摘要:
Brightness values of image frames are collected and counted to form a brightness distribution. The brightness distribution of the image frames is compared with predetermined brightness distributions. Brightness values of all pixels of successive image frames are adjusted according to a result of the comparison, so as to improve image contrast.
摘要:
A video system includes: analyzing video data, having a block; performing a transition change detection for determining a spatial intensity transition within the block; performing a block-wise similarity measurement on the block in the video data for identifying a blocking artifact; and filtering with a two dimensional cross filter every pixel in the block for removing the blocking artifact.
摘要:
Low complexity edge detection and DCT type selection method to improve the visual quality of H.264/AVC encoded video sequence is described. Encoding-generated information is reused to detect an edge macroblock. Variance and Mean Absolute Difference (MAD) of one macroblock shows a certain relationship that is able to be used to differentiate the edge macroblock and the non-edge macroblock. Also, the variance difference of neighbor macroblocks provides a hint for edge existence. Then, a block-based edge detection method uses this information. To determine the DCT type for each block, the detected edges are differentiated as visual obvious edge, texture-like edge, soft edge and strong edge. 8×8 DCT is used for texture-like edges and the 4×4 DCT is used for all the other edges. The result is an efficient and accurate edge detection and transform selection method.
摘要:
In one embodiment, a coding mode selection method is provided to improve the visual quality of an encoded video sequence. The coding mode is selected based on a human visual tolerance level. Picture data may be received for a video coding process. The picture data is then analyzed to determine human visual tolerance adjustment information. For example, parameters of a cost equation may be adjusted based on the human visual tolerance level, which may be a tolerance that is based on a distortion bound that the human visual system can tolerate. The picture data may be analyzed in places that are considered visually sensitive areas, such as trailing suspicious areas, stripping suspicious areas, picture boundary areas, and/or blocking suspicious areas. Depending on what kind of visually sensitive area is found in the picture data, a parameter in a cost equation may be adjusted based on different visual tolerance thresholds. The coding mode is then determined based on the cost.
摘要:
A high thermal conductivity thermal interface material compound includes 53% by weight of polyethylene glycol, 42% by weight of silicon carbide, and 5% by weight of lithium ions. The method of fabricating the thermal interface material includes the steps of: filling the above-described compound in a container and blending them to form aggregative compound by a blender; mixing the compound by a rolling machine to disperse the aggregative compound and filling the compound to another container; blending the compound and breaking the air bubble generated thereof, and pumping the air out of the container by a vacuum pump at the same time, to fabricate the high thermal conductivity thermal interface material compound without air bubbles.
摘要:
An apparatus and a method for detecting the sync signal of a data signal are disclosed. The apparatus includes a clamping unit, a subtraction unit and a detection unit. The clamping unit receives the data signal and varies the level of the data signal. The subtraction unit coupled to the clamping unit subtracts the level of the data signal from that of the output of the clamping unit and then outputs the subtracting result. The detection unit coupled to the subtraction unit detects the subtracting result from the subtraction unit and judges the sync signal in the data signal accordingly.
摘要:
Brightness values of image frames are collected and counted to form a brightness distribution. The brightness distribution of the image frames is compared with predetermined brightness distributions. Brightness values of all pixels of successive image frames are adjusted according to a result of the comparison, so as to improve image contrast.
摘要:
Selecting a corresponding procedure of dithering according to a general pattern of gray levels of sub-pixels of each color of an input image. This will enable the input image to be displayed on a display with a lower bit depth.
摘要:
In one embodiment, a 3:2 pull-down detection component of a video encoder uses motion vectors to determine whether a repeated field exists in a video sequence. The 3:2 pull-down detection component uses field motion vectors determined by a motion estimator and compares the field motion vectors to a threshold to determine whether a repeated field exists. If a repeated field exists, a video encoder can then eliminate the repeated field.
摘要:
A method for improving depth for field (DOF) in microscopic imaging, the method comprising combining a sequence of images captured from different focal distances to form an all-focus image, comprising computing a focus measure at every pixel, finding the largest peaks at each position in the focus measure as multiple candidate values and blending the multiple candidates values according to the focus measure to determine the all-focus image.