Method for lowering light leakage phenomenon of dynamic images

Abstract

The invention discloses a method for lowering the light leakage phenomenon of dynamic images, which is suitable for image sensors. The image sensor converts a shot image picture into image data which is divided into an effective zone, an upper matte black zone and a lower matte black zone. The method comprises: capturing the data of two continuous images as a first frame image and a second frame image; calculating the luminance difference value of pixels respectively on the corresponding pixel positions in the lower matte black zone of the first frame image and the upper matte black zone of the second frame image; comparing the luminance difference value with a threshold value; when the upper matte black zone of the second frame image needs to carry out luminance compensation, finding theposition to be compensated in the upper matte black zone of the second frame image; and compensating the luminance value of the pixel in the effective zone of the second frame image on the corresponding compensation position.

Description

technical field [0001] The present invention relates to a method for reducing the light leakage phenomenon of images, especially a method for reducing the light leakage phenomenon of dynamic images. Background technique [0002] Image sensors used in digital cameras mostly use Charge-coupled Devices (CCDs). When this type of image sensor senses a picture with a high-brightness object, a light leakage phenomenon (Smear Effect) will occur near the corresponding strong-light object. Please refer to figure 1 As shown, it is a schematic diagram of image data with light leakage phenomenon presented by the image sensor when receiving a frame with a high-brightness object. It can be seen from the figure that the image sensor 10 includes a plurality of sensing pixels 12 arranged in a matrix. When the sensing pixels 12 sense a picture with a high-brightness object, object oversaturated pixels 14 and striped oversaturated pixels 16 appear on the sensing pixels corresponding to the h...

AI Technical Summary

Problems solved by technology

[0005] The above two methods to eliminate light leakage are to eliminate light leakage for a single image, but there is no treatment for eliminating light leakage for continuous moving images

If the past method of eliminating light leakage is directly applied to continuous motion images, the motion images will produce unnatural side effects, which will make the picture too artificial (artifact)

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