Color matching method and image seizure device and electronic equipment using the same
A color matching and imaging technology, applied in the direction of color signal processing circuits, etc., can solve the problems of unable to converge quickly, unable to provide high-quality images, and unable to dynamically adjust the results of correction processing.
Inactive Publication Date: 2011-07-13
SONY TAIWAN
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Problems solved by technology
For example, U.S. Patent No. 7,053,935 published on May 30, 2006, has disclosed the matching result between the human visual system and a unique set of spectral response curves and only uses a preset correction matrix in the color correction process. However, due to A predetermined correction matrix is used, so the result of the correction process cannot be adjusted dynamically, so it is difficult to obtain fast and accurate color correction results, and cannot provide high-quality images
Since the prior art uses a fixed correction matrix to correct the color, the color difference is large and cannot quickly converge to the predetermined value
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[0018] Embodiments according to the present invention will be described with reference to the drawings.
[0019] figure 1 This is a flowchart illustrating the general digital image processing process.
[0020] Such as figure 1 As shown, the original image signal output obtained by the image sensor in the image capture device will undergo digital clamping processing in step 101 . In step 101, optical black is used as the black reference standard in the color sensor, and the obtained values of color channels such as red, green, blue (hereinafter referred to as RGB) are subtracted from the optical black level to make each color channel The base value does not vary greatly or cause significant errors due to the physical performance of the sensor for different colors.
[0021] Then, proceed to step 102 to perform channel shift processing. In step 102, channel offset processing is performed on the clamped color channels such as RGB, so that the values of these color channels...
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A color matching method includes: capturing of a plurality of major color signals in digital image; a conversion step, obtaining 3 is multiplied by 3 color matrix from a plurality of major color signals and converting a plurality of major color signals into a coordinate matrix with 3 is multiplied by 1 luminance, hue and saturation (LAB); and a color difference calculation step, according to a color correction type consisting of the color matrix, presetting weight matrix and correction matrix, performing iterative computation on a plurality of colors input and color difference recursively, until the color different is less than threshold value.
Description
【Technical field】 [0001] The present invention relates to a color matching method, an image capturing device using the same or an electronic device equipped with an image capturing device, especially a color matching method for processing electronic digital images, and an image capturing device using the same or an electronic device equipped with an image capturing device Electronic equipment. 【Background technique】 [0002] In recent years, electronic devices with color image capture devices such as digital cameras, electronic video cameras, and mobile phones have become popular. Generally speaking, semiconductor image sensors are installed in these electronic devices to convert captured images into electrical signals. Due to the inherent limitation of the color sensing performance of the image sensor, the color of the output image based on the image sensor usually needs to be corrected. In addition, the color of the image will also vary depending on the lighting conditio...
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IPC IPC(8): H04N9/64H04N9/69H04N9/73
Inventor 张世彦土持诚
Owner SONY TAIWAN