Video data predistortion processing method and apparatus, and head-mounted display
A technology of video data and processing method, applied in the field of video data processing, can solve the problems of large storage space, multi-memory read and write bandwidth, affecting the speed of pre-distortion processing of video data, etc., so as to reduce storage space, improve speed, and reduce memory. The effect of read bandwidth
Active Publication Date: 2015-09-02
BEIJING PICO TECH
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[0003] The present invention provides a video data pre-distortion processing method, device and head-mounted display to solve the problem that in the prior art, the Map table requires a large storage space, occupies more memory read and write bandwidth, and affects the speed of video data pre-distortion processing The problem
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[0034] The core idea of the present invention is to provide a relative data storage method for the problem of large amount of data stored in the Map table during pre-distortion processing of video data in the prior art, occupying more memory bandwidth, and reducing the speed of pre-distortion processing. The table is compressed, so that the pixels after video distortion processing can be expressed by the input coordinates of the positioning pixel coordinates, the output coordinates, and the relative input coordinates of other pixels in the same line and the positioning pixel points, saving the storage of the Map table Space reduces the amount of data stored in the Map table, and when the compressed Map table of the present invention is used for pre-distortion processing, the speed and efficiency of pre-distortion processing are greatly improved.
[0035] figure 1 It is a schematic flow chart of a video data pre-distortion processing method according to an embodiment of the p...
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The invention discloses a video data predistortion processing method and apparatus, and a head-mounted display. The processing method includes the steps: reading an original Map table for video data predistortion processing, the original Map table storing the input coordinate and the output coordinate of each pixel point in a video frame; determining positioning pixel points of each row of the video frame after the predistortion processing, and determining a relative position relation between the positioning pixel points and other pixel points in the same row; obtaining a compressed Map table on the basis of the number of the pixel points of each row of the video frame, the input coordinates and the output coordinates of the positioning pixel points as well as relative input coordinates of the pixel points in each row and the positioning pixel points in the same row after the predistortion processing; and performing the predistortion processing on the received video data through the compressed Map table. The video data predistortion processing method reduces the data bulk and the needed storage space during video data predistortion processing, and reduces the memory read bandwidth.
Description
technical field [0001] The present invention relates to the technical field of video data processing, in particular to a video data pre-distortion processing method, device and head-mounted display. Background technique [0002] When the video data is output and displayed, sometimes data deformation or distortion occurs. The distortion seriously affects the experience of the video viewer and reduces the user experience. Therefore, it is necessary to pre-distort the original video data. A pre-distortion processing method is to use a Map table (ie, a Map lookup table) to pre-distort the video data. However, when the existing Map table stores the pixels of each frame of video data, the distortion of all pixels before and after The coordinates are stored, that is to say, each Map data contains pixel output coordinates and input coordinates, each pixel needs 8Byte to store, and video data usually contains a large number of pixels, each pixel occupies 8Byte, then The storage spac...
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IPC IPC(8): H04N5/14H04N5/208
Inventor范传国马金波赵文慧王冲
OwnerBEIJING PICO TECH