Image interpolation apparatus and method
It is an image-in-equipment technology, which is applied in the directions of image communication, image data processing, image-image conversion, etc., and can solve problems such as image degradation and difficult prevention of image quality.
Inactive Publication Date: 2008-04-09
SAMSUNG ELECTRONICS CO LTD
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However, since such a conventional image interpolation device performs image interpolation by means of only one kind of filter, for example, as Figure 2B As shown, it is difficult to prevent the degradation of image quality caused by aliasing in the high-frequency image signal area
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[0036] Next, the present invention will be described in detail with reference to the accompanying drawings.
[0037] Referring to FIG. 3 , an image interpolation device 300 according to a preferred embodiment of the present invention includes an image signal storage part 310 , a filter selection part 320 , a control part 330 , a coefficient storage part 340 and an interpolation filter 350 .
[0038] Generally, a device that increases the resolution of an image by increasing the number of pixels using an interpolation method can be called by various names such as a scaler, a format conversion device, an image up-scaling device, and the like. Herein, however, such a device will be referred to as an image interpolation device.
[0039] The image interpolation device 300 scales up the input image signal of the first resolution in the output image signal of the second resolution according to a predetermined conversion rate of the resolution, ie increases its resolution. The conver...
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An image interpolation apparatus and an image interpolation method. The image interpolation apparatus including an image signal storage section which stores input image signals of a first resolution, a filtering selection section which outputs a filtering selection signal, a control section which calculates an interpolation position for each of a given number of input image signals, a coefficient storage section which stores a plurality of interpolation coefficients classified by the filters, and which outputs the given number of interpolation coefficients corresponding to the filtering selection signal and to the given number of calculated interpolation positions, and an interpolation filter, to which the given number of input image signals and the given number of interpolation coefficients are input from the image signal storage section and the coefficient storage section, respectively, and which executes the selected filtering to output image signals of a second resolution. Different filters are, thus, selectively applied according to frequencies of input images when up-scaling and transforming an image input in a predetermined resolution into another image of a different resolution, whereby degradation of image quality can be avoided.
Description
technical field [0001] The present invention relates to an image interpolation device and an image interpolation method, and more particularly to an image interpolation device and an image interpolation method in which an image input at a predetermined resolution is increased and the Different filters convert the input image into images with different resolutions, thereby increasing the resolution of the image. Background technique [0002] Generally, when an image different from the resolution previously determined in the image display device is input to the image display device from an image signal source, it is necessary to convert the resolution of the input image to correspond to the resolution previously determined in the image display device. When processing an image signal is called scaling or format conversion, the resolution of the image is increased or decreased by converting the number of pixels. [0003] In particular, when an image having a lower resolution th...
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IPC IPC(8): H04N7/01H04N5/14H04N9/64G06T3/40G09G5/00G09G5/36G09G5/391
CPCG06T3/4023B60N2/894B60N2002/899
Inventor 李钟桓
Owner SAMSUNG ELECTRONICS CO LTD