Color correction matrix adjusting method and device and storage medium

A color correction and correction matrix technology, which is applied in the field of image processing, can solve the problems of inability to correct the effect and the inaccurate correction of the color correction matrix

Pending Publication Date: 2020-10-30
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

[0005] Embodiments of the present invention provide a method, device, and storage medium for adjusting a color correction matrix, so as to at least solve the problem in the related art that the color correction matrix cannot be corrected accurately or can not produce a predetermined effect

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  • Color correction matrix adjusting method and device and storage medium
  • Color correction matrix adjusting method and device and storage medium

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Embodiment Construction

[0025] In order to obtain a more accurate and more compliant color correction matrix, it is possible to collect the color of the standard color card in the standard light source, increase the dimension of the color correction matrix, and finally use the least square method to obtain a CCM matrix with less error. In addition, you can also Interpolation is performed on the pre-corrected CCM matrix and the unit matrix to adjust the saturation.

[0026] However, if only the accurate CCM correction of the standard color card (for example, 24 color cards) under the standard light source, due to the dimensional limitations of the 3x3 linear transformation, increasing the dimension in the calculation process will only have a limited improvement in the final accuracy, and accurate color correction will not Not necessarily the color correction effect that users really want. If the color correction is adjusted according to the user's requirements, and the CCM and the unit matrix are dire...

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Abstract

The embodiment of the invention provides a color correction matrix adjusting method and device and a storage medium. The method comprises the steps of obtaining an initial color correction matrix based on an RGB color space based on a standard color card; mapping the initial color correction matrix based on the RGB color space into a transformation matrix based on a YUV color space; carrying out coordinate transformation on the transformation matrix in the YUV color space, wherein the coordinate transformation comprises at least one of coordinate transformation used for adjusting image saturation and coordinate transformation used for carrying out image chromaticity rotation; and mapping the transformation matrix based on the YUV color space after coordinate transformation into a final color correction matrix based on the RGB color space. Through the method and the device, the problem that the color correction matrix cannot be accurately corrected or cannot be corrected to obtain a preset effect is solved, and an accurate and predictable correction effect is ensured.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image processing, and in particular, relate to a method and device for adjusting a color correction matrix, and a storage medium. Background technique [0002] The scene color captured by the camera is closely related to the spectral response of the sensor. The colors captured by different image sensors in the same shooting scene will be different and different from the human eye. Therefore, color correction is required to restore true colors. [0003] At present, the traditional color correction method is to use the color correction matrix ccm (color correction matrix) for calibration, that is, use a 3x3 matrix to multiply the red, green, blue rgb (red, green, blue) channel of each pixel for color correction . Essentially, it is a linear transformation of each response curve of the sensor. [0004] Since the difference between different response curves is non-linear, the color c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/90
CPCG06T5/007G06T7/90
Inventor 曹阳
Owner ZHEJIANG DAHUA TECH CO LTD
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