A video image processing method for LCD screen anti-image retention and display depth reduction
A technology of video image and processing method, which is applied in the field of video processing, and can solve problems such as large processing delay, unsuitable high real-time application occasions, and large hardware storage resource overhead.
Active Publication Date: 2021-09-10
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology
The disadvantage of the method in this patent is that the processing delay is large, and the image quality parameters of the three images need to be obtained. Secondly, the three images need to be fused, and the fused image should be oversampled again.
The biggest disadvantage is that the overhead of hardware storage resources is relatively large, and it is not suitable for high real-time applications
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[0037] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0038] In this embodiment, a monochrome video signal with a resolution of 1280x1024, a field frequency of 60 Hz, and a bit width of 10 bits is used as an input signal, and an output signal is a monochrome video signal of 1280x1024, a field frequency of 60 Hz, and a bit width of 8 bits.
[0039] Specific steps are as follows:
[0040] Step 1: Acquire the collected video image, and determine the sampling bit width of the video image 10; determine the display bit width of the image display 8, the difference between the two is the bit width to be truncated 2; define a weight matrix according to the bit width to be truncated , the weight matrix adopts a 2x2 matrix, such as figure 1 (a) shown. The element value in the weight matrix is not greater than 2 n A non...
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The present invention proposes a video image processing method for preventing afterimages on a liquid crystal screen and reducing display depth. According to the required truncated bit width, a weight matrix is defined in the method, and the weight matrix and the image are calculated as a dot product; several weight coefficient templates are defined; When processing pixel data, the input data is divided into two parts, one part is the reserved bit, and the other is the truncated bit, first judge whether the reserved bit is all "1", if it is all "1", then output the data; if not If it is all "1", after selecting the corresponding template, compare the truncated bit with the template weight, if the truncated bit is greater than the weight, add the truncated bit to the reserved bit and output, if the truncated bit is less than or equal to the weight, then output the reserved bit. The image processing based on this method not only has low hardware design complexity and low implementation cost, but also realizes the low bit width conversion of high dynamic range images in real time, objectively increases the polarity reversal of liquid crystals, prolongs the life of liquid crystals and reduces "afterimages" the emergence of the phenomenon.
Description
technical field [0001] The invention belongs to the field of video processing, and in particular relates to a video image processing method for preventing image sticking and reducing display depth of a liquid crystal screen. Background technique [0002] In some aerospace video image shooting, recording, and projection applications, high-sampling bit-width image sensors or video images with large color depths, such as 12-bit wide sensors or 10-bit per-color video images, are widely used. However, the display bit width of a general-purpose display is only 8 bits, and even some high-brightness displays have a display bit width of only 6 bits. Therefore, in order to adapt to the display bit width of the display, the lower bits in the original data are often truncated, and the high-frequency detail information is lost. [0003] Display settings are widely used in production, scientific research and daily life, and liquid crystal display (LCD) technology is widely used in displa...
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IPC IPC(8): H04N5/14
CPCH04N5/14
Inventor 郑永瑞
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC