System and method for realizing image high dynamic range compression

A high dynamic range, image technology, applied in the field of digital image/video compression processing, digital image/video processing, can solve problems such as image ratio loss in damaged normal exposure areas

Active Publication Date: 2012-06-13
SHANGHAI FULLHAN MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art, to provide a method that can effectively solve the problems of damage to the normal exposure area, halo (Halo) on the border and excessive

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  • System and method for realizing image high dynamic range compression
  • System and method for realizing image high dynamic range compression
  • System and method for realizing image high dynamic range compression

Examples

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Embodiment Construction

[0080] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0081] see figure 1 and figure 2 As shown, the system for realizing image high dynamic range compression includes:

[0082] (1) The original image input unit 300, used to acquire the image to be processed;

[0083] (2) The exposure area calculation unit 301 is connected with the original image input unit 300, and is used to calculate and divide the exposure area of ​​the image to be processed; the exposure area is obtained by analyzing the pixel value of the image to be processed, and according to The difference in exposure degree divides the image to be processed; the exposure area may include an overexposed area, an underexposed area, a normal exposed area, and an intermediate area;

[0084] (3) The comparison unit 302 is connected to the original image input unit 300 and the exposure area calculation unit 301 respectively, and is used ...

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Abstract

The invention relates to a system for realizing image high dynamic range compression. The system comprises a primary image input unit, an exposure area calculation unit, a comparison unit, a correction unit, and a compressed image output unit. The invention also relates to a method for realizing the image high dynamic range compression. By adopting the system and the method for realizing the image high dynamic range compression, the problems of damage to a normal exposure area, Halo existing at the edge and over loss of image contrast in the method are effectively solved; the contrast of the normal exposure area is reserved, at the same time, the visibility of the under exposure area and the exposure area is improved; the system and method not only are directly applied in an overall high dynamic compression method, but also can be applied in the brightness (lighting layer) compression in a partial high dynamic compression manner; and besides, the complexity of the operation in the invention is extremely low, so that real time process is facilitated, the process is quick and efficient, the working performance is stable and reliable, and the scope of the application is broad.

Description

technical field [0001] The present invention relates to the field of digital image / video processing, in particular to the technical field of digital image / video compression processing, in particular to a system and method for realizing image high dynamic range compression. Background technique [0002] The ratio of the maximum brightness to the minimum brightness of an image or scene is called the dynamic range (Dynamic Range) of the image or scene. With the continuous increase in the number of bits (bit width) of image / video capture devices, and the development of post-synthesis high dynamic range (High Dynamic Range, HDR) image / video technology, high dynamic range compression is also widely used in digital images / videos Acquisition, processing and reproduction of various fields. Corresponding to the high dynamic range is the low dynamic range (Low Dynamic Range, LDR). Common low dynamic devices include: traditional monitors, printers, low bit width image sensors, etc. S...

Claims

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Application Information

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IPC IPC(8): H04N1/64H04N11/02G06T9/00
Inventor 董鹏宇党韩兵吴子辉郝腾刘翔诸悦高厚新陈晓春
Owner SHANGHAI FULLHAN MICROELECTRONICS
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