摘要:
An image conversion unit (100) for converting an input image with an input frequency spectrum into an output image with an output frequency spectrum, the output frequency spectrum having more relatively high frequency components than the input frequency spectrum is disclosed. The image conversion unit comprises: means for providing (102) an intermediate image on basis of the input image; and combining means (104) for combining a high frequency signal with the intermediate image into the output image by means of error diffusion.
摘要:
The invention relates to a method for providing a motion parameter set and/or a picture repetition pattern from an input video signal, in particular for de-interlacing a video signal with using a candidate motion parameter set weighted with a picture repetition pattern value for calculating a motion compensated pixel from a pixel value of a first image. To provide motion compensation which accounts for field repetition patterns, minimizing an error criterion between at least one pixel value of a second image and at least the motion compensated pixel value by iterating the calculation of the motion compensated pixel with at least two candidate motion parameters sets and/or at least two picture repetition values, and putting out the candidate motion parameter set and/or the picture repetition value which provides the minimized error criterion is proposed.
摘要:
A spatial filter unit (200) for converting a first input signal (U) comprising input samples, into an output signal comprising output samples, is disclosed. The spatial filter unit (200) comprises: a coefficient-determining means (106) for determining a first filter coefficient; and an adaptive filtering means (104) for computing a first one of the output samples on basis of a first one of the input samples and the first filter coefficient. The coefficient-determining means (106) are arranged to determine the first filter coefficient on basis of a second input signal (Y) being correlated to the first input signal (U).
摘要:
A luminance and color separation filter unit (300, 400, 500, 600, 700) for extracting a luminance signal (Y) and two color signals (U, V) from a composite color television signal (CVBS), comprising a chrominance (C) signal being modulated on a subcarrier which is located in the high-frequency part of the frequency spectrum of the luminance signal (Y), is disclosed. The filter unit (300, 400, 500, 600, 700) is arranged to compute at least one value of a set of values comprising an output luminance value (Y(x, n)) of a particular output pixel (x), a first color value (U(x, n)) of the particular output pixel (x) and a second color value (V(x, n)) of the particular output pixel (x) on basis of a first (F1), a second (F2) and a third (F3) sample derived from the composite color television signal (CVBS), where the first (F1), the second (F2) and the third (F3) sample have mutually different sub-carrier phases.
摘要翻译:一种用于从复合彩色电视信号(CVBS)提取亮度信号(Y)和两个颜色信号(U,V)的亮度和颜色分离滤光器单元(300,400,500,600,700),包括色度(C )信号被调制在位于亮度信号(Y)的频谱的高频部分中的子载波上。 滤波器单元(300,400,500,600,700)被布置为计算包括特定输出像素(x)的输出亮度值(Y(x,n))的一组值的至少一个值, 基于第一(F 1)的特定输出像素(x)的第一颜色值(U(x,n))和特定输出像素(x)的第二颜色值(V(x,n) 1),来自复合彩色电视信号(CVBS)的第二(F 2 N 2)和第三(F 3 N 3)样本,其中第一( F< 1>),第二(F 2 N 2)和第三(F 3 N 3)样品具有相互不同的子载流子相。
摘要:
An image conversion unit (100,200,300) for converting a first image (101) with a first resolution into a second image (103) with a second resolution, the second resolution being higher than the first resolution is disclosed. The image conversion unit (100,200,300) comprises a noise generator (106) for generating noise and a combining unit (104) arranged to add the noise to the second image (103). Preferably the noise that is added comprises spectral components which are in a part of a frequency spectrum which is above the Nyquist frequency of the first image. Optionally the image conversion unit comprises a noise measurement unit (302) to control the noise generator (106).
摘要:
An image conversion unit (200) for converting a first input image with a first resolution into an output image with a second resolution, comprises a coefficient-determining means (106) for determining a first filter coefficient on basis of pixel values of the first input image. The coefficient-determining means (106) is arranged to control an adaptive filtering means (104) for calculating a pixel value of the output image on basis of an input pixel value of the first image and the first filter coefficient. The adaptive filtering means (104) is arranged to perform a non-linear operation.
摘要:
The motion estimation unit (100) being arranged to estimate a current motion vector for a first group (212) of pixels, comprises: a generating unit (106) for generating a set of candidate motion vectors for the first group (212) of pixels, with the candidate motion vectors being extracted from a set of previously estimated motion vectors; a match error unit (102) for calculating match errors of respective candidate motion vectors; and a selection unit (104) for selecting the current motion vector from the candidate motion vectors. The motion estimation unit (100) is arranged to modulate a predetermined match error threshold on basis of a result of segmentation for the first image. If the match error of a first one of the candidate motion vectors is below the current predetermined match error threshold then the first one of the candidate motion vectors is selected and evaluation of further candidate motion vectors for the first group of pixels is skipped.
摘要:
In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM2) between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, second vectors are estimated (ME, PM1) between an image with a second sub-sampling phase and an earlier image sub-sampled with a first subsampling phase, and the first and second vectors are combined (CD) to obtain output motion vectors (MV).
摘要:
In a motion-dependent noise filtering (MD, NRF), a received image signal and a delayed (3) image signal are combined in dependence upon both a local amount of motion and a global amount of motion in the image signals.
摘要:
In a method for determining motion vectors for each of the plurality of image blocks (X, O) together constituting a television image, motion vectors are computed only for selected ones (X) of the image blocks, and motion vectors for the remaining ones (O) of the image blocks are interpolated at least in part from the computed motion vectors of the selected blocks.