Method and device for obtaining high dynamic range image exposure compensation value

A high dynamic range and exposure compensation technology, applied in the field of exposure processing, can solve the problems of over-exposure, under-exposure, poor picture quality and effect, etc., to improve image quality, enhance user experience, and dynamically optimize exposure compensation Effect

Active Publication Date: 2020-02-14
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the large difference in the actual shooting environment, when shooting high dynamic range images through the above methods, it will more or less lead to overexposure or underexposure of the captured image, which makes the quality and effect of the final shot image inferior. Difference

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  • Method and device for obtaining high dynamic range image exposure compensation value
  • Method and device for obtaining high dynamic range image exposure compensation value
  • Method and device for obtaining high dynamic range image exposure compensation value

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Embodiment Construction

[0025] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

[0026] In order to solve the problem in related technologies that when using various smart terminal cameras to capture high dynamic range images, the captured images may be over-exposed or under-exposed, resulting in poor quality and effect of the final captured image, a solution is proposed. A method for obtaining exposure compensation value for high dynamic range images.

[0027] The high dynamic range image exposure compensation value acquisition method provided by this application determines the histogram of each color c...

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Abstract

The present application discloses a method and device for acquiring high dynamic range image exposure compensation values, wherein the method includes: determining the histogram of each color channel corresponding to the current scene, wherein the histogram of each color channel includes different brightness and pixel values ​​under each color channel The corresponding relationship of proportion; according to the preset normal exposure brightness threshold, pixel ratio threshold, and the corresponding relationship between different brightness and pixel ratio under each color channel, determine the degree of underexposure and overexposure of the current scene; according to the underexposure of the current scene Exposure degree and overexposure degree, determine the underexposure compensation value and overexposure compensation value of the current scene. The method of the present application can adaptively determine the exposure compensation amount of the captured image according to different shooting scenes, so as to realize the dynamic optimal exposure compensation for the captured image, thereby improving the quality of the captured image and improving user experience.

Description

technical field [0001] The present application relates to the technical field of exposure processing, and in particular to a method and device for acquiring exposure compensation values ​​for high dynamic range images. Background technique [0002] Nowadays, all kinds of smart terminals have become a must-have in the daily life of users, and users can operate various functions through terminal devices. For example, a camera in the terminal device is used to capture a high dynamic range image (High-Dynamic Range, HDR for short). Among them, HDR is obtained by fusing three images of a normal exposure image, an underexposed image and an overexposed image. [0003] In the actual application process, when the user uses the camera to shoot high dynamic range images, the terminal device usually first uses the automatic exposure control system (Auto Exposure Control, referred to as: AEC) to take a normal exposure image of the shooting area, and then respectively according to the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235
CPCH04N9/68G06T5/50G06T5/40G06T5/007G06T2207/20208H04N23/741H04N23/743H04N23/10G06T5/009G06T2207/20221H04N9/77H04N23/71
Inventor 刘凯
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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