Image acquisition device and image compensation method thereof

Abstract

The invention provides an image obtaining device and an image compensation method thereof. The image compensation method is suitable for the image obtaining device and comprises the following steps: obtaining an image under a current light source; detecting the current light source to perform white balance treatment so as to obtain current gain information relative to the current light source; and determining a correction parameter according to the current gain information and multiple reference gain information. The reference gain information respectively corresponds to pre-set multiple mutually different colour temperatures; a first dark angle compensation table is corrected by utilizing the correction parameter, such that a second dark angle compensation table is obtained; and the image is compensated by utilizing the second dark angle compensation table, such that a compensated image is generated.

Description

technical field [0001] The present invention relates to an image processing method, and in particular to an image acquisition device and an image compensation method thereof. Background technique [0002] In a general image acquisition device, it uses a photosensitive element such as a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS) to capture images entering the fuselage through the lens. light inside. When the light passes through the lens group, refraction occurs to present the image on the CCD or CMOS. However, due to the attenuation of energy due to the refraction of light, the refraction angle of the light passing through the edge of the lens will be larger than that of the light passing through the center of the lens, thus causing the edge of the captured image to be darker, but The center is brighter, and this effect is called the color shading effect of the image. Among them, for hand-held m...

AI Technical Summary

Problems solved by technology

[0004] However, in the usage scenario where the user takes an image through the image acquisition device, the user may perform the shooting action under various light source environments

If only the compensation parameter table constructed for a single light source is used to compensate the vignetting of the image, the compensated image may not be as expected.

For example, the compensated image may have partial color cast, or the compensated image may have color inconsistency

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