IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD
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Abstract
Provided is an image processing apparatus that can reduce degradation in image quality due to heat haze and the like. An input image memory 110 stores an input image group 200 and an input image 210. A time-series smoothed image memory 112 stores a time-series smoothed image 220 obtained by time series smoothing. A moving body removed image memory 113 stores a moving body removed image 230 that is a background image. A histogram analyzing unit 130 computes a differential of histograms of partial images for the input image 210 and the time-series smoothed image 220 or the moving body removed image 230, and calculates similarity information between the images. On the basis of the similarity information, a region dividing unit 140 divides the input image 210 into a moving body region, and a region other than the moving body region. An image correcting unit 150 performs image synthesis of the input image 210 or the time series-smoothed image 220, for each of the regions.
38 Citations
25 Claims
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1-5. -5. (canceled)
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6. An image processing device for reducing degradation in visual images, comprising:
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a smoothed image updater generating a temporally-smoothed image from images close to an input image in time; an histogram analyzer generating histograms of the input image and the temporally-smoothed image in respective windows centered at positions to be compared each other and generating similarity information of images based on difference of the histograms; a region divider dividing the input image, depending on the similarity information, into a region of moving object and a region other than the region of moving object; and an image corrector generating a synthesized image by combining the input image and the temporally-smoothed image selectively according to the regions and providing a corrected image by applying adaptive filter in space domain to the synthesized image. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. An image processing device for reducing degradation in visual images, comprising:
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a smoothed image updater generating a temporally-smoothed image from images close to an input image in time; an histogram analyzer generating histograms of the input image, the temporally-smoothed image and an object-removed image in respective windows centered at positions to be compared each other and generating similarity information of images based on difference of the histograms; a region divider dividing the input image, depending on the similarity information, into a region of moving object, a region of background and a region of quasi-moving object where through an moving object just passed; an object-removed image updater generating the object-removed image by moving-averaging only in the region of background and a region of quasi moving object of the input images or by choosing a median of pixel values from the images close to the input image; and an image corrector generating a synthesized image by combining the input image, the temporally-smoothed image and the object-removed image chosen according to the regions and providing a corrected image by applying adaptive filter in space domain to the synthesized image. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 25)
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24. An image processing method for reducing degradation in visual images by a computer, comprising the steps of:
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updating wherein the computer generates a temporally-smoothed image from images close to an input image in time; analyzing wherein the computer generates histograms of the input image, the temporally-smoothed image and a object-removed image in respective windows centered at positions to be compared each other and generates similarity information of images based on difference of the histograms; dividing the input image, depending on the similarity information, into a region of moving object, a region of background and a region of quasi-moving object where through an moving object just passed; updating wherein the computer generates the object-removed image by moving-averaging only in the region of background and a region of quasi moving object of the input images or by choosing a median of pixel values from the images close to the input image; and correcting wherein the computer generates synthesized image by combining the input image, temporally-smoothed image and the object-removed image which are chosen according to the regions and provides a corrected image by applying adaptive filter in space domain to the synthesized image.
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Specification