System and method for realizing image high dynamic range compression

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...

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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 loss of image contrast, fast and efficient processing, and low algorithm complexity. System and method for realizing image high dynamic range compression with relatively low cost, stable and reliable working performance, and wide application range

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