a dual port SRAM,
It holds the R component value of a color. The R component has 256 tones. Although not shown, it has respective input sections for inputting image data and write data.

Reference numeral 63 'is a dual port SRAM, which holds the G component value of color. G component is 25
Has 6 tones. It has respective input sections for inputting image data and write data (details of the configuration of the dual port SRAM are shown in FIG. 4).

Reference numeral 63 "denotes a dual port SRAM which holds the B component value of color. The B component is 25.
Has 6 tones. It has respective input sections for inputting image data and write data.

Reference numeral 66 denotes an image processing unit which enlarges or reduces the image. A display control unit 67 performs a display process of display data or a display process of the contents of the lookup table.

An image display processing unit 67 'performs display processing of display data. Reference numeral 67 "is a memory data display processing unit for performing display processing of the contents read from the look-up table storage means.

Reference numeral 70 is a CPU. An image control device 74 is an LSI that controls the image processing device 51.
Reference numeral 75 is an LUT input / output unit.

Reference numeral 76 is an LUD control unit. Reference numeral 77 is an interface with an input device. 80 'is an input device.

The operation of the configuration shown in FIG. 3 will be described. The LUT controller 76 controls the image data input device 52 to input the image data to the look-up table storage means 60. Address of R component gradation value is dual port SRA
The grayscale address of the G component is input to the M63, the grayscale address of the B component is input to the dual port SRAM 63 ", and the grayscale address of the B component is input to the dual port SRAM 63". The dual port SRAM 63 and 63'63 "are respectively displayed. The R component, G component, and B component of the data are obtained. The obtained display data is transferred to the image processing unit 66, and if necessary, enlarged or reduced. And
The display data is transferred to the display control unit 67, subjected to display processing by the image display processing unit 67 ′ and displayed on the display device 53.

When rewriting the contents of the look-up table, the input device 80 'is used to give the image control device 74 an instruction for writing the look-up table and designation of an address to be rewritten. Then, the rewriting data (R component, G component, B component) is supplied to the LUT input / output unit 75.
To enter. The LUT input / output unit 75 is controlled by the LUT control unit 76, the rewrite data is input from the LUT input / output unit 75 to the lookup table storage means 60, the R component is the dual port SRAM 63, and the G component is the dual port SRAM 63 ′, R. Component is dual port SRAM6
3 "and written in each lookup table.

To read the contents of the lookup table, the input device 80 'is used and the LUT input / output unit 75 is used.
Input the instruction to read and the address to read. L
The UT input / output unit 75 is controlled by the LUT control unit 76 to read each content of the designated address, and display control unit 67.
Transfer to. The read contents are displayed and processed by the memory data display processing unit 67 ″, and the contents are displayed in a window on the display device 53.

FIG. 4 shows a dual port S used in the present invention.
An example of a RAM configuration is shown. In FIG. 4, the left and right input ports A and B have exactly the same configuration, but the left side is used for image display, and the right side is used for writing to the memory array and reading the contents.

Reference numeral 80 denotes a memory array, which is an area for storing a look-up table. 81 is the input port A
Is. Reference numeral 82 is a register for temporarily holding write data.

Reference numeral 83 is a writing section for writing write data in the memory array 80. Reference numeral 84 denotes a read unit, which includes a sense amplifier that amplifies the data read from the memory array.

Reference numeral 85 is a control signal input section for inputting a control signal given from the write control device. A decoder 86 decodes an address.

Reference numeral 87 is a register for holding an address. Reference numeral 91 is an input port B. Reference numeral 92 is a register for temporarily holding write data.

A write unit 93 writes write data in the memory array 80. Reference numeral 94 denotes a read unit, which includes a sense amplifier that amplifies the data read from the memory array 80.

Reference numeral 95 is a control signal input section for inputting a control signal given from the write control device. A decoder 96 decodes an address.

Reference numeral 97 is a register for holding an address. In the configuration of FIG. 4, the control signal for image processing and the address of the image data are input to the input port A (81), and the data of the memory array of the input address is read according to the control signal. That is, the address is held in the register 87 and decoded by the decoder 86. The data in the memory array designated by the decoded address is read by the reading unit 84, amplified, and output from the input port A (81).

On the other hand, when rewriting the data in the memory array, the control signal, the address and the write data are input to the input port B (91). The control signal is input to the control signal input unit 95, and the memory array (8
Write processing 0) is performed. That is, the address is held in the register 97 and decoded by the decoder 96.
The write data is held in the register 92, and written by the writing unit 93 into the address of the memory array (80) decoded by the decoder 96.

When reading the contents of the memory array, the address and control signal are input to the input port B (91). The control signal is input to the control signal input unit 95, and the address is input to the register 97. Then, the address is decoded by the decoder 96 according to the control signal, and the data of the address of the designated memory array 80 is read by the reading section 94, amplified, and output from the input port B (91).

FIG. 5 shows a second embodiment of the present invention. FIG. 5 shows a configuration in which the lookup table storage means is referred to by software.

In FIG. 5, reference numeral 90 is a look-up table reference unit, which is a look-up table storage means 60.
To refer to.

Reference numeral 191 denotes an R data reference section, which refers to the dual port SRAM 63 which holds the gradation value of the R component. 191 'is a G data reference part,
Dual-port SRAM 6 that holds the gradation value of G component
3 '.

Reference numeral 191 "is a B data reference portion, which refers to the dual port SRAM 63" which holds the gradation value of the B component. Example 1 of FIG. 3 other than the above configuration
Is the same as

In the configuration of FIG. 5, the image data is input from the image data input device 52 to the look-up table reference unit 90.
Is input to Then, by the R data reference unit 191,
The R component value of the dual port SRAM 63 is read by the address designating the lookup table of the R component. Similarly, the G data reference unit 191 ′ reads the G component value of the dual port SRAM 63 ′ at the address that specifies the G component lookup table. The dual port SRAM 6 is controlled by the address that specifies the B component lookup table by the B data reference unit 191 ".
The component value of 3 "is read.

Then, the respective reference parts 191, 191 ', 19
If necessary, the read display data of 1 ″ is subjected to image processing such as enlargement and reduction in the image processing unit 66.
Then, the display processing is performed by the image display processing unit 67 and displayed on the display device 53.

As in the case of FIG. 3, the contents of the look-up table storage means 60 are changed and read out by the image control device 74, and writing and reading can be performed in parallel with the image display processing.

[0073]

According to the present invention, the contents of the lookup table can be rewritten and read without interrupting the display of image data. Therefore, the image processing can be efficiently performed. Further, the method of writing the lookup table and reading the contents can be easily performed as compared with the conventional method.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 is a diagram illustrating the operation of the basic configuration of the present invention.

FIG. 3 is a diagram showing an embodiment (1) of the present invention.

FIG. 4 is a diagram showing a configuration of a dual boat SRAM.

FIG. 5 is a diagram showing an embodiment (2) of the present invention.

FIG. 6 is a diagram showing a conventional image processing apparatus.

FIG. 7 is an operation explanatory diagram of a conventional image processing apparatus.

[Explanation of symbols]

 1: Image processing device 2: Image data input device 3: Display device 4: Input device 10: Look-up table storage means 11: Input part A 11 ': Output part A 12: Input part B 12': Output part B 13: Storage unit 15: LUT input / output unit 16: LUT control unit

Claims (2)

[Claims] 1. A lookup table storage unit for storing a lookup table having a color component value of an image associated with an address, and inputting image data for designating a pixel color by an address of the lookup table, In an image processing device for converting the image data into display data having a color component value for each pixel according to a look-up table, a look-up table storage means includes an input unit for inputting the image data and a color component in the look-up table. An image processing apparatus having a plurality of input sections for inputting a value. 2. The image processing apparatus according to claim 1, wherein the look-up table storage means is a dual port SRAM.