Adjusting method and device with high dynamic range

A high dynamic range and adjustment method technology, applied in the field of communication, can solve the problems of not maintaining the order of pixel brightness, high computational complexity, halo, etc.

Inactive Publication Date: 2010-05-12
VIMICRO CORP
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Problems solved by technology

In the process of using the local mapping HDR image visualization method, since the local mapping does not maintain the pixel brightness order in the original scene image, different degrees of noise appear in the algori

Method used

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  • Adjusting method and device with high dynamic range
  • Adjusting method and device with high dynamic range
  • Adjusting method and device with high dynamic range

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Embodiment Construction

[0090] The technical solution in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, what is described is only a part of the present invention, not the whole. Based on the present invention, all other inventions obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0091] The core idea of ​​the present invention is to map a high dynamic range image into a low dynamic range image by using the high dynamic range adjustment technology of global mapping of a single frame image, and through adaptive global brightness adjustment, histogram adjustment and color correction, The visible details in the very bright and very dark areas of the image are guaranteed to the greatest extent, and the contrast and color of the image can be made to conform to the human visual effect through parameter control in the...

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Abstract

The invention discloses an adjusting method with high dynamic range which comprises the following steps: obtaining the brightness range of images with low dynamic range according to the brightness of the images with high dynamic range, wherein the brightness range of the images with low dynamic range is the brightness range which can be displayed by a display device; and conducting linear mapping and histogram equalization on obtained results of the brightness range of the images with low dynamic range, and obtaining the images with low dynamic range. In the invention, high dynamic range adjustment technology for global mapping of single-frame images is more reasonable so as to improve the image quality, the details of bright and dark environments can be reasonably displayed simultaneously, algorithm is simple and practical, and discontinuous brightness caused by the fusion of local mapping and multi-frame images is avoided; and by providing users with the factors for controlling the image contrast and detail richness, the images are convenient for being adjusted to the effect which is more acceptable for human eyes.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a high dynamic range adjustment method and device. Background technique [0002] The brightness values ​​displayed in the real scene have a very wide dynamic range. From the starlight in the night sky to the dazzling sun, the brightness range emitted by the scene covers a dynamic range of more than nine orders of magnitude (10cd / m). Among them, the brightness of an image The ratio between the maximum value and the minimum value of the level is called the dynamic range (Dynamic Range). [0003] Through the automatic adjustment of the pupils of the eyes, from the starlight in the night sky to the dazzling sun, the dynamic range of the human eye's ability to distinguish objects can reach 100,000,000:1. Perceive the scene brightness in a range of about five orders of magnitude (that is, the human eye can distinguish a brightness range of 10000:1), that is, the human ey...

Claims

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Application Information

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IPC IPC(8): H04N5/20
Inventor 卢晓鹏
Owner VIMICRO CORP
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