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MSR-based high dynamic range video generation method

A technology with high dynamic range and low dynamic range, applied in image data processing, instrumentation, computing, etc., can solve problems such as flickering of adjacent result frames, artifacts in moving areas, etc., to achieve flicker removal, time consistency, and good expansion The effect of image detail

Active Publication Date: 2020-06-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because of the image fusion based on images with different exposures, the adjacent result frames obtained may appear flickering, and artifacts may also appear in motion areas

Method used

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  • MSR-based high dynamic range video generation method
  • MSR-based high dynamic range video generation method
  • MSR-based high dynamic range video generation method

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Embodiment 1

[0064] Such as figure 1 As shown, the embodiment of the present invention provides an MSR-based high dynamic range video generation method, including the following steps S1 to S3:

[0065] S1. Using the MSR algorithm to decompose the low dynamic range video frame image;

[0066] In this embodiment, the image enhancement method based on the retinex theory of the present invention decomposes the image into a detail layer and a base layer. The basic idea of ​​the Retinex theory is that the brightness of a point perceived by humans is related to the absolute light entering the human eye from that point and the color and brightness of its surroundings. MSR (Multi-Scale Retinex) algorithm is an image enhancement algorithm based on retinex theory, which specifically decomposes a given image S(x,y) into two different images: reflection image R(x,y) ) and brightness image B(x,y), also known as detail layer and base layer.

[0067] The present invention uses the MSR algorithm to deco...

Embodiment 2

[0089] This embodiment is similar to the MSR-based high dynamic range video generation method provided in Embodiment 1, the difference is that, in order to apply the high dynamic range image generation method to high dynamic range video generation, the present invention uses scene switching detection And flicker detection and processing methods to remove flicker problems that may occur during method porting.

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Abstract

The invention discloses a MSR-based high dynamic range video generation method, and the method comprises the steps: firstly carrying out the scene switching detection of a continuous frame, and stopping the subsequent flicker detection if the scene switching happens between a current frame and a former frame; decomposing the image into a detail layer and a base layer based on an MSR algorithm, enhancing the detail layer of the bright area, globally expanding the base layer, fusing the two enhanced layers, and performing color correction according to the original image, the brightness of the original image and the brightness image obtained by fusion to generate a high dynamic range image; and finally, flicker detection is performed on the generated continuous high-dynamic-range images according to the logarithmic geometric mean difference between the brightness of the current frame and the brightness of the previous frame, and if a flicker phenomenon occurs, the brightness of the current frame is processed to obtain a flicker-removed high-dynamic-range video frame. According to the method, image details can be better expanded, so that the region with poor exposure is better expressed; and meanwhile, the time consistency of the video frames is ensured.

Description

technical field [0001] The invention belongs to the technical field of high dynamic range video generation, and in particular relates to an MSR-based high dynamic range video generation method. Background technique [0002] Because high dynamic range video can display better color details than low dynamic range video, high dynamic range display devices are gradually becoming popular in the market, and devices that can directly capture high dynamic range video are too expensive for ordinary consumers, instead of direct capture The high dynamic range video generation method suitable for ordinary shooting equipment has attracted the attention of many researchers. [0003] Existing high dynamic range video generation methods can be divided into two categories, one is single-frame-based inverse tone-mapping methods, and the other is multi-frame-based multi-frame image fusion methods. The method based on a single frame determines the parameters of the inverse tone mapping operato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/50G06T7/90
CPCG06T7/90G06T5/50G06T2207/20221G06T2207/10024G06T2207/20208G06T5/90
Inventor 霍永青余悦雪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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