Method used for generating high dynamic range image with single low dynamic range image

A technology of low dynamic range and high dynamic range, applied in the field of image processing

Active Publication Date: 2017-08-15
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of generating high dynamic range images from low dynamic range images, and provide a

Method used

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  • Method used for generating high dynamic range image with single low dynamic range image
  • Method used for generating high dynamic range image with single low dynamic range image
  • Method used for generating high dynamic range image with single low dynamic range image

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Embodiment Construction

[0030] In order to better understand the present invention, the method for generating a high dynamic range image from a single low dynamic range image based on layering of detail layers in the present invention will be described in more detail below in conjunction with specific embodiments. In the following description, detailed descriptions of currently existing prior art may obscure the subject matter of the present invention, and these descriptions will be omitted here.

[0031] figure 1 It is a flow chart of a specific embodiment of the method for generating a single high dynamic range image of the present invention. In this embodiment, proceed according to the following steps:

[0032] Step 1, acquire a low dynamic range image 101, such as Figure 4 ;

[0033] Step 2, performing color space transformation 102 on the low dynamic range image;

[0034] The conversion formula used is as follows:

[0035]

[0036] in, R , G , B are the pixel values ​​of the three com...

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Abstract

The invention proposes a method used for generating a high dynamic range image with a single low dynamic range image. The method comprises the steps that based on the human visual characteristics, the luminance component and the chrominance component of the low dynamic range image are separated; gamma correcting and edge-preserving filtering are carried out on the luminance component; the basic layer of the luminance component is extracted; traverse operating is carried out on the basic layer and the luminance component to acquire the detail layer of the luminance component; an anti-tone mapping function is constructed; anti-tone mapping operation is carried out on the detail layer and the gamma-corrected luminance image to acquire the respective anti-color collimated image; the luminance component after anti-tone mapping and the detail layer are merged to acquire a new luminance component; the chrominance component and the new luminance component are merged; and contrast stretching and denoising are carried out on the merged image to acquire the final high dynamic range image. According to the invention, the high dynamic range image is acquired through the single low dynamic range image, and the method has the advantages of good processing effect, high operability and wide applicability.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method for generating a high dynamic image of a single image by layered extraction and re-merging based on detailed information of a single low dynamic range image. [0002] technical background [0003] Over the past two decades, high dynamic range (HDR) image capture, introduced by the field of computer graphics, has revolutionized this and other fields such as photography, virtual reality, visual imaging, video games etc. HDR imaging can directly capture and utilize the actual physical value of brightness. During the imaging process of the image, very dark and very bright areas may be recorded in the same frame of image or the same video at the same time. Using the actual physical value of brightness to represent the image can avoid the appearance of underexposed and overexposed areas in the image. Traditional image acquisition methods do not use the actual physical value of b...

Claims

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Application Information

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IPC IPC(8): G06T5/50G06T5/00
CPCG06T5/002G06T5/50G06T2207/10024G06T2207/20028G06T2207/20221
Inventor 张红英朱恩弘吴亚东
Owner SOUTHWEAT UNIV OF SCI & TECH
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