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A Method for Eliminating Ghosting in High Dynamic Range Image

A technology with high dynamic range and low dynamic range, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problem that ghost images cannot be detected, and achieve the effect of eliminating ghost images

Active Publication Date: 2022-04-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the moving object (ghost) detection method of people such as Pece is only effective when the pixel value of the moving object and the pixel value of the surrounding background are arranged on both sides of the median value. If it is less than (or both are greater than) the median value, this method cannot detect ghosts

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  • A Method for Eliminating Ghosting in High Dynamic Range Image
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  • A Method for Eliminating Ghosting in High Dynamic Range Image

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0021] In 2003, Wards proposed the MTB (Median Threshold Bitmap, median threshold bitmap) algorithm: For an original image, the median value of the pixel value of the image is used as the threshold, and the pixels below the threshold are set to 0, and the pixels above the threshold are set to 0. The pixels of are set to 1 to obtain a binary image. At the same time, Ward pointed out that for static scenes, the binary image will not change due to the difference in exposure of the original image. In 2010, Pece et al. proposed a detection method for moving objects in multip...

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Abstract

The invention discloses a method for eliminating ghost images in high dynamic range images, which includes: realizing the complete detection of moving objects by adopting multi-threshold binarization processing and cooperating with XOR, AND, or operations, and can be applied to various complex scene images , and then use local histogram matching and Poisson fusion to align the moving objects to eliminate seams, and can make the tone and brightness transition between the moving objects and the background natural, and finally through multi-resolution fusion to align images, get rid of ghosts High dynamic range images of shadows. It can quickly and effectively eliminate ghosting in high dynamic range images.

Description

technical field [0001] The invention relates to the fields of computer vision technology and digital image processing, in particular to a method for high dynamic range image fusion and ghost elimination. Background technique [0002] The dynamic range (Dynamic Range) of a scene in real life refers to the ratio between the maximum brightness value and the minimum brightness value in the scene. The dynamic range of real scenes in life is as high as 10 8 :1, and the dynamic range of digital images captured by ordinary digital cameras is only 10 due to hardware limitations. 2 :1, which is far lower than the dynamic range of the actual scene, so that the captured image cannot truly reflect all the information contained in the scene, and the information in the high-brightness area or low-brightness area in the scene will appear as overexposure or Underexposure. Such images are called low dynamic range (LDR) images. In order to solve this problem, high dynamic range (HDR) imagi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/40G06T5/50
CPCG06T5/007G06T5/50G06T5/40G06T2207/20208
Inventor 王鹏钱沄涛
Owner ZHEJIANG UNIV