JP2017167216A - Image processing device, image processing method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing device that performs processing for scroll display and that reduces a flicker.SOLUTION: An image processing device has: a display memory 28; reception parts 21, 22 which receive image data of a plurality of input lines; display memory interfaces 23-27, and 29 which write the received image data of the plurality of input lines to generate display data while making a shift in line position following the plurality of input lines of the received image data, and read display data out of the display memory corresponding to the scroll display to correspond to the scroll display while sequentially shifting a line range of a read of image data of one screen of the display data written to the display memory; output parts 30, 31 which output the image data of the read one screen to a display device; and image data correction parts 60, 61 which correct the image data of respective lines of the image data of one screen according to image data of the plurality of lines right before the lines.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an image processing apparatus, an image processing method, and a program.

  A console device for a ship searches the water by sound waves with a sound wave sensor (sonar), and displays the result on a display screen. The methods used to display acoustic exploration results include LOFAR (Low Frequency Analyzing and Recording) and BTR (Bearing Time Recording), with one axis as the azimuth axis and the other axis (vertical axis) as the time axis. The display scrolls along the time axis. Along the azimuth axis, whether or not an object exists in each azimuth is displayed. In some cases, one of the axes is a frequency axis. Here, the case of an azimuth axis will be described as an example.

  The detection signal of the sonic sensor (sonar) is subjected to various frequency processing (for example, FFT (Fast Fourier Transform), wavelet Transform)) by the image generation device, and image data for a plurality of pixel rows (lines) is generated. And transmitted to the image processing apparatus. The image processing apparatus generates image data for one screen by combining the received image data for several lines into image data for scroll display and other image data (other measurement values, etc.) The image is transmitted to an image display device such as a liquid crystal display device. The image display device displays the received image data for one screen on the display screen.

  In the case of scroll display, if the display position is changed by the number of display lines corresponding to several lines of image data received by the image processing apparatus, a non-smooth scroll display is obtained. Therefore, smooth scrolling is performed by gradually changing the display change due to scrolling for each display frame. For example, the image display apparatus displays at 30 frames / s, and if the scroll speed is 30 pixels / s, the image data for several pixel rows received by the image processing apparatus is 1 for each display frame. The image data is changed pixel by pixel. Thereby, a smooth scroll display can be performed.

JP 2010-250173 A JP 2010-2898 A

  However, when the scroll display as described above is performed, flicker (flickering due to blinking of light (luminance)) is felt by the operator (operator), and the burden on the eyes is increased for the operator who monitors the screen for a long time. It turned out to be a factor.

  An object of the present invention is to reduce flicker in an image processing apparatus that performs processing for scroll display.

  The program of the first aspect receives image data of a plurality of input lines, and forms display data while shifting the position of the received image data of the plurality of input lines so as to follow the image data of the plurality of input lines received last time. The computer stores the process and executes the process. Further, the computer is caused to execute a process of reading the image data for one screen of the display data received and stored a plurality of times so as to correspond to the scroll display while sequentially shifting the row range to be read. Further, the image data of each line in the image data for one screen is corrected in accordance with the image data of a plurality of immediately preceding lines, and the corrected image data for the one screen is output.

  The image processing apparatus according to the second aspect includes a display memory, a receiving unit that receives image data of a plurality of input rows, a display memory interface, an output unit, and an image data correction unit. The display memory interface writes the received image data of the plurality of input lines into the display memory so as to form display data while shifting the row position so as to follow the image data of the plurality of input lines received last time. The display memory interface reads the display data from the display memory so as to correspond to the scroll display while sequentially shifting the line range for reading the image data for one screen of the display data written in the display memory received a plurality of times. The output unit outputs the read image data for one screen to the display device. The image data correction unit corrects the image data of each row in the image data for one screen according to the image data of a plurality of immediately preceding rows.

  The image processing method of the third aspect receives image data of a plurality of input lines, and displays the received image data of the plurality of input lines while shifting the row position so as to follow the image data of the plurality of input lines received last time. Remember to form. Further, the image data for one screen of the display data received and stored a plurality of times is read so as to correspond to the scroll display while sequentially shifting the row range to be read, and the image data of each row in the image data for one screen is read. The correction is made according to the image data of a plurality of immediately preceding lines. Further, the corrected image data for one screen is output.

  According to the present invention, flicker in a processed image can be reduced in image processing for receiving and scrolling display of image data for several pixel rows.

It is a figure which shows schematic structure of the console apparatus for displaying the search result in the water by a sound wave sensor (sonar), (A) is a figure which shows the whole structure, (B) is a figure which shows schematic structure of an image processing apparatus. It is a figure which shows the example of the display image displayed on a sonar screen. A state in which an image of several pixel lines is shifted and displayed is shown. It is a figure explaining the operation | movement which performs smooth (smooth) scroll by changing the image for several lines gradually for every display frame. FIG. 5 is a diagram for explaining a writing / reading operation with respect to a VRAM of the image processing apparatus when the smooth scroll display shown in FIG. 4 is performed. It is a flowchart which shows the processing operation in an image processing apparatus. It is a figure explaining the generation | occurrence | production principle of a flicker. It is a block diagram which shows schematic structure of the image processing apparatus of embodiment. It is a figure explaining the process which the filter process part of a synthetic | combination part performs. It is a figure which shows the structure in the case of implement | achieving filter processing in arithmetic processing apparatuses, such as DSP, explaining the filter process in a filter process part. 3 is a flowchart illustrating a processing operation in the image processing apparatus according to the embodiment.

  Before describing the embodiment, an image processing apparatus for displaying a search result in water by a sound wave sensor (sonar) on a console device for a ship will be described.

  FIG. 1 is a diagram showing a schematic configuration of a console device for displaying a search result in water by a sound wave sensor (sonar), where (A) shows an overall configuration, and (B) shows a schematic configuration of an image processing device. FIG.

  As shown in FIG. 1A, the console device for a ship includes a sensing device 10, an image generation device 11, an image processing device 20, and an image display device 12. The sensing device 10 includes, for example, a row of sound wave sensors including a plurality of sound wave sensors arranged according to the direction, and detects an object in a predetermined direction range in water. Furthermore, there are some which have a plurality of such acoustic wave sensor rows, and the resolution in the direction perpendicular to the azimuth (the elevation angle direction) is improved by making the detection direction of the acoustic wave sensors in each row different. In addition, there is one that improves the resolution in the elevation direction by changing the detection direction of one row of acoustic wave sensors.

  The image generation device 11 receives a detection signal from the sensing device 10 and performs frequency processing (for example, FFT (Fast Fourier Transform), wavelet (Wavelet Transform)) to obtain image data for several pixel rows (several lines). Generate. The generated data for several lines including timing information is transmitted to the image processing apparatus 20.

  The image processing device 20 connects the image for several lines of the received generated data to the image data for scroll display by connecting the image after the previously received image, and matches other image data (other measurement values, etc.). Then, image data for one screen is generated and transmitted to an image display device such as a liquid crystal display device. Since other image data is not directly related to the present invention, processing related to image data displayed on the sonar screen will be described below. The image processing apparatus 20 includes an arithmetic processing element (computer) including an arithmetic processing element such as a CPU, a DSP, and an FPGA, a storage element such as a ROM, a RAM, and a VRAM, and an IF element such as a DVI communication element and an I / O element. Realized by installing the program.

  The image display device 12 displays the received image data for one screen on the display screen. The display screen includes a sonar screen 13 that displays a sonar image, a first information display screen 14 that displays first information and second information other than the sonar image, and a second information display screen 15. For example, the first information is measurement value information (speed, traveling direction, etc.) detected by instruments other than the sonar, and the second information is transmission information. As will be described later, here, the sonar image is scroll-displayed on the sonar screen 13.

  As shown in FIG. 1B, the image processing apparatus 20 includes a generated data reception unit 21, a timing extraction unit 22, a timing control unit 23, a writing / reading control unit 24, a reception buffer 25, RGB -YUV conversion unit 26. The image processing apparatus 20 further includes a VRAM-IF 27, a VRAM 28, a YUV-RGB conversion unit 29, a DVI encoder 30, and a DVI transceiver 31.

  The generation data receiving unit 21 terminates and receives the generation data, and inputs RGB image data together with a timing signal. As described above, several lines of image data are received at a time. The timing extraction unit 22 decodes the generated data and separates the received generated data from the reception timing signal and the image data. The timing control unit 23 extracts a control signal such as a frame or a line from the reception timing signal, and generates a control signal for controlling each unit. The writing / reading control unit 24 has a pixel position register 32 for storing pixel position information including a writing address for writing image data to the VRAM 28 determined from frame and line control signals and a reading address for reading image data from the VRAM 28.

  The reception buffer 25 is a buffer for writing the image data separated by the DVI decoder 22 to the VRAM 28, has a capacity of at least two pixel rows (two lines), and has a DVI reception clock and an operation clock for the image processing device 20. To absorb the difference. The RGB-YUV conversion unit 26 converts the RGB color image data generated by the image generation device 11 into YUV color image data.

  The VRAM-IF 27 is an interface for writing / reading data to / from the VRAM 28. The VRAM 28 is a video RAM, and is formed of a video RAM that can write data to the VRAM 28 and read data from the VRAM 28 in parallel. The image data is stored for scroll display. The YUV-RGB conversion unit 29 converts YUV color image data into RGB color image data. The DVI encoder 30 encodes the converted RGB color image data together with a reproduction timing signal to generate a DVI (Digital Video Interface) signal. The DVI transceiver 31 outputs a DVI signal to the image display device 12. The RGB-YUV conversion unit 26 and the YUV-RGB conversion unit 29 are not provided in a configuration that does not particularly use the luminance information of the image data, and the RGB color image data can also be stored in the VRAM 28.

  In the above configuration, since the configurations of the console device and the image processing device 20 are widely known, detailed description thereof will be omitted, and only portions directly related to the embodiment will be described.

FIG. 2 is a diagram illustrating an example of a display image displayed on the sonar screen 13.
As mentioned above, LOFAR (Low Frequency Analyzing and Recording) and BTR (Bearing Time Recording) are the methods used to display the results of acoustic exploration. One axis is the azimuth axis and the other axis (vertical axis) Is the time axis, and the display scrolls along the time axis. Along the azimuth axis, whether or not an object exists in each azimuth is displayed. In FIG. 2, the horizontal axis is the azimuth, and for example, image data representing an object detected in a range of ± 180 ° is displayed with the bow direction being 0 °. The image data represents an image of several pixel rows (lines). The vertical axis is the time axis, and images for several lines are displayed so as to scroll along the time axis. As described above, one axis may be the frequency axis.

  For example, in FIG. 2, the image in the azimuth direction is constant after time T, and this is held in the same direction, and it is considered that a fixed object is detected. Prior to time T, the image in the azimuth direction has a similar shape, but is shifted in the horizontal direction, and the amount of shift changes slowly. This is probably because the bow is turning.

  As shown in FIG. 2, the displayed image is an image in units of several lines. This is because, as described above, various frequency processing is performed on the detection signal by the image generation device 11, image data for several lines is generated and transmitted to the image processing device 20.

FIG. 3 shows a state in which images for several lines are shifted and displayed. Note that the sonar screen 13 has t pixel rows (t lines).
As shown in FIG. 3A, an image A corresponding to several lines (n lines) of image data output by the image generating device 11 is displayed on several lines (n lines) on the lower side of the sonar screen 13. As shown in FIG. 3B, when displaying the image B corresponding to the next several lines (n lines) of image data output by the image generation device 11, the image is displayed on the lower n to 2n-1 lines. Display image A on lines 0 to n−1. Such an operation is repeated. As shown in FIG. 3C, when displaying the image M corresponding to the image data for n lines output by the image generating device 11, the image M is displayed on the lower 0 to n-1 lines, The image A is displayed on the t-1-2n to t-1-n lines, and the image B is displayed on the t-1-3n to t-1-2n lines. Further, as shown in FIG. 3D, the image N is placed on the lower 0-n-1 line, the image M is placed on the n-2n-1 line, and the upper t-1-n-t-1 line. Image A and image B on the t-1-2n to t-1-n lines.

  Here, if the cycle in which the image generation apparatus 11 outputs image data of several (n) lines is m times / s, m × n line image data is displayed per second, and the scroll speed is m × n lines / second. s. Further, when the scroll speed is represented by the time for the image to move from the bottom to the top on the sonar screen 13, it is t / mn seconds. In the following description, the scroll speed is represented by m × n lines / s. Although not generally, the scroll speed may be higher than m × n lines / s. For example, when the scroll speed is 2 m × n lines / s, one line of image data is divided into two adjacent lines. Write. In some cases, the scroll speed is slower than m × n lines / s. For example, when the scroll speed is set to m × n lines / 2s, two lines of image data are thinned out or the average of the two lines of image data is calculated. One line of image data.

  However, as described above, every time the image generating apparatus 11 outputs n lines of image data, if the display position is changed so as to shift the image by n lines, a non-smooth scrolling display is obtained. Therefore, smooth scrolling is performed by gradually changing the display change due to scrolling for each display frame.

FIG. 4 is a diagram for explaining an operation of performing smooth (smooth) scrolling by gradually changing an image for a plurality of lines for each display frame.
The image data 16 output at a time by the image generation device 11 is for n lines (here, 6 lines), and one line is represented by reference numeral 18. In a certain display frame, the image on the sonar screen 13 is shifted upward by one line, and the image data of the sixth line among the six lines is displayed on the lowermost line of the sonar screen 13. In the next display frame, the image of the sonar screen 13 is further shifted upward by one line, and the image data of the fifth and sixth lines of the six lines are shifted to the bottom line and the next line of the sonar screen 13. Is displayed. Thereafter, after six display frames, six lines of the image 16 are displayed on the bottom six lines of the sonar screen 13. Thereby, smooth scroll display is realized.

FIG. 5 is a diagram for explaining the writing / reading operation with respect to the VRAM 28 of the image processing apparatus 20 when the smooth scroll display shown in FIG. 4 is performed.
As shown in FIG. 5, the VRAM 28 has a memory area 40 that stores image data corresponding to each line in the scroll direction of the sonar screen 13. The number of lines in the memory area 40 is the number of lines obtained by adding the number of image data lines n (n = 4 in FIG. 5) output at one time to the number t of display lines on the sonar screen 13. In FIG. 5, reference numeral 41 indicates a memory area 41 for one line.

  As shown in FIG. 5, when the number of lines R0 is read from the upper lines (R0 + 2n-1 to 2n) from the memory area 40, the image processing apparatus 20 newly receives image data for four lines, and the memory area The write operation WB to 40 is started. Write operation WB is performed from 0 to n-1. When the display of the number of lines R0 is completed, the line position to be read is shifted by 1, RA1 for reading R0 + 2n-2 to 2n-1 is performed, RA2 and RA3 are further performed, and RA4 for reading 2n-4 (= 4) from R0 + 2n-5 is read. I do. During this time, the write operation WB from 0 to n-1 is completed. Then, the image processing apparatus 20 newly receives image data for four lines, and starts a write operation WC from R0 + 2n−1 to R0 + n−1 in the memory area 40.

  When RA4 is completed, the line position to be read is shifted by 1, RB1 for reading from R0 + n-1 to n-1 is performed, RB2 and RB3 are further performed, and RB4 for reading n-4 (= 0) from R0 + n-4 is performed. During this time, the write operation WB from 0 to n-1 is completed. By repeating the above operation, the writing operation and the reading operation with respect to the memory area 40 are performed cyclically, and the smooth scroll display described with reference to FIG. 4 can be performed.

  In order to perform the operation described with reference to FIG. 5, the pixel position information held in the pixel position register 32 of the writing / reading control unit 24 includes a read operation start address and a write operation start address. The start address of the read operation is updated by 1 every frame rewrite, the start address of the write operation is updated by 4, and when the lowest address value (= 0) is reached, it is updated to the maximum value (R0 + 2n-1). .

FIG. 6 is a flowchart showing the processing operation in the image processing apparatus 20.
In step S <b> 10, the generation data receiving unit 21 receives image generation data for several pixel rows (lines) from the image generation apparatus 11. The generation data is received periodically.

  In step S <b> 11, the timing extraction unit 22 performs processing for extracting timing from the received generated data, the image data is stored in the reception buffer 25, and the extracted timing information is stored in the timing control unit 23.

  In step S12, the RGB-YUV conversion unit 26 converts the image data stored in the reception buffer 25 from RGB color image data to YUV color image data.

  In step S13, the VRAM-IF 27 receives the YUV color image data, and writes (stores) the YUV color image data in the VRAM 28 from the start address of the writing operation held in the pixel position register 32.

  In step S <b> 14, the VRAM-IF 27 controls the read timing, and then reads the image data stored in order from the read operation start address held in the pixel position register 32 from the VRAM 28. Furthermore, the VRAM-IF 27 performs image composition by reading first information and second information other than a sonar image (not shown) stored in the VRAM 28 so as to form a display screen.

In step S15, the YUV-RGB conversion unit 29 converts the YUV color image data obtained by image synthesis into RGB color image data.
In step S16, the DVI encoder 30 encodes the RGB color image data and converts it into DVI image data.

  In step S <b> 17, the DVI transceiver 31 transmits the encoded DVI image data to the image display device 12.

  The configuration and operation of the image processing apparatus for displaying the underwater search result by the general ship console apparatus and the sound wave sensor (sonar) have been described above. Since these structures and operations are widely known, further detailed description is omitted.

  The image generation device 11 frequency-processes the detection signal of the sound wave sensor (sonar) to generate image data for several pixel rows (lines). And a unique stripe as shown in FIG. 2 appears. For example, when image data for 10 lines is output, the odd-numbered lines have higher brightness than the even-numbered lines, and a specific line (for example, the fifth line) among the odd-numbered lines is the other line. The brightness is particularly higher than the line. Further, the luminance is not particularly high in one line, and a plurality of lines (for example, the third and seventh lines) may have higher luminance than the other lines. This shows the same tendency with several lines of image data output from the image generation apparatus.

  When the image data in which stripes appear as described above are scroll-displayed, the operator (operator) feels flickering (flickering due to blinking of light (luminance)), and the burden on the eyes for the operator who monitors the screen for a long time It turned out to be a factor to increase. This cause will be considered below.

FIG. 7 is a diagram illustrating the principle of flicker generation.
Assume that the image generation device 11 generates image data for six lines and transmits the image data to the image processing device 20, and a high-luminance line appears on the fourth line of the image data for six lines. In FIG. 7, it is assumed that image data 16 for six lines is displayed in order on the sonar screen 13 so that the luminance of the line 19 of the fourth line out of the six lines is high. The sonar screen 13 is rewritten at 30 frames / s, and the scroll display is performed so that the one-line display position is shifted upward for each frame.

  As shown in FIG. 7, a line with high luminance moves upward every 1/30 seconds. When attention is paid to a certain line in the sonar screen 13, if the line is scrolled by 6 lines, that is, every 1/5 second, a line with high luminance appears again. In other words, a high-brightness line appears in each line at a period of 1/5 second. This change is a periodic position change in the range of 6 lines of the high-brightness line, because the high-brightness line moves to the adjacent upper position, so that each line does not blink independently. . It is known that humans feel flicker with blinking with a period of 1/20 second to a fraction of a second, and the periodic position change in a certain range of the above-described high-brightness line is flickering. It is thought to be the cause of

In the embodiments described below, an image processing apparatus for performing scroll display with reduced flicker is disclosed.
The image processing apparatus according to the embodiment is used in a console device that displays an underwater search result by a ship-borne acoustic sensor (sonar) shown in FIG. Therefore, the image processing apparatus of the embodiment receives generation data including image data for several pixel rows (lines) from the image generation apparatus 11. The image processing apparatus according to the embodiment converts the received image data for several lines into image data for scroll display, generates image data for one screen including other image data, and sends the image data to the image display apparatus 12. Send.

FIG. 8 is a block diagram illustrating a schematic configuration of the image processing apparatus according to the embodiment.
As shown in FIG. 8, the image processing apparatus according to the embodiment has a configuration similar to that of the image processing apparatus 20 shown in FIG. The difference is that the part performs processing related to filtering. The synthesizing unit 60 includes a filter processing unit 61. In FIG. 8, parts that perform the same processing as the image processing apparatus 20 shown in FIG. 1B are given the same reference numerals, and descriptions thereof are omitted.

FIG. 9 is a diagram illustrating processing performed by the filter processing unit 61 of the synthesis unit 60.
The filter processing unit 61 of the synthesizing unit 60 reduces the luminance of each pixel (pixel) of one line (pixel row) of image data on the display screen 13 in order to reduce flicker by image data for several lines before the scroll direction. It corrects according to the brightness of. Thereby, the luminance change between pixels in the scroll direction is alleviated, and flicker can be reduced. Of course, when such a filtering process is performed, the sharpness of the image is lowered. Therefore, the reduction of the sharpness of the image and the reduction of flicker by the filtering process are in a trade-off relationship, and the degree of the filtering process is appropriately determined. It is desirable to set. In particular, in the image processing apparatus of the embodiment, it is possible to arbitrarily set how much filter processing the operator (operator) performs according to the flicker state. This will be described later.

  In the embodiment, when the number of lines (pixel rows) of image data received at a time from the image generation device 11 is n, the luminance of each pixel is set to the luminance of image data for n−1 lines before the scroll direction. Although it corrects according to this, it is not limited to this. For example, the luminance of each pixel may be corrected according to the luminance of image data for n lines or more before the scroll direction, for example, 2n-1 lines. Thereby, the flicker can be further reduced, which is effective when the flicker is large. Further, the luminance of each pixel may be corrected according to the luminance of the image data for n-2 lines or less, for example, n / 2 lines before the scroll direction.

  The image data is written into the VRAM 28 as described with reference to FIG. 5, but the number of lines of image data stored in the VRAM 28 is increased by the number of lines of image data used for the filtering process. The filter processing unit 61 of the synthesizing unit 60 includes a register (buffer memory) that temporarily stores image data for the number n-1 of lines used for the filter processing, and scrolls the image data of each pixel of each line. Filter processing using image data for n-1 lines before.

  FIG. 10 is a diagram illustrating a filter process in the filter processing unit 61 and a configuration when the filter process is realized by an arithmetic processing device such as a DSP. FIG. 10 shows a configuration in the case of performing filter processing using image data for four lines before the line to be read.

  Of the YUV color image data read out from the VRAM 28, only the Y component representing the luminance is filtered, and the U component and the V component are maintained as they are. As shown in FIG. 10, the Y component of the read YUV color image data moves in the order of registers 91, 92, 93, 94, and 95 in synchronization with the output cycle of one line to the image display device 12. Therefore, the register 95 holds the Y component four lines before, the register 94 holds the Y component three lines before, the register 93 holds the Y component two lines before, and the register 92 holds the Y component one line before. Hold. Note that the register 91 holds the Y component of the current line, and the U component register 81 and the V component 82 hold the U component and V component of the current line. The multiplier / adder 96 multiplies the output corresponding to each pixel of the registers 91, 92, 93, 94, and 95 by a predetermined coefficient and adds the result. The multiplier / adder 96 performs such an operation for all the pixels in one line.

  The coefficients are, for example, 0.6 for the output of the register 91, 0.2 for the output of the register 92, 0.10 for the output of the register 93, and 0.05 for the outputs of the registers 94 and 95. It is. The registers 97, 83, and 84 capture the output of the multiplier / adder 96, the output of the register 81, and the output of the register 82 in synchronization with the end of the calculation of the multiplier / adder 96. The registers 97, 83, and 84 take in the calculation results for all the pixels in one line, and then output them as filtered YUV color image data for the current line. The filtered YUV color data is converted from YUV color image data to RGB color image data by a YUV-RGB conversion unit 29.

  Note that the coefficients in the filter processing are not limited to the above example, and should be set as appropriate. The number of registers 92-95 in FIG. 10 corresponds to the number of lines in the scroll direction of image data used in the filter processing. Here, the number of registers 91-95 including the register 91 that holds the image data of the current line is referred to as the number of stages of filter processing. As described above, the number of stages of filter processing is not limited to the number of lines (pixel rows) of image data received at a time from the image generation apparatus 11 and should be arbitrarily set. The number is also set arbitrarily.

  As illustrated in FIG. 8, the image processing apparatus according to the embodiment further includes a flicker adjustment input unit 70 and a filter change processing unit 71. The number of stages and the coefficients of the filter processing unit 61 in the combining unit 60 in FIG. 10 are configured to be changeable.

  The operator uses the adjustment input mechanism attached to the image processing apparatus or the image display apparatus to change the flicker reduction level so as to adjust the display sharpness and flicker to a preferable state. The flicker adjustment input unit 70 detects the level indicated by the adjustment input mechanism, and sends the detected level to the filter change processing unit 71. The filter change processing unit 71 changes the number of stages and the coefficients of the filter processing unit 61 at that time in accordance with the operator's adjustment. When the operator determines that the state is appropriate, the input by the adjustment input mechanism is not changed, and the change state of the filter processing unit 61 at that time is maintained.

  For example, the filter change processing unit 71 determines a change algorithm in advance such as changing the coefficient of the filter processing if the adjustment amount of the operator is small and changing the number of stages of the filter processing if the adjustment amount of the operator is large. Therefore, the filter configuration is changed.

FIG. 11 is a flowchart illustrating a processing operation in the image processing apparatus according to the embodiment.
In the flowchart of FIG. 11, step S31, step S32, and step S32 are added to the flowchart of FIG.
In step S31, the filter processing unit 61 performs the above-described filter processing on the image data read from the VRAM 28. For the image data that has been subjected to the filter process, the processes in and after step S25 are performed.

Steps S32 and S33 are performed when the operator performs flicker adjustment operations and changes the number of stages and coefficients of the filter processing unit 61 accordingly.
In step S32, the flicker adjustment input unit 70 detects an adjustment input by the operator.

  In step S <b> 33, the filter change processing unit 71 changes the number of stages and coefficients of the filter processing unit 61 in accordance with the adjustment input detected by the flicker adjustment input unit 70. In response to this, the filter processing unit 61 changes the number of stages and the coefficient, and the image of the sonar screen of the display device 12 changes.

  Although the embodiment has been described above, it goes without saying that various modifications are possible. As the VRAM, it is possible to use a large-capacity VRAM for storing a plurality of frames independently. In this case, the processing of writing and reading the image is different. It can be changed.

  Further, in the embodiment, it has been described that the product value m × n lines / s of the number n of lines of image data output at a time by the image generation apparatus 11 and the number m of outputs per second is equal to the scroll speed. However, the scroll speed may be faster or slower than m × n lines / s. In that case, since the image data of the number n of lines is displayed in the range of the number of lines multiplied by the ratio of the scroll speed and m × n lines / s, the range multiplied by this ratio of the number of lines n (current It is desirable to perform filtering on the line (including the readout line).

  The embodiment has been described above, but all examples and conditions described herein are described for the purpose of helping understanding of the concept of the invention applied to the invention and technology. In particular, the examples and conditions described are not intended to limit the scope of the invention, and the construction of such examples in the specification does not indicate the advantages and disadvantages of the invention. Although embodiments of the invention have been described in detail, it should be understood that various changes, substitutions and modifications can be made without departing from the spirit and scope of the invention.

DESCRIPTION OF SYMBOLS 20 Image processing apparatus 21 Generation | occurrence | production data receiving part 22 Timing extraction part 23 Timing control part 24 Write / read control part 25 Reception buffer 26 RGB-YUV conversion part 27 VRAM-IF
28 VRAM
29 YUV-RGB conversion unit 30 DVI encoder 31 DVI transceiver 60 Composition unit 61 Filter processing unit 70 Flicker adjustment input unit 71 Filter change processing unit

Claims (13)

Receive image data containing multiple input lines,
Storing the received image data including the plurality of input lines so as to form display data while shifting the line position so as to follow the image data including the plurality of input lines received last time;
The image data for one screen of the display data received and stored a plurality of times is read so as to correspond to the scroll display while sequentially shifting the row range to be read,
The image data of each row in the image data for one screen is corrected according to the immediately preceding plurality of rows of image data,
Outputting the corrected image data for one screen,
A program that causes a computer to execute processing.   The program according to claim 1, wherein the correction of the image data in each row is performed for a luminance component.   3. The correction according to claim 1, wherein the correction of the image data of each row is performed by weighting and adding the image data of the row to be corrected and the image data of a plurality of output rows immediately before in the image data for one screen. program.   The program according to claim 3, wherein the correction of the image data of each row changes the number of the plurality of output rows and the weighting in the image data correction unit in accordance with an instruction input from an operator.   The program according to any one of claims 1 to 4, wherein the number of the plurality of output lines is equal to the number of the plurality of input lines.   The number of multiple output lines is obtained by multiplying the number of multiple input lines by a ratio of the number of scroll lines per unit time and the value obtained by multiplying the number of multiple input lines by the number of times the multiple input lines are acquired per unit time. The program according to any one of claims 1 to 4, wherein the program is a predetermined value. Display memory (28);
Receiving units (21, 22) for receiving image data of a plurality of input lines;
The received display data is written to the display memory so as to form display data while shifting the row position so as to follow the previously received image data of the plurality of input lines. A display memory interface (23-27, 29) for reading from the display memory so as to correspond to scroll display while sequentially shifting a row range for reading image data for one screen of the display data written in
An output unit (30, 31) for outputting the read image data for one screen to a display device;
An image processing apparatus comprising: an image data correction unit (60, 61) that corrects the image data of each row in the image data for one screen according to the image data of a plurality of immediately preceding rows.   The image processing apparatus according to claim 7, wherein the image data correction unit corrects a luminance component.   The image processing apparatus according to claim 7 or 8, wherein the image data correction unit weights and adds the image data of a line to be corrected and the image data of a plurality of immediately preceding output lines in the image data for one screen.   The image processing apparatus according to claim 9, wherein the image data correction unit changes the number of the plurality of output rows and the weighting in the image data correction unit according to an instruction input from an operator.   The image processing apparatus according to claim 7, wherein the number of the plurality of output lines is equal to the number of the plurality of input lines.   The number of multiple output lines is obtained by multiplying the number of multiple input lines by a ratio of the number of scroll lines per unit time and the value obtained by multiplying the number of multiple input lines by the number of times the multiple input lines are acquired per unit time. The image processing apparatus according to any one of claims 7 to 10, wherein the image processing apparatus has a predetermined value. Receive image data of multiple input lines,
The received image data of the plurality of input lines is stored so as to form display data while shifting the line position so as to follow the image data of the plurality of input lines received last time,
The image data for one screen of the display data received and stored a plurality of times is read so as to correspond to the scroll display while sequentially shifting the row range to be read,
The image data of each row in the image data for one screen is corrected according to the immediately preceding plurality of rows of image data,
An image processing method comprising outputting the corrected image data for one screen.