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High-quality display method of infrared high-bit-width digital image

A technology of digital image and display method, which is applied in image communication, parts of color TV, parts of TV system, etc., to achieve the effect of compressing dynamic range, easy to realize and easy to observe

Active Publication Date: 2020-12-01
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Can be widely used in various infrared and high bit width image detection systems

Method used

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  • High-quality display method of infrared high-bit-width digital image
  • High-quality display method of infrared high-bit-width digital image
  • High-quality display method of infrared high-bit-width digital image

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] A high-quality display method of an infrared high-bit-width digital image of the present invention specifically comprises the following steps:

[0041] Step 1: Gamma transformation guided by EOG gradient energy function

[0042] Simple linear mapping is only suitable for the case where the original high-bit-width image has relatively uniform grayscale distribution. For images with relatively concentrated grayscale, the linear mapping result will appear darker or brighter overall. Gamma correction is beneficial to improve the contrast of the image. A single Gamma correction may lead to the weakening and loss of details in local areas in the image, so set a darker S 1 , Moderate S 2 , brighter S 3 Three intervals, each interval sets multiple discrete gamma values ​​to adjust the image to multiple brightness levels. In the experiment of...

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Abstract

The invention discloses a high-quality display method for an infrared high-bit-width digital image, and belongs to the field of image processing and infrared imaging. The display method comprises thefollowing four steps: S1, guiding gamma correction processing on a normalized original image by an EOG gradient energy function to generate a plurality of multi-brightness images; S2, respectively carrying out multi-scale guided filter layering and detail enhancement fusion on the plurality of images; S3, fusing the three enhanced multi-brightness images to obtain a fused multi-brightness image; and S4, performing dead pixel filtering and dynamic range adjustment on the fused image. Tests of high-bit-width digital images with different scene characteristics prove that the method can enhance image details, increase contrast and compress a dynamic range on the basis of keeping original hierarchical structures of various scene images. An output image has a good visual effect, and human eye observation and other subsequent work are facilitated. The method is suitable for high-quality display of high-bit-width digital images on a common display.

Description

technical field [0001] The invention belongs to the field of image processing and infrared imaging, in particular to a high-quality display method of infrared high-bit-width digital images, which is a high-quality display of infrared high-bit-width digital images based on EOG-guided Gamma transform multi-scale filters and image fusion method. Background technique [0002] With the improvement of engineering technology, infrared equipment with high dynamic range has been widely used in engineering. These devices have higher levels of sensitivity to detect subtler differences in heat, resulting in images with more gray levels per pixel. At present, the common high-bit-width images are 10bit, 12bit, 14bit, and 16bit, while ordinary displays are only 8bit, and each pixel has fewer gray levels. If a simple linear compression is performed on the image recently, it will cause a lot of loss of details in the high-bit-width image, and the visual effect is not good, which is not con...

Claims

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Application Information

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IPC IPC(8): H04N5/355H04N5/33
CPCH04N5/33H04N25/57
Inventor 陈斐然蔡敬菊张建林彭先蓉徐智勇魏宇星
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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