High dynamic range image adaptive reproduction display method

A high dynamic range, display method technology, applied in the field of image processing, can solve the problems of not reflecting the response of the human visual system, loss of image detail information, image contrast compression, etc., to improve and optimize tone mapping, suppress light Halo effects, effects that reduce complexity

Active Publication Date: 2017-12-08
BEIJING INST OF ELECTRONICS SYST ENG
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Problems solved by technology

Although the global mapping technology is relatively simple and can better maintain the overall contrast effect of the image, this method does not take into account the spatial position of the image pixels or the neighborhood related information between them, and t

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  • High dynamic range image adaptive reproduction display method
  • High dynamic range image adaptive reproduction display method
  • High dynamic range image adaptive reproduction display method

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[0060] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0061] In the field of imaging applications, the ratio between the maximum and minimum brightness values ​​in an image is called the dynamic range. Most image data range is generally 8 bits, that is, the pixel gray value is between 0-255, while high dynamic range images store larger orders of magnitude data, such as 10 bits or 16 bits, which can span a very wide range of pixels Grayscale or brightness levels can better express real-world scenes. Therefore, in order to effectively display high dynamic range images, the pre...

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Abstract

The invention discloses a high dynamic range image adaptive reproduction display method. The method comprises the steps that a high dynamic range image is read so as to obtain the grayscale or brightness channel of the image; local mapping transformation is performed on the grayscale or brightness channel of the image by using a nonlinear tone mapping window model; local contrast measure calculation is performed based on a PLIP model; adaptive optimization double guidance image mapping constraints are designed to guide an objective optimization function to obtain the optimal result; and the result image is outputted. The high dynamic range image can be effectively displayed, the image edge and image detail information can also be maintained and the halo effect can be suppressed so as to have great adaptive capability and robustness, and the processing effect proves that the method has high practicality.

Description

technical field [0001] The invention relates to the field of image processing, and more specifically, to an adaptive reproduction and display method of high dynamic range images. Background technique [0002] For the photosensitive device of an imaging device, the dynamic range refers to the range between the gray scale or brightness value contained in the image from "darkest" to "brightest". The dynamic range of the image controls the extremely dark areas and The ability to show the details of extremely bright areas in one image at the same time. The range of most image data is generally 2 orders of magnitude or 8 bits, that is, the pixel gray value is between 0-255, and the human visual system can perceive scene brightness in a range of about 5 orders of magnitude. High dynamic range images can generally store larger orders of magnitude or more bytes of data, such as 10 bits or 16 bits, which can span a very wide range of pixel grayscale or brightness levels, and can bett...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/008G06T2207/10004G06T2207/20192
Inventor 高明
Owner BEIJING INST OF ELECTRONICS SYST ENG
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