摘要:
A method of estimating a particular motion vector (DR(x, n+α)) for a particular pixel, having a particular spatial position and being located at a temporal position (n+α) intermediate a first image and a second image of a sequence of video images, on basis of a first motion vector field (D3(x, n−1)) being estimated for the first image and on basis of a second motion vector field (D3(x, n)) being estimated for the second image is disclosed. The method comprises: creating a set of motion vectors (Dp, Dn, Dc) by selecting a number of motion vectors from the first motion vector field (D3(x, n−1)) and second motion vector field (D3(x, n)), on basis of the particular spatial position of the particular pixel; and establishing the particular motion vector (DR(x,n+α)) by performing an order statistical operation on the set of motion vectors (Dp, Dn, Dc).
摘要:
A method of converting an input image into an enhanced output image is disclosed. The method comprises: detecting (606) whether a particular pixel of the input image corresponds to an edge in the input image; establishing (606) an orientation for the particular pixel; and computing a final pixel value of the enhanced output image, corresponding to the particular pixel, by means of an orientation dependent sharpening filtering operation on basis of the particular pixel and a number of pixels being located in spatial neighborhood of the particular pixel, the orientation dependent sharpening filtering having a first component (702) and a second component (704), a first angle between a first orientation of the first component and the established orientation of the particular pixel being equal to a first predetermined value and a second angle between a second orientation of the second component and the established orientation of the particular pixel being equal to a second predetermined value, the second orientation and the first orientation being mutually different.
摘要:
A method and apparatus is disclosed for creating a story-board of video frames from a stream of video data wherein only the video frames of the story-board are transmitted to the portable electronic devices. A content controlled summary is generated from input video data. The content control summary is then synchronized with a continuous audio signal. The summary is encoded along with the continuous audio for transmission.
摘要:
A selector (502) for selecting a background motion vector for a pixel in an occlusion region of an image, from a set of motion vectors being computed for the image, comprises: computing means (510) for computing a model-based motion vector for the pixel on basis of a motion model being determined on basis of a part of (402-436) a motion vector field (400) of the image; comparing means (511) for comparing the model-based motion vector with each of the motion vectors of the set of motion vectors; and selecting means (512) for selecting a particular motion vector of the set of motion vectors on basis of the comparing and for assigning the particular motion vector as the background motion vector.
摘要:
An image processing apparatus (100) comprises: receiving means for receiving a video signal representing input images; a film-detector unit (108) for detecting whether the input images have been captured by a film camera or by a video camera; and a sharpness enhancement unit (106) for calculating sharpness enhanced images on basis of the input images. The sharpness enhancement unit (106) is controlled by the film-detector unit (108), whereby the sharpness enhancement is larger if the film-detector unit (108) has detected that the input images have been captured by the film camera than if the film-detector unit (108) has detected that the input images have been captured by the video camera.
摘要:
An image conversion unit (200) for converting a first image with a first resolution into a second image with a second resolution being higher than the first resolution, comprises a filter (112) to provide filtered pixel values of the first image to a coefficient-calculating means (106) for calculating a first filter coefficient on basis of the filtered pixel values. The coefficient-calculating means (106) is arranged to control an adaptive filtering means (104) for calculating a second pixel value of the second image on basis of a first pixel value of the first image and the first filter coefficient.
摘要:
A method, a circuit arrangement and a display device which suppresses motion blur due to motion integration carried out along a motion trajectory on the image data, which occurs in matrix type displays in which a motion trajectory is integrated by the viewer and/or the display, includes an inverse integration filtering of the video signal. To avoid de-blurring in image regions where motion cannot be detected, or image is low and to avoid noise modulation, motion estimation as well as further image characteristic are used.
摘要:
A motion estimation unit for estimating a motion vector for a group of pixels of an image of a series of images, comprises: generating means for generating a set of motion vector candidates for the group of pixels; matching means for calculating match errors for the respective motion vector candidates of the set; selecting means for selecting a first one of the motion vector candidates as the motion vector for the group of pixels, on basis of the match errors; and testing means for testing whether the group of pixels has to be split into sub-groups of pixels for which respective further motion vectors have to be estimated, similar to the motion vector being estimated for the group of pixels, the testing based on a measure related to a particular motion vector.
摘要:
In macroblock-based coding systems such as MPEG-1 video, MPEG-2 video and MPEG-4 visual, an encoder in the invention decides on macroblock level whether the macroblock is to be encoded or whether local motion-compensated interpolation processing at a compatible decoder can be used to reconstruct the macroblock. In the latter case, the macroblock is skipped. If the decoder detects a skipped macroblock, the decoder reconstructs the macroblock and overwrites the data conventionally generated in MPEG under the skipped macro-block condition.
摘要:
In a method of processing input fields (I) of a picture signal to obtain interpolated fields (O) located temporally between the input fields (I), motion vectors (MV) are provided (30) between input fields (I), whereafter a quality (Err) of the motion vectors (MV) is assessed (40). In dependence upon the assessed quality (Err), the motion vectors (MV) are adapted (50, 60) such that both decreased and increased motion vector lengths occur in respective interpolated fields (O). The interpolated fields (O) are obtained (20) from the input fields (I) in dependence upon the thus adapted motion vectors (k*MV).