JPH08249443A - Image display device - Google Patents

Abstract

PURPOSE: To continuously and smoothly change display screen when an interesting area is changed by supplying a reading address to a data storage means, switching an address generation mode according to the discrimination result by an image processing are discrimination means. CONSTITUTION: For the display image read from a data storage means 5, the interesting area is designated from an input means 1 and the coordinate data of the interesting area is held by an image processing are discrimination means 3. By the image processing are discrimination means 3, the address outputted from a display controller 8 is compared with the coordinate data set by the input means 1 and whether the coordinate which is being read is at the inside or the outside of the intereseting area is discriminated. A reading address generation means 4 selects the address mode according to discrimination data from plural reading address modes, based on this discrimination data. Thus, an image processing can be performed for the area set by the input means 1 by reading data from the date storage means 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly, to an image display device suitable for high-speed image processing and display of a part of an image.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 62-50966 has proposed an image display device for performing image processing (enlargement processing) and displaying the inside of a region of interest at an arbitrary position on an image. Figure 2
FIG. 1 is a block diagram of the image display device proposed in this publication. The input means 101 has a trackball, a joystick, a keyboard, or the like for designating a region of interest. Further, the graphic memory 103 stores a pattern of a region of interest such as a quadrangle or a circle, the work memory 105 stores an enlarged image, and the data storage unit 106 stores display image data. The display controller 102 reads data from the data storage means 106, the graphic memory 103, and the work memory 105, and displays the data on the display means 10.
The output to 7 is controlled. Further enlargement processing means 104
Recognizes the coordinates in the region of interest stored in the graphic memory 103, reads the image portion corresponding to the recognized coordinates in the image in the data storage means 106, and enlarges the read image portion. It is a thing.

The operation of the image processing (enlargement processing) of the region of interest in the image processing apparatus thus configured will be described. Image data is externally written in the data storage unit 106. The written image (main image) is read by the timing signal from the display controller 102, and the read main image is displayed on the display unit 107. Next, when the region of interest is set by operating the input means 101, the pattern of the region of interest in the graphic memory 103 is read out, and the read-out pattern is superimposed and displayed on the main image already displayed on the display means 107. To be done. In this state, the enlargement ratio is set by operating the input means 101. As a result, the enlargement processing unit 104 recognizes the coordinates of the region of interest. The main image portion corresponding to the coordinates in the region of interest recognized by the enlargement processing unit 104, that is, a part of the main image stored in the data storage unit 106 is recognized, and the recognized main image portion is displayed in the enlargement processing unit 104. Transferred.

Then, the enlargement processing means 104 enlarges the main image portion, and the result is the work memory 1.
05, and an enlarged image is formed in the work memory 105. Since the formed enlarged image is obtained by enlarging the main image portion corresponding to the coordinates in the region of interest, the area of the enlarged image is larger than that of the region of interest. Therefore, the enlargement processing unit 104 recognizes a portion corresponding to the area of the region of interest with the center of the enlarged image as a reference, and transfers only the recognized portion to the data storage unit 106. A part of the stored contents of the data storage means 106 is rewritten by the transferred enlarged image (a portion corresponding to the area of the region of interest), and an image in which a part of the main image is replaced with the enlarged image is displayed on the display means 107. .

Next, when the region of interest is moved, image data is again written to the data storage means 106 from the outside,
The above process is repeated.

[0006]

In the conventional image processing apparatus as described above, image data is externally transferred to the data storage means 106 every time the region of interest is moved, and the region corresponding to the region of interest is enlarged. Then, a part of the data storage means 106 is rewritten by the image data. Therefore, in such a processing method, it takes processing time each time the region of interest moves, and the display unit 107 does not display an image in which the region of interest continuously and smoothly changes. Each time the image is moved, the enlarged image in the region of interest after the movement is displayed with a slight interval, resulting in a jerky and difficult display.

It is an object of the present invention to solve the above problems and provide an image display device capable of continuously and smoothly changing the display screen when the region of interest is changed.

[0008]

A first image display device of the present invention which achieves the above object, comprises: (1-1) data storage means for storing image data; and (1-2) data read out from the data storage means. Display means for displaying an image based on the image data (1-3) Input means for setting at least one image processing area on the image displayed on the display means (1-4) Image from data storage means Image processing area determination means for determining whether or not the read address of data is an address corresponding to the image processing area (1-5) The image processing has at least two types of address generation modes having different address generation patterns. The read address generating means is provided for supplying the read address to the data storing means while switching the address generating mode according to the determination result by the area determining means. Characterized in that was.

Here, the image processing area discriminating means (1-4) described above is (1-4-1) the image data read address from the data storage means, which is set on the image by the input means. Image processing rectangular area discriminating means for discriminating whether or not the address corresponds to the rectangular area including the processing area (1-4-2) The read address of the image data from the data storing means is within the rectangular area. The image processing area table may store data indicating whether the address corresponds to the area outside the image processing area or the address corresponding to the image processing area.

In this case, the data of the image processing area table of (1-4-2) is composed of rewritable storage means, and further, table data updating means for updating the data of the image processing table is provided. It is preferable to provide. In the first image display device described above,
In the image data read from the data storage means of 1),
At least one selected from interpolation processing, gradation processing, filtering processing, and data conversion processing for superimposing and displaying an image processing area frame representing the outline of the image processing area on the image displayed on the display means. Image processing means for performing processing may be provided.

A second image display device of the present invention which achieves the above object is (2-1) first data storage means for storing image data (2-2) read out from the first data storage means. Second data storage means for storing the image data (2-3) Display means for displaying an image based on the image data read from the second data storage means (2-4) Displayed on the display means Input means for setting at least one image processing area on the image (2-5) Write address generating means for generating a write address of image data to the second data storage means (2-6) Write address generating means Image processing area discrimination means for discriminating whether or not the write address generated in step 1 is a corresponding address in the image processing area (2-7) Address generation patterns are different from each other. Both have two kinds of address modes, and are provided with read address generating means for supplying a read address to the first data storage means while switching the address generating mode according to the discrimination result by the image processing area discrimination means. To do.

Here, the (2-6) image processing area discrimination means is (2-6-1) an image in which the write address generated by the write address generation means is set on the image by the input means. Image processing rectangular area determining means for determining whether or not the image data corresponds to a rectangular area including a processing area (2-6-2) The read address of the image data from the first data storage means is a rectangular area. In the configuration, an image processing area table is stored which stores data indicating whether the address corresponds to an area outside the image processing area or an address corresponding to the image processing area. Good.

In this case, the image processing area table in (2-6-2) above is composed of rewritable storage means, and table data updating means for updating the data of the image processing table may be further provided. preferable. Also,
Also in the second image display device, similar to the first image display device, the image data read from the first data storage means in (2-1) is interpolated, gradation processed,
An image processing unit that performs at least one process selected from a filtering process and a data conversion process for superimposing and displaying an image processing region frame representing an outline of the image processing region on the image displayed on the display unit. You may prepare.

Further, in the first image display device or the second image display device, the read address generating means of (1-5) to (2-7) is set to (3-1) address generating mode. Addition / subtraction operation address generating means for sequentially accumulatively adding / subtracting the address increment / decrement to / from a predetermined initial address provided correspondingly. The configuration may include a switching device that selects one of a plurality of calculation results by the generating means.

[0015]

The first image display device of the present invention determines whether the region of interest (image processing region) is inside or outside and supplies the read address to the data storage means while switching the address generation mode. The image portion in the region of interest is read, for example, in an enlarged form directly from the data storage means and is sent to the display means for display. Therefore, when the region of interest moves, the read address is immediately changed accordingly, and the image data at the changed address is read and displayed. As described above, according to the first image display device of the present invention, after the region of interest is moved, the time until the image corresponding to the region of interest after the movement is displayed is extremely short, and the image is continuously displayed. Smooth screen display is possible.

Here, in determining the image processing area, the image processing rectangular area determination means of (1-4-1) is provided to first determine whether the image processing area is within the rectangular area, and if it is within the rectangular area. In addition, if it is configured such that it is determined whether the image processing area is within the image processing area by referring to the image processing area table of (1-4-2) above, the configuration of the image processing area determination means of (1-4) above can be simplified. Become. Furthermore, if this image processing area table is configured to be updatable and provided with table data updating means for updating the data of the image processing area table, it is possible to set an image processing area of any size and any shape. .

Further, the image data read from the data storage means may be subjected to interpolation processing or other various image processing, and the image data after the image processing may be sent to the display means, In that case, compared with the case where the same image processing is performed by the conventional image display device (see FIG. 21), even if the image processing itself requires the same processing time, the image displayed on the display means can be displayed in a short time. Can be updated.

Further, the second image display device of the present invention determines whether the region of interest (image processing region) is inside or outside, and supplies the read address to the first data storage means while switching the address generation mode. It is common to the first image display device, and is only to store the image data read from the first data storage means in the second data storage means and then send it to the display means. Differently, like the first image display device, continuous smooth screen display is possible.

Further, in the first image display device or the second image display device of the present invention, (1-5) to (2)
-7) The read address generating means is the same as in (3-1) above.
If the configuration is provided with the add / subtract operation address generating means and the switch of the above (3-2), there is a limitation that only rotation processing in units of 90 degrees can be performed when performing rotation processing when reading image data. I will receive it,
The structure of the read address generating means is simplified.

[0020]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of a first embodiment of a first image display device of the present invention. The input unit 1 is for setting a region of interest (image processing region), and the input unit 1 is provided with, for example, a mouse, a keyboard and the like. When the region of interest is set by the input unit 1, the image processing region discrimination unit 3 compares the coordinate position of the set region of interest with the address output from the display controller 8 to generate a mode identification signal of a read address. To do. Then, the read address generation means 4 changes the address generation mode based on the mode identification signal from the image processing area discrimination means 3 and reads the image data from the data storage means 5 for storing the image data. Generate an address. The image data read from the data storage means 5 is sent to the display means 7, and in the display means 7, the data storage means 5 is displayed.
An image based on the image data from is displayed. The display controller 8 controls the timing of reading data from the data storage means 5 and the timing of writing data to the display means 7.

Image data to be subjected to image processing is stored in the data storage means 5 in advance. The data stored in the data storage means 5 is read from the data storage means 5, sent to the display means 7, and displayed as an image on the display means 7. With respect to this display image, a region of interest is designated by the input unit 1, and the image processing region discriminating unit 3 holds the coordinate data of the region of interest. The coordinate data of the region of interest is set corresponding to the address (coordinates) of the data storage means 5,
The display controller 8 in the image processing area discrimination means 3
The address output from the above is compared with the coordinate (address) data set by the input means 1 to determine whether the coordinate currently being read is inside or outside the region of interest. The read address generating means 4 selects an address mode according to the discrimination data from a plurality of read address modes based on the discrimination data. Thus, by reading the data from the data storage unit 5, it becomes possible to perform image processing on the area set by the input unit 1. In the image processing device having such a configuration, since the coordinate conversion process is performed,
Enlarge, reduce, rotate images inside or outside the region of interest,
It is possible to perform image conversion processing (affine conversion) such as parallel movement.

FIG. 2 is a diagram showing an image when this image processing is performed. This figure shows a state in which the entire image on the left side is enlarged, and the circular portion is enlarged at another enlargement ratio. As described above, according to this embodiment, it is possible to easily perform separate image processing inside and outside the region of interest. Further, even when the region of interest moves, the original image data is stored in the data storage means 5 as it is, so only the image processing (image data reading processing) needs to be performed, which is faster than the conventional image processing. Is possible.

FIG. 3 is a block diagram of the second embodiment of the first image display device of the present invention, and FIG. 4 is a conceptual diagram of the image processing area table. In the second embodiment, when determining the coordinates (address) of the region of interest, it is first determined whether or not it is within a rectangular region including the region of interest, and the actual region of interest is controlled by the image processing area table 10. .

The image processing rectangular area discriminating means 13 holds the coordinate data of the rectangular area including the actual region of interest, and compares and discriminates this coordinate data with the address output from the display controller 8. Then, based on the discriminated rectangular area discrimination data, the ROI identification data for discriminating the inside and outside of the original ROI is generated in the image processing area table 10 as shown in FIG. In Figure 4, the data value is "
The portion of 0 "displays the main image, and the portion of which the data value is" 1 "is recognized as the region of interest, that is, the portion to be subjected to the image processing. Based on this identification data, it is read from the read address generating means 4. With such a configuration, the configuration of the image processing area discrimination means is simpler than that of the above-described first embodiment because the display scanning line (in the display means 7 in the first embodiment is Although the coordinates (address) of the identification determination of the region of interest change every horizontal direction), since the coordinates (address) are always the same in this second embodiment, the coordinate designating method from the input means 1 becomes simple, This is because the circuit structure is also simplified, and the image processing area table 10 in the second embodiment stores data in a non-rewritable and fixed manner.

FIG. 5 is a block diagram of the third embodiment of the first image display device of the present invention. The third embodiment is provided with an image processing area table 11 composed of a rewritable storage element (RAM, flash ROM, etc.) instead of the non-rewritable image processing area table 10 in the second embodiment. As in the second embodiment, the method of discriminating the region of interest is configured to be a rectangular region. In the second embodiment, the contents of the image processing area table cannot be rewritten, but in the third embodiment, the table data can be updated from the input means 1 through the table data updating means 20. This makes it possible to set a region of interest of any size and shape.

FIG. 6 is a block diagram of the fourth embodiment of the first image display device of the present invention. In the fourth embodiment, the interpolation processing means 30 for performing the interpolation processing on the image data read from the data storage means 5 is provided in the third embodiment described above. In the first to third embodiments, the image displayed on the display means 7 is an image based on the image data itself read from the data storage means 5. Therefore, when the image is enlarged, the image displayed on the display unit 7 tends to be a mosaic-like rough image because the same image data is lined up for a plurality of pixels. On the other hand, in the fourth embodiment, by providing the interpolation processing means 30, it becomes possible to obtain smooth enlarged image data by referring to the read address from the read address generating means 4.

Bilinear interpolation processing is a typical example of such interpolation processing. FIG. 7 is a principle diagram of the bilinear interpolation processing. In FIG. 7, x1, x2, y
1, 1 and 2 represent coordinates, and Δx and Δy represent distances. Generally, the bilinear interpolation processing is obtained by the following calculation. Here, ‖x2-x1‖ represents the distance between x1 and x2, and f represents the data value.

[0028]

[Equation 1]

As coefficient data,

[0030]

[Equation 2]

Calculating in advance, these coefficient data always satisfy 0 ≦ CFX and CFY <1.0. In this case, the above equation can be modified as follows. P = A * (1-CFX) + C * CFX Q = B * (1-CFX) + D * CFX T = P * (1-CFY) + Q * CFY In bilinear interpolation processing, the above calculation is performed. In the bilinear interpolation processing, four points of data are required as described above. Therefore, the read address generating means 4 generates read addresses so that four addresses can be designated.

FIG. 8 is a block diagram of the fifth embodiment of the first image display device of the present invention. In the fifth embodiment, a gradation processing means 40 for applying gradation processing to the image data read from the data storage means 5 is added to the third embodiment shown in FIG. With this configuration, it is possible to set the tone characteristics inside and outside the region of interest separately. FIG. 9 is a configuration diagram of a sixth embodiment of the first image display device of the present invention.

In the sixth embodiment, the filter processing means 50 for applying the filtering processing to the image data read from the data storage means is added to the third embodiment shown in FIG. This makes it possible to set the filter characteristics inside and outside the region of interest separately. Such filtering processing includes contour line extraction, edge enhancement, smoothing processing, binarization processing, thinning processing, and the like.

FIG. 10 is a block diagram of the seventh embodiment of the first image display device of the present invention. In this seventh embodiment, FIG.
In the third embodiment shown in FIG. 3, an image processing area for performing a data conversion process for displaying the image data read from the data storage means by superimposing an image processing area frame on the image displayed on the display means 7 is displayed. The frame display means 60 is added.
This makes it possible to clearly display the boundary of the region of interest.

Next, an embodiment of the second image display device of the present invention will be described. FIG. 11 is a block diagram of the first embodiment of the second image display device of the present invention. The first embodiment is different from the first embodiment of the first image display device described above in that a second data storage means 6 for temporarily storing data after image processing is provided. The display unit 7 displays an image based on the image data read from the storage unit 6 in the second data.

When the input means 1 is operated, a region of interest is designated. The write address generating means 2 generates a write address for writing the image data read out from the first data storage means 5 into the second data storage means. Means 1
The coordinate data of the region of interest set in 1 is compared with the address output from the write address generating means 2, and a mode identification signal of a read address when image data is read from the first data storage means 5 is generated. Then
The read address generating means 4 is the image processing area determining means 3
The address generation mode is changed based on the mode identification signal from to generate a read address for reading the image data from the data storage means 5. The image data read from the first data storage means 5 is once stored in the second data storage means 6, then read from the second data storage means 6 and sent to the display means 7. Display means 7
, An image based on the image data from the second data storage means 6 is displayed. Further, the display controller 8 controls the timing of reading data from the second data storage means 6 and the timing of writing data to the display means 7.

The image data to be subjected to the image processing is stored in the first data storage means 5 in advance, and further transferred to the second data storage means 6 to be stored in order to display the image. The image data stored in the second data storage means 6 is read from the second data storage means 6, sent to the display means 7, and displayed on the display means 7 as an image. For this display image, the region of interest is designated from the input means 1,
The image processing area discrimination means 3 holds the coordinate data of the region of interest. The coordinate data of the region of interest is set corresponding to the address (coordinates) of the second data storage means 6, and the address output from the write address generation means 2 in the image processing area discrimination means 3 and the input means 1 are set. The coordinate (address) data that has been written is compared, and it is determined whether the coordinate for which the writing process is currently being performed is inside or outside the region of interest. The read address generating means 4 selects an address mode corresponding to the discrimination mode from a plurality of read address modes based on the discrimination data. As a result, when the image data is read from the first data storage means 5 and written in the second image data storage means 6, image processing can be performed on the inside or outside of the region of interest set by the input means 1. It will be possible. Since the image processing apparatus having such a configuration is performing image conversion processing, it is possible to perform image conversion processing (affine transformation) such as enlargement, reduction rotation, and parallel movement of the image inside the region of interest. Is.

FIG. 12 is a diagram showing an image when this image processing is performed. This figure shows a state in which the entire image on the left side is enlarged, and the circular portion is enlarged at another enlargement ratio. As described above, according to this embodiment, it is possible to easily perform separate image processing inside and outside the region of interest. Further, even when the region of interest moves, the original image data is stored in the first image data storage means 5 as it is, so only the image processing (reading / writing processing) is required, which is faster than the conventional one. Image processing becomes possible.

FIG. 13 is a block diagram of the second embodiment of the second image display device of the present invention. In the second embodiment, when determining the coordinates (address) of the region of interest, it is first determined whether or not it is within a rectangular region including the region of interest, and the actual region of interest is controlled by the image processing area table 10. is there.
The image processing rectangular area discriminating means 13 holds the coordinate data of the rectangular area including the actual region of interest, and this coordinate data,
The address output from the write address generating means 2 is compared and determined. Then, based on the determined rectangular area discrimination data, the image processing area table 10 as shown in FIG.
Then, the ROI identification data for identifying the inside and outside of the original ROI is generated. Based on this identification data, the read address is generated by the read address generating means. With such a configuration, the configuration of the image processing area determination means is simpler than that of the first embodiment described above. This is because the coordinates (address) of the identification determination of the region of interest change in the writing scanning line (horizontal direction) to the first data storage means 6 in the first embodiment, but are always the same in the second embodiment. Since the coordinates (address) are used, the method of designating the coordinates from the input means 1 is also simplified, and the circuit configuration is also simplified. In the image processing area table 10 in the second embodiment, data is fixedly stored in a non-rewritable manner.

FIG. 14 is a block diagram of the third embodiment of the second image display device of the present invention. In the third embodiment, the second
Instead of the non-rewritable image processing area table 10 in the embodiment, an image processing area table 11 constituted by a rewritable storage element (RAM, flash ROM, etc.)
As in the second embodiment, the method of discriminating the region of interest is configured to be performed in the rectangular region. Second
In the embodiment, the contents of the image processing area table cannot be rewritten, but in the third embodiment, the table data can be easily updated from the input means 1 through the table data updating means 20. This makes it possible to set a region of interest of any size and shape.

FIG. 15 is a block diagram of the fourth embodiment of the second image display device of the present invention. In the fourth embodiment, the image data read from the first data storage means 5 is interpolated between the first data storage means 5 and the second data storage means 6 in the third embodiment. An interpolation processing means 30 for performing processing is provided. In the first to third embodiments, the image data written in the second data storage means 6 is an image based on the image data itself read from the first data storage means 5. Therefore, when the image enlargement process is performed, the same image data is continuously written in the second data storage unit 6 for a plurality of pixels, and when this is read and the image is displayed on the display unit 7, The displayed image tends to be a rough mosaic image. On the other hand, in the fourth embodiment, by providing the interpolation processing means 30, it becomes possible to obtain smooth enlarged image data by referring to the read address from the read address generating means 4.

FIG. 16 is a block diagram of the fifth embodiment of the second image display device of the present invention. This fifth embodiment is shown in FIG.
Gradation processing for performing gradation processing on the image data read from the first data storage means 5 between the first data storage means 5 and the second data storage means 6 in the third embodiment shown in FIG. The means 40 is provided. With this configuration, it is possible to set the tone characteristics inside and outside the region of interest separately.

FIG. 17 is a block diagram of the sixth embodiment of the second image display device of the present invention. This seventh embodiment is shown in FIG.
The filter processing means 50 for performing the filtering processing on the image data read from the first data storage means 5 between the first data storage means 5 and the second data storage means 6 in the third embodiment shown in FIG. Is provided. This makes it possible to set the filter characteristics inside and outside the region of interest separately. Such filtering processing includes contour line extraction, edge enhancement, smoothing processing, binarization processing, thinning processing, and the like.

FIG. 18 is a block diagram of the seventh embodiment of the second image display device of the present invention. This seventh embodiment is shown in FIG.
Data conversion for displaying an image displayed on the display unit 7 by superimposing an image processing area frame between the first data storage unit 5 and the second data storage unit 6 in the third embodiment shown in FIG. An image processing area frame display means 60 for performing processing is provided. This makes it possible to clearly display the boundary of the region of interest.

FIG. 19 is a block diagram showing an example of the read address generating means. In each of the above-described embodiments, the internal configuration of the read address generating means 4 is not particularly referred to, and it is assumed that the read address generating means 4 can generate any kind of address pattern. In that case, the read address generating means 4 has an ALU (Ar
It is necessary to provide an arithmetic logical unit) to perform arithmetic processing. On the other hand, in this embodiment, the rotation processing can be performed only in units of 90 degrees, but the internal structure of the read address generating means 4 is simplified.

The read address generating means is provided with a plurality of address generators, and each address generator has an adder / subtractor 201, ...
211, switching devices 202, ..., 212 for switching the initial address and the added / subtracted address, and registers 203 ,. The outputs from the plurality of address generators are input to the switch 220, and the switch 220 selects and outputs the read address from the plurality of inputs. The read start address is transferred to the registers 203, ..., 21 via the switches 202 ,.
Held at 3. The adder / subtractor 201, ..., 211 adds and subtracts the address held in the register 203, 213 and the differential address, and the result is the switcher 202 ,.
It is held in the registers 203, ..., 213 via 2. By repeating this at every read address generation timing (clock), read addresses are sequentially generated. The address obtained here divides the inside and outside of the rectangular area, and is the area of interest (image processing area).
The inside and the outside are distinguished by the switching device 220 by the control data from the image processing area table, and the switching address is output from the switching device 220 according to the inside and outside of the image processing area. In this configuration, it is possible to obtain addresses for scanning the image in any of eight directions as shown in FIG.

Although the respective constituent elements have been described separately in the above embodiments, complex image processing can be performed at high speed by combining the respective processing elements and performing the pipeline processing.

[0048]

As described above, according to the present invention,
With an inexpensive structure, it is possible to perform different image processing inside the image processing area and outside the image processing area, or to perform different image processing at a high speed when there are a plurality of image processing areas. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of a first image display device of the present invention.

FIG. 2 is a diagram showing an image when image processing is performed.

FIG. 3 is a configuration diagram of a second embodiment of the first image display device of the present invention.

FIG. 4 is a conceptual diagram of an image processing area table.

FIG. 5 is a configuration diagram of a third embodiment of the first image display device of the present invention.

FIG. 6 is a configuration diagram of a fourth embodiment of the first image display device of the present invention.

FIG. 7 is a principle diagram of bilinear interpolation processing.

FIG. 8 is a configuration diagram of a fifth embodiment of the first image display device of the present invention.

FIG. 9 is a configuration diagram of a sixth embodiment of the first image display device of the present invention.

FIG. 10 is a configuration diagram of a seventh embodiment of the first image display device of the present invention.

FIG. 11 is a configuration diagram of a first embodiment of a second image display device of the present invention.

FIG. 12 is a diagram showing an image when image processing is performed.

FIG. 13 is a configuration diagram of a second embodiment of the second image display device of the present invention.

FIG. 14 is a configuration diagram of a third embodiment of the second image display device of the present invention.

FIG. 15 is a configuration diagram of a fourth embodiment of the second image display device of the present invention.

FIG. 16 is a configuration diagram of a fifth embodiment of the second image display device of the present invention.

FIG. 17 is a configuration diagram of a sixth embodiment of the second image display device of the present invention.

FIG. 18 is a configuration diagram of a seventh embodiment of the second image display device of the present invention.

FIG. 19 is a block diagram showing an example of a read address generating means.

20 is a diagram showing various scanning directions in the read address generating means shown in FIG.

FIG. 21 is a configuration diagram of a conventionally proposed image display device.

[Explanation of Codes] 1 Input Means 2 Write Address Generation Means 3 Image Processing Area Discrimination Means 4 Read Address Generation Means 5 Data Storage Means 6 Second Data Storage Means 7 Display Means 8 Display Controllers 10, 11 Image Processing Area Tables 13 Images Processing rectangular area discrimination means 20 Table data updating means 30 Interpolation processing means 40 Gradation processing means 50 Filter processing means 60 Image processing area frame display means

Claims (9)

[Claims] 1. A data storage unit for storing image data, a display unit for displaying an image based on the image data read from the data storage unit, and at least one on the image displayed on the display unit. Input means for setting an image processing area, image processing area determining means for determining whether or not a read address of image data from the data storage means is an address corresponding to the image processing area, and address generation Read address generation means for supplying a read address to the data storage means while switching the address generation mode in accordance with the discrimination result by the image processing area discrimination means. An image display device characterized by being provided. 2. The image processing area discrimination means, the read address of the image data from the data storage means corresponds to a rectangular area on the image including the image processing area set by the input means. An image processing rectangular area discriminating means for discriminating whether or not it is an address, and a read address of the image data from the data storing means is an address corresponding to an area inside the rectangular area, which is outside the image processing area. The image display device according to claim 1, further comprising: an image processing area table that stores data indicating whether there is a certain address or a corresponding address in the image processing area. 3. The image display according to claim 2, wherein the image processing area table is composed of rewritable storage means, and table data updating means for updating data of the image processing table is provided. apparatus. 4. An image processing area frame representing an outline of the image processing area in an image displayed on the display means, on interpolation processing, gradation processing, filtering processing on the image data read from the data storage means. 4. The image display device according to claim 1, further comprising image processing means for performing at least one process selected from data conversion processes for superimposing and displaying. . 5. A first data storage means for storing image data, a second data storage means for storing image data read from the first data storage means, and a second data storage means. Display means for displaying an image based on the image data read from the display means, input means for setting at least one image processing area on the image displayed on the display means, and the second data storage means Address generating means for generating a write address of image data to the image processing area, and an image processing area determining means for determining whether or not the write address generated by the write address generating means is an address corresponding to the image processing area. Means and at least two types of address generation modes whose address generation patterns are different from each other. An image display device, comprising: a read address generation means for supplying a read address to the first data storage means while switching the address generation mode in response thereto. 6. The image processing area discrimination means, wherein the write address generated by the write address generation means corresponds to a rectangular area on the image including the image processing area set by the input means. An image processing rectangular area discriminating means for discriminating whether or not it is image data, and a read address of the image data from the first data storing means is in an area outside the image processing area in the rectangular area. The image display device according to claim 5, further comprising an image processing area table in which data indicating whether the address is a corresponding address or an address corresponding to the image processing area is stored. 7. The image display according to claim 6, wherein the image processing area table is composed of rewritable storage means, and table data updating means for updating data of the image processing table is provided. apparatus. 8. An image representing an outline of the image processing area in an image displayed on the display means, on the image data read from the first data storage means, in an interpolation process, a gradation process, a filtering process. 8. The image processing means for performing at least one process selected from data conversion processes for displaying a processing area frame in a superimposed manner, according to any one of claims 5 to 7. Image display device. 9. The add / subtract operation address generating unit for sequentially adding and subtracting the address increment / decrement to and from a predetermined initial address, the read address generating unit being provided corresponding to the address generating mode, and the image processing. 9. A switching device for selecting one of a plurality of calculation results by a plurality of addition / subtraction calculation address generating means in accordance with a determination result by the area determining means, and a switching device. The image display device according to item 1.