Image defogging device and image defogging method
A defogging device and image technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as unsatisfactory defogging effect, achieve the effect of increasing image processing speed, improving efficiency, and reducing computing overhead
Inactive Publication Date: 2016-08-03
HITACHI LTD
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Although this invention also improves the speed of single-frame defogging processing algorithm in video multi-frame processing, it involves a simple histogram equalization image enhancement method, which is not aimed at defogging applications, so the defogging effect is not ideal
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[0056] figure 2 A schematic structural block diagram of an image processing system according to the present invention is shown. The image processing system according to the present invention includes a camera 100 , an image defogging device 200 , an output unit 300 and a shared memory 90 . The camera device 100 is used for capturing images (in particular, a continuous sequence of video images) and transmitting the images to the image defogging device 200 . The image defogging device 200 is used to perform sharpening processing (also called defogging processing) on the image provided by the camera device 100 . The output unit 300 is used for displaying the image sharpened by the image defogging device 200 . The shared memory 90 is used to store various data.
[0057] The image defogging device 200 includes a preprocessing unit 10 , a core frame parameter obtaining unit 20 , a core frame parameter storage unit 30 , a common frame parameter obtaining unit 40 , an image defo...
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The invention relates an image demisting device, and further relates to a corresponding image demisting method and an image processing system. The image demisting device comprises a preprocessing unit, a core frame parameter gaining unit, an ordinary frame parameter gaining unit and an image demisting unit, wherein the preprocessing unit is used for classifying an input image as a core frame or an ordinary frame, each pixel of the input image is provided with a distance parameter depending on an object distance, the core frame parameter gaining unit is used for gaining the distance parameter of each pixel of the core frame and a pixel distance parameter of a background image of the core frame, the ordinary frame parameter gaining unit is used for gaining the distance parameter of each pixel of the ordinary frame, and the image demisting unit conducts demisting processing on the core frame according to the distance parameter gained by the core frame parameter unit and conducts demisting processing on the ordinary frame according to the distance parameter gained by the ordinary frame parameter gaining unit, wherein the ordinary frame is divided into a background part and a foreground part by the ordinary frame parameter gaining unit.
Description
technical field [0001] The present invention relates to an image defogging device, an image defogging method and an image processing system, in particular to the field of image defogging based on an atmospheric model and using the redundancy of video image sequences to improve the efficiency of image defogging processing. Background technique [0002] China's geographical environment is complex and the weather is diverse. Fog is often seen in most areas, and some areas are also affected by sand and dust. Fog and dusty weather reduce the visibility of outdoor video images. In addition, in large cities, the visibility of outdoor video images will also be reduced due to air quality problems. The reduction in visibility has a great impact on the quality of video images. Especially for the field of security monitoring, the impact is more obvious. Fog image clarity is an urgent practical requirement in the field of image processing. At the same time, in recent years, the break...
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IPC IPC(8): G06T5/00G06T7/20
Inventor 沙浩三好雅则伊藤诚也李媛
Owner HITACHI LTD