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Method for displaying and reproducing high dynamic range images

A high dynamic range, image technology, applied in static indicators, cathode ray tube indicators, color signal processing circuits, etc.

Inactive Publication Date: 2012-08-08
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the existing color appearance model has not been perfected to the point where it can handle the color of high dynamic range images, it needs to be further improved.

Method used

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  • Method for displaying and reproducing high dynamic range images
  • Method for displaying and reproducing high dynamic range images
  • Method for displaying and reproducing high dynamic range images

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Embodiment Construction

[0064] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0065] see figure 1 , the embodiment mainly includes the following steps:

[0066] Step 1, first convert the RGB value of each pixel (x, y) of the high dynamic range image to the XYZ space to obtain the corresponding XYZ value; then use the M matrix to convert to the response space of the cone cells, and the conversion is as follows:

[0067] R ( x , y ) G ( x , y ) B ( x ...

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Abstract

The invention relates to a method for displaying and reproducing high dynamic range images. The dynamic range of the images is compressed through a principle of keeping relative visual perception of light sensing cells of human eyes under adaptive brightness, so the aim of copying scenes in the high dynamic range images to display equipment and paper of a low dynamic range, wherein a border phaseresistance mechanism related to visual space and contrast is used to calculate the relatively perceptive adaptive brightness. By detecting the difference from the conventional high dynamic range images, compared with some conventional methods, the method has relatively good effect and meets the requirements for output and display of the high dynamic range images.

Description

technical field [0001] The invention belongs to the technical field of reproduction in digital image processing, in particular to a method for displaying and reproducing a high dynamic range image on a low dynamic range display device (such as a monitor and paper). Background technique [0002] The commonly used images with 8 bits per channel are called low dynamic range images. This type of image cannot record the real brightness in the scene, but only records the visually coded, limited tonal relationship (usually only 256 tones per channel), and the final effect of the recorded scene must be determined according to the specific display device . If the maximum display brightness of a display is 100cd / m 2 , the dynamic range is 100:1, then only 1cd / m in the scene can be displayed correctly 2 to 100cd / m 2 The light and shadow effect between the brightness cannot present the complete light and shadow effect of the original scene. Therefore, it is also known as a device-d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G5/02H04N9/64
Inventor 万晓霞谢德红
Owner WUHAN UNIV
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