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A New High Dynamic Range Image Generation Method

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

Active Publication Date: 2022-03-11
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 new method for directly generating high dynamic range images from a single low dynamic range image, through which a high dynamic range image can be obtained

Method used

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  • A New High Dynamic Range Image Generation Method
  • A New High Dynamic Range Image Generation Method
  • A New High Dynamic Range Image Generation Method

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Embodiment Construction

[0025] 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 layer-of-detail layering 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 ignored here.

[0026] 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:

[0027] Step 1, acquire a low dynamic range image, such as figure 2 ;

[0028] Step 2, performing color space transformation on the low dynamic range image;

[0029] The conversion formula used is as follows:

[0030]

[0031] in, R , G , B are the pixel values ​​of the three components i...

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Abstract

The invention proposes a high dynamic range image generation method based on inverse tone mapping and saturation adjustment. This method is based on the visual characteristics of human eyes. Firstly, the original low dynamic range image is converted from RGB color space to HSV color space, and the brightness component and saturation component of the low dynamic range image are separated; secondly, the brightness component is extended by inverse tone mapping, Separate the high-light area, perform gamma correction on the high-light area, and fuse the low-light area to obtain a new brightness component; then, perform a linear increase on the saturation component, and calculate the correlation coefficient between the brightness component and the saturation pair component of the original image at the same time, Adjust the boosted saturation component according to the new brightness component and correlation coefficient to obtain a new saturation component; finally combine the new brightness component, new saturation component and hue component to obtain a high dynamic range image in HSV space, Then convert the image to RGB color space to get the final high dynamic range image.

Description

technical field [0001] The invention relates to image processing technology, in particular to a high dynamic range image generation method based on inverse tone mapping and saturation adjustment. Background technique [0002] In the field of digital images, dynamic range refers to the ratio of the maximum brightness value to the minimum brightness value in an image scene. The larger the dynamic range of the image, the wider the range of light intensity detected when the image is taken, and the richer the detailed information presented in the image. However, due to the limitations of current imaging equipment, it is often only possible to capture a limited dynamic range, resulting in a large lack of detail in the obtained image, which cannot be compared with the real scene perceived by the human eye. Compared with ordinary images, high dynamic range images (high dynamic range, HDR) can provide larger dynamic range and richer detail information, which is more consistent with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/90
CPCG06T7/90G06T5/90
Inventor 张红英张媛媛吴亚东
Owner SOUTHWEAT UNIV OF SCI & TECH
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