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Wide dynamic processing method for single-frame double-exposure image

A wide dynamic processing and double exposure technology, applied in the field of image processing, can solve the problems of unsatisfactory wide dynamic effect and slow multi-frame exposure processing speed, and achieve the effect of improving wide dynamic image quality, improving operation speed and high quality

Active Publication Date: 2011-05-25
QINGDAO HISENSE TRANS TECH
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Problems solved by technology

[0005] In order to solve the problems of unsatisfactory wide dynamic effect and slow multi-frame exposure processing speed in the existing single-frame single-exposure image wide dynamic processing technology, the present invention provides a single-frame multi-exposure image wide dynamic processing method with proper exposure and high processing speed. quick

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  • Wide dynamic processing method for single-frame double-exposure image

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Embodiment 1

[0044] Embodiment one, see figure 1 Shown is the flow chart of this embodiment.

[0045] The wide dynamic processing method of the single-frame double-exposure image of this embodiment includes:

[0046] Step S01, interpolation calculation, complementing the values ​​of the three channels of RGB for each pixel.

[0047] Specifically, such as figure 2 As shown, it is a schematic diagram of a single-frame double-exposure original image, in which the white part is a long-exposure pixel block, and the black part is a short-exposure pixel block. The original image is 12 bits, and the data format is bayer. The long-exposure pixel block and short-exposure pixel block The pixel blocks are staggered sequentially in the image, the long exposure pixel block includes n×n long exposure pixels, and the short exposure pixel block includes n×n short exposure pixels, and n is a positive integer. In this embodiment, preferably Using the original image of n=2, each square in the figure repre...

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Abstract

The invention discloses a wide dynamic processing method for a single-frame double-exposure image. The single-frame double-exposure image is a 12-bit original image comprising long exposure pixel blocks and short exposure pixel blocks simultaneously, and the method comprises the following steps of: (1) performing interpolation calculation, namely completing values of three channels of red, green and blue (RGB) for each pixel; (2) performing wide dynamic mapping, namely mapping and compressing the interpolated image; (3) segmenting image subjected to wide dynamic mapping to obtain two images only with the long exposure pixels and the short exposure pixels respectively; and (4) combining the two images by using a brightness distribution histogram interval segmenting method. Through the wide dynamic processing method for the single-frame double-exposure image, the pixels in two exposure modes in the single-frame image are combined, so that each part is subjected to proper exposure. Moreover, the single-frame image is only needed to be processed, the calculated quantity is reduced, and the wide dynamic image quality is improved through detection and correction of dead pixels and correction of the image.

Description

technical field [0001] The invention belongs to the field of image processing, and in particular relates to a wide dynamic processing method for single-frame double-exposure images. Background technique [0002] Image wide dynamic processing technology can realize high-fidelity scenes at the upper limit of display media with low cost and low dynamic range, and has great value in high-definition image processing. The existing image wide dynamic processing algorithm is mainly based on the multi-frame multi-exposure mode, that is, the same scene is shot multiple times, and each shot adopts a different exposure mode, and transitions from short exposure to long exposure to obtain multi-frame images, and finally uses A related technology synthesizes a frame of wide dynamic images. The bright and dark parts of the image obtained by this processing method can be properly exposed to fully reflect the details, but this method requires multiple shots of the same scene, which increases...

Claims

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Application Information

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IPC IPC(8): H04N5/235
Inventor 何冬晓陈维强刘微邵明欣隋守鑫
Owner QINGDAO HISENSE TRANS TECH
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