Image exposure compensation method and device, and computer-readable storage medium

An exposure compensation and image technology, applied in the field of photography, can solve the problem of image overexposure or underexposure, and achieve the effect of improving image quality, reducing the possibility of overexposure and underexposure, and improving the shooting experience.

Active Publication Date: 2017-09-15
NUBIA TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide an image exposure compensation method, device and computer-readable storage mediu...

Method used

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  • Image exposure compensation method and device, and computer-readable storage medium
  • Image exposure compensation method and device, and computer-readable storage medium
  • Image exposure compensation method and device, and computer-readable storage medium

Examples

Experimental program
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Embodiment 1

[0069]The traditional exposure technology is to enhance the brightness and contrast of the global image without considering the pixel distribution characteristics in the image. For example, the edge of the image is rich in high-frequency detail components, which requires a high exposure intensity, while the part with large color blocks in the image is low-frequency redundancy. The composition requires a small exposure intensity, and the global compensation method can easily cause local overexposure or underexposure in the image, resulting in an overall decrease in image quality. To solve this problem, such as figure 2 As shown, this embodiment shows an image exposure compensation method, which can divide the shooting preview image into a plurality of exposure compensation sub-areas according to the pixel distribution characteristics of the shooting preview image during the image shooting process, and adjust the exposure compensation sub-areas for different exposure compensatio...

Embodiment 2

[0131] see Figure 6 , the present embodiment proposes an image exposure compensation device, the image exposure compensation device includes a processor 61, a memory 62 and a communication bus 63; the communication bus 63 is used to realize connection and communication between the processor and the memory; the processor 61 is used for Execute the image exposure compensation program stored in the memory 62 to achieve the following steps: during the image capture process, according to the pixel distribution characteristics of the shooting preview image, the shooting preview image is divided into a plurality of exposure compensation sub-areas; according to each exposure compensation sub-area According to the pixel distribution characteristics of each exposure compensation sub-area, the exposure compensation parameters corresponding to each exposure compensation sub-area are obtained; according to the exposure compensation parameters corresponding to each exposure compensation sub...

Embodiment 3

[0150] This embodiment proposes a computer-readable storage medium, the computer-readable storage medium stores one or more programs, and one or more programs can be executed to implement the following steps:

[0151] During the image shooting process, according to the pixel distribution characteristics of the shooting preview image, the shooting preview image is divided into a plurality of exposure compensation sub-regions; according to the pixel distribution characteristics of each exposure compensation sub-region, the exposure compensation corresponding to each exposure compensation sub-region is obtained Parameters; according to the exposure compensation parameters corresponding to each exposure compensation sub-area, perform exposure compensation on the exposure compensation parameters respectively.

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Abstract

The invention discloses an image exposure compensation method and device, and a computer-readable storage medium. The image exposure compensation method may comprise the following steps: in an image shooting process, according to pixel distribution characteristics of a shot preview image, dividing the shot preview image into a plurality of exposure compensation subareas; according to pixel distribution characteristics of each of the exposure compensation subareas, obtaining exposure compensation parameters corresponding to the each of the exposure compensation subareas; and according to the exposure compensation parameters corresponding to the exposure compensation subareas, respectively performing exposure compensation on the exposure compensation parameters. Compared with the image local exposure compensation in the prior art, according to the image exposure compensation method and device, and the computer-readable storage medium, the division of the exposure compensation subareas is performed on the image according to the pixel distribution characteristics of the image, and the each of the subareas is provided with the corresponding exposure compensation parameters, so the each of the exposure compensation subareas may obtain appropriate exposure compensation at different degrees; the possibilities for occurrence of overexposure and underexposure are effectively reduced, the outline and the stereoscopic impression of the image are reinforced, the imaging quality of the image is improved, and the shooting experience of a user is improved.

Description

technical field [0001] The present invention relates to the technical field of photographing, in particular to an image exposure compensation method, device and computer-readable storage medium. Background technique [0002] Exposure compensation, also known as EV (exposure value) adjustment, refers to an image enhancement technology adopted for insufficient lighting of the shooting environment during image shooting. Traditional exposure compensation is to enhance the brightness and contrast of the global image, that is, for an image, exposure compensation refers to exposing all objects in the image (including the shooting background) with the same exposure intensity. [0003] Traditional exposure compensation does not take into account the needs of different areas of the image for different exposure intensities. Using traditional exposure compensation can easily cause partial overexposure or underexposure of the image, resulting in an overall decline in image quality. Ther...

Claims

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Application Information

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IPC IPC(8): H04N5/235
CPCH04N23/70
Inventor 王君地
Owner NUBIA TECHNOLOGY CO LTD
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