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Color correction method and image processing device

An image processing device and color correction technology, which is applied in the field of color correction, can solve problems such as corrected color errors, and achieve the effect of reducing errors and reducing memory space

Active Publication Date: 2013-10-23
ALTEK SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this interpolation method will introduce errors in corrected colors

Method used

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  • Color correction method and image processing device
  • Color correction method and image processing device
  • Color correction method and image processing device

Examples

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no. 1 example

[0042] figure 1 is a functional schematic diagram of an image processing device according to an embodiment.

[0043] Please refer to figure 1 , this embodiment proposes an image processing device 100 for generating a corrected image 140 according to an original image 120 . The original image 120 is an image captured by an image capture device, and the colors therein do not conform to the colors sensed by human eyes. For example, the original image 120 may have too much red component, or too much green component. The color of the corrected image 140 is more in line with the color sensed by human eyes, or a more saturated color to meet people's preferences. The image processing device 100 utilizes a correction function and a lookup table (lookup table) to generate the calibrated image 140, and can reduce the memory space for storing the lookup table. In this embodiment, the image processing device 100 is a digital video camera. However, the image processing device 100 can a...

no. 2 example

[0060] This embodiment provides an image processing device whose structure is the same as that of the image processing device 100 in the first embodiment. The difference of this embodiment is that the process of generating the corrected image 140 according to the original image 120 is different from that of the first embodiment.

[0061] Figure 6 is a schematic diagram of the operation flow of the image processing unit according to the second embodiment.

[0062] Please also refer to figure 2 and Figure 6 , the image processing unit 240 first converts the color value 302 into a function color value 306 according to the correction function 304 . The function color value 306 is then converted into a look-up table color value 602 according to the look-up table 600 . The operation of the correction function 304 has been described in detail in the first embodiment, and will not be repeated here. In particular, in this embodiment, the function color value 306 is used as the ...

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Abstract

The invention provides a color correction method and an image processing device which are used for generating a corrected image according to an original image. The original image includes a plurality of pixels and each pixel includes at least one color value. The method comprises the steps of converting the color values into a plurality of function color values according to a correction function and converting the color values into a plurality of lookup table color values according to a lookup table. The method further comprises the steps of synthesizing the function color values and the lookup table color values into a plurality of correction color values and generating the corrected image according to the correction color values. Therefore, a memory space required for storing the lookup table can be reduced.

Description

technical field [0001] The present invention relates to a color correction technology, and in particular to a color correction method and an image processing device using a lookup table and a correction function. Background technique [0002] With the advancement of technology in making photosensitive elements and lenses, many devices on the market can capture images or video. For example, laptops, cell phones, and tablets are often equipped with devices capable of capturing images in addition to cameras. How to correctly present the color of the acquired image on these devices is very important. However, since the camera's sensitivity to different wavelengths of light is different from that of the human eye, it is necessary to rely on image processing methods to correct the color of the captured image to make up for the lack of photosensitive elements. Generally, techniques for color correction include using a lookup table to convert the color to a color that is correctly...

Claims

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Application Information

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IPC IPC(8): H04N1/60H04N9/64
Inventor 赵善隆周宏隆
Owner ALTEK SEMICON
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