摘要:
Disclosed is a method for restoring a scan image. The method includes the steps of: measuring a blurring function oversampled with respect to a slit image obtained through a slit inclined at a predetermined angle in a vertical or horizontal direction according to the predetermined angle; and restoring a scan image to increase a resolution of an interface of a subject in the scan image obtained by obtaining the subject using the measured blurring function. Computed tomography (CT) that applies image restoration by increasing sampling can secure a precise image for computer-aided design (CAD)/computer-aided manufacturing (CAM) additionally used in a system used when actually diagnosing a patient, and thus does not require additional expenses and equipment.
摘要:
A method and apparatus for generating a holographic image from a low resolution image (510,515,520,525) frequency transformed (501) into a low resolution complex holographic image that is subsequently interpolated (502) into a high resolution complex holographic image which is encoded (503) to thereby produce a high resolution computer generated hologram (550,555). By transforming fewer pixels of the low resolution image, the amount of calculation may be reduced and the processing speed for generating the holographic image may be increased.
摘要:
A computer implemented method for A computer implemented method for applying a numerical approximation of a convolution of image I as represented by hierarchical signals a l of level l with filter f , said method including the steps of: generating a forward transformation by applying a convolution between a l and kernel hI or each level of hierarchy l and by down-sampling the result of convolved a l and hI ; generating a backward transformation by applying, for each level of hierarchy l, a convolution between kernel h 2 and an up-sampled forward transformation and combining the result with a convolution of al with kernel g ; and combining the forward transformation with the backward transformation, to yield â 0 being an approximation of a convolution between a and f, wherein kernels hI , hI , and g are optimized kernels of filter f .
摘要:
Provided is an apparatus and method for low distortion display in a portable communication terminal. In the apparatus, a comparator calculates an overall scaling coefficient. A dividing unit divides the source image into a predetermined number of parts and calculates individual frequency values of the divided image parts using Discrete Cosine Transform (DCT). An aspect ratio adjustment unit calculates individual scaling coefficients of the divided image parts using the overall scaling coefficient and the individual frequency values of the divided image parts, and scales the divided image parts according to the individual scaling coefficients respectively. A combining unit combines the scaled image parts into a single complete image. The display unit displays the single complete image combined in the combining unit.
摘要:
A method for constructing a composite image comprises determining in an alignment between at least a first and a second image based on the content of the first and second image frames, and combining in a transform domain at least the first and second images with the determined alignment to form a composite image.
摘要:
Down-sampling of an image may be performed in the DCT domain. Transform matrices are obtained for down-sampling a DCT image of size M x N to a down-sampled DCT image of size I x J. The transform matrices may be used to down-sample the DCT image directly in the DCT domain. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. The transform matrices are selected by solving an optimization problem, leading to transform matrices which achieve a desired trade-off between the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.
摘要:
For providing a technology for preferably achieving high resolution of video signals of a video signal or moving video, with a small number of frames thereof, a video signal processing apparatus comprise an input unit to be inputted a plural number of video frames, a resolution converter unit, having resolution converting characteristics differing from each other, depending on a direction thereof, by composing 2 pieces of the video frames from the inputted video frames, thereby increasing a number of pixels making up the video frames, and a mixer unit for obtaining the output video frame by mixing output results of the resolution converter unit.