Adaptive Image Edge Restoration Device and Method
A repair method and self-adaptive technology, applied in the field of repairing images, can solve the problems of huge amount of calculation, overall image distortion, time-consuming and other problems
Active Publication Date: 2017-06-09
AUTOMOTIVE RES & TESTING CENT
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Problems solved by technology
However, using low-pass filtering can easily cause overall image distortion; using error correction for sharp edges or linear minimum mean square error, the calculation amount is too large, which may lead to long calculation time; if edge-oriented fast interpolation method or gray The polynomial interpolation method needs to try the threshold value many times before it can be executed, so it is quite labor-intensive
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[0034] The present invention can restore blur and jagged edges of the enlarged low-resolution image, so that the edge of the enlarged image can appear smooth and improve the quality of image output.
[0035] Please refer to figure 1 , which is a schematic diagram of the structure of the device in this embodiment. As shown in the figure, the device is provided with an imaging unit 10. The imaging unit 10 can be a video camera, which can shoot images for inputting an original image. The imaging unit 10 is also connected to an image processing unit. Unit 20, the image processing unit 20 includes a sharpening filter 22, the sharpening filter 22 may be a Laplacian filter, wherein the present invention uses the Laplacian filter as an embodiment Description, but not limited thereto, to convert the original image input by the imaging unit 10 into a sharpened edge image; the sharpening filter is also connected to a processor 24, and the processor 24 is to convert the original image and...
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The invention provides a self-adaptive image edge restoring device and method. According to the device and method, an original image is input through an image taking unit, and the device is electrically connected with an image processing unit. The method includes the steps that the original image is converted into an image with the edge sharpened by a sharpening filter, the original image and the image with the edge sharpened through a processor are added so that after an enhanced image is synthesized, the edge of the enhanced image can be captured through an edge detector and a differential edge image can be obtained, then, horizontal restoration and vertical restoration are selectively used by the processor according to the deviation direction of the differential edge image, and the differential edge image is restored so that a restored image can be formed to be displayed on an image output unit. According to the device and method, a blurred image generated by an amplified edge can be restored when the image is amplified, and the edge of the image is enhanced so as to improve the sawtooth phenomenon.
Description
technical field [0001] The present invention relates to a technology for repairing images, in particular to an adaptive image edge repairing device and method capable of improving blurred edges and jagged edges. Background technique [0002] In image monitoring, it is often necessary to observe distant images, so it is necessary to zoom in on the images to monitor distant images. However, when images with low resolution are desired to obtain higher resolution images, polynomial interpolation is generally used to obtain enlarged images. However, after zooming in However, the image will produce common distortions such as blurring or aliasing. The main reason for the blur is that when interpolation is performed, the effect will be like a low-pass filter that filters out the high-frequency part of the image, resulting in a blurred image. In addition, the edge of the enlarged image will be irregular due to misalignment during interpolation. Arrangement, and then produce the phen...
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IPC IPC(8): H04N5/21
Inventor 杨志弘廖育昇许立佑
Owner AUTOMOTIVE RES & TESTING CENT