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Drawing of real time high dynamic range image and display process

A high dynamic range, real-time rendering technology, applied in 3D image processing, image data processing, instruments, etc., can solve the problems of increased calculation and inability to guarantee real-time performance, and achieve improved efficiency, good portability, and simple principle Effect

Inactive Publication Date: 2007-12-05
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

The quality of the image using this method is heavily dependent on the number of sampling points, but too many sampling points will greatly increase the amount of calculation and cannot guarantee real-time performance

Method used

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  • Drawing of real time high dynamic range image and display process
  • Drawing of real time high dynamic range image and display process
  • Drawing of real time high dynamic range image and display process

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Embodiment Construction

[0049] The principle of the method of real-time drawing and displaying the high dynamic range image is: during the drawing process of the image, the high dynamic range information is retained to generate the high dynamic range image. The glow effect is achieved by Gaussian blurring the high dynamic range image, and finally the high dynamic range image is mapped to the low dynamic range by tone mapping and mixed with the glow effect image to generate the final image. This method first uses high-precision floating-point numbers to store the high dynamic range information of the image when drawing the image, and stores the high dynamic range image in the frame buffer in RGBE8 format, and decodes it first when taking the image data out of the frame buffer. Then, pixels whose brightness is greater than a certain threshold are filtered out from the original image for Gaussian blurring to generate an image with a glow effect. The high dynamic range image is then tone mapped to the lo...

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Abstract

The invention discloses a real-time drafting and displaying method of highly dynamic scope image, which comprises the following steps: 1) remaining highly dynamic scope information when drafting scene; 2) calculating the average brightness of image; filtering the brightness of image according to the threshold; generating new image with high-brightness filtered area; proceeding two-dimensional Gauss fuzzy for new image; generating glow effect; 3) mapping color tone of image with highly dynamic scope information; displaying the image with highly dynamic scope information to display in the low dynamic scope; keeping details as many as possible; 4) generating final image after do alpha mixing the color tone mapped image and fuzzy image. The invention reduces the calculation quantity, which satisfies the drafting need with good practical value.

Description

technical field [0001] The invention relates to a method for drawing and displaying real-time high dynamic range images. Background technique [0002] The ratio between the maximum and minimum brightness levels of an image is called the dynamic range. Through the automatic adjustment of the pupil of the eye, the dynamic range of the brightness that the human eye can perceive is 1000000000:1. Even in computer-generated images, the dynamic range of images generated by the global illumination algorithm can reach up to 30000:1. In the traditional method, the color of each pixel is stored by 24 binary bits, in which each channel of red, green, and blue occupies 8 bits, and sometimes an 8-bit alpha channel is added, for a total of 32 bits. The final rendered color is between 0.0-1.0, and the bright contrast ratio that can be displayed is 256:1. So it is difficult for traditional methods to represent real scenes with high contrast and high dynamic range. In recent years, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/50
Inventor 潘志庚杨皓然何高奇
Owner ZHEJIANG UNIV
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