摘要:
An image signal processing apparatus detects a motion vector between two temporally successive frames, and includes a detection device, a calculation device, and an arithmetic device. The detection device is configured to detect the motion vector in pixel blocks between the two frames, and output an evaluation value, which represents the degree of correspondence between the two frames in the pixel blocks provided in the two frames, and which is calculated in the process of detecting the motion vector. The calculation device is configured to calculate an activity value, which represents the degree of variation in pixel value in the frame, on the basis of the direction of the detected motion vector. The arithmetic device is configured to perform an arithmetic operation to obtain an accuracy value, which represents the degree of reliability of the detected motion vector, on the basis of the evaluation value and the activity value.
摘要:
An image signal conversion apparatus for converting a SD signal (525i) into a HD signal (525p or the like). In the image signal conversion section, the SD signal is converted into the HD signal, and the image is displayed on the display section. A class code CL indicating a class of a subject pixel of the HD signal is obtained by detecting a space class and a motion class from tap pixel data corresponding to the subject pixel of HD signal which is selectively fetched from a SD signal. The controller loads coefficient data of each class according to the selected resolution into the coefficient memory from the information memory bank when the user selects the resolution. In the calculation circuit pixel data of the subject pixel of the HD signal is calculated using an estimating equation based on the tap data xi corresponding to the subject pixel of the HD signal selectively fetched from the SD signal in the tap selection circuit and the coefficient data read in class code CL from the coefficient memory.
摘要:
The present invention relates to an image signal conversion apparatus or the like preferably applied, for example, when a SD signal (525i) is converted into a HD signal (525p or the like). In the image signal conversion section (110), the SD signal is converted into the HD signal, and the image is displayed on the display section (111). A class code CL indicating a class of a subject pixel of the HD signal is obtained by detecting a space class and a motion class from tap pixel data corresponding to the subject pixel of HD signal which is selectively fetched from a SD signal. The controller (101) loads coefficient data of each class according to the selected resolution into the coefficient memory (134) from the information memory bank (135) when the user selects the resolution. In the calculation circuit (127), pixel data of the subject pixel of the HD signal is calculated using an estimating equation based on the tap data xi corresponding to the subject pixel of the HD signal selectively fetched from the SD signal in the tap selection circuit (121) and the coefficient data wi read in class code CL from the coefficient memory (134).
摘要:
On a decoding side, parameters (minimum value MIN and dynamic range DR) are optimized in such a manner that a decoded error of original signal values and restored values becomes minimum. A maximum value detecting portion 2 detects the maximum value MAX of pixels of each block composed of (3.times.3) pixels. Likewise, a minimum value detecting portion 3 detects the minimum value MIN. A subtracting portion 4 generates a dynamic range DR. A subtracting portion 5 subtracts MIN from each of input pixel values y and generates normalized values. A step width calculating portion 6 calculates a quantizing step width .DELTA. with DR. A quantizing portion 7 generates quantized values x (each of which is composed of 4 bits) with .DELTA.. A least squares method based estimating portion 8 generates decoded values y' with y and x and obtains an optimized dynamic range DR' and an optimized minimum value MIN' in such a manner that the sum of square of an error (y'-y) becomes minimum. A framing portion 11 frames x, DR', and MIN' and records the framed data on a record medium 15 through an error-correction-code adding portion 12, a modulating portion 13, and a recording portion 14.
摘要:
In the present invention, a virtual pixel (indicated by .circleincircle. in FIG. 18) is assumed near an SD pixel (indicated by .smallcircle.0 in FIG. 18) constituting an SD picture obtained by thinning an HD picture, and the pixel value of the virtual pixel is found from the HD picture. A part of the pixel value of the virtual pixel is arranged in place of a part of the pixel value of the SD pixel. Then, one of the SD pixels is used as a notable pixel so as to form a prediction tap from the SD pixel around the notable pixel and the virtual pixel. By linear combination between the prediction tap and a predetermined prediction coefficient, adaptive processing for finding a prediction value of the HD picture is carried out. In addition, a prediction error of the prediction value found by adaptive processing with respect to the HD picture is calculated, and the pixel value of the notable pixel is corrected in accordance with the prediction error. Thus, a decoded picture more proximate to an original picture may be obtained without deteriorating the coding efficiency.
摘要:
Difference signals generated in the prediction encoding process for an input digital information signal are block segmented. The maximum value and minimum value of each block are detected. In addition, a quantizing step .DELTA. is calculated. An offset detecting circuit detects a zero position flag ZR and an offset off. The zero position flag ZR represents a quantized code that includes 0. The offset off represents the deviation between value 0 of difference signals and value 0 of restored representative values. A class category adaptive predicting circuit predicts ZR and .DELTA.. These values are not transmitted in other than exception process. With predicted values ZR and .DELTA., difference signals corrected with the offset off are quantized by a quantizing circuit.
摘要:
An information processing device for tracking the image of a tracking point within a moving image wherein contents, of multiple images which are continuous temporally, are discontinuous temporally, includes: a block-matching unit for performing block matching within the moving image, wherein a processed image and an image prior to the processed image are compared to determine the position of the tracking point within the processed image; an interpolation unit for performing interpolation processing wherein the position of the tracking point within an image not subjected to the block matching, which is an image before or after the processed image within the moving image, is determined as the position of the tracking point within the processed image; and a motion-vector calculating unit for obtaining the motion vector of the tracking point based on the position of the tracking point within the processed image determined by the block-matching unit or interpolation unit.
摘要:
A device and method that serve to generate an accurate evaluation-value table and to detect a correct motion vector are provided. A weight coefficient W is calculated on the basis of correlation information of a representative-point pixel and flag-correlation information based on flag data corresponding to pixel-value difference data between a subject pixel and a pixel in a neighboring region of the subject pixel. A confidence index is generated on the basis of the weight coefficient W calculated and an activity A as an index of complexity of image data, or a confidence index is generated on the basis of similarity of motion between the representative point and a pixel neighboring the representative point, and an evaluation value corresponding to the confidence index is accumulated to generate an evaluation-value table. Furthermore, correlation is checked on the basis of positions or pixel values of feature pixels neighboring the subject pixel to determine a motion vector.
摘要:
A data storage unit is provided in which all data are stored into a memory including a plurality of memory banks and a plurality of desired data is read simultaneously, without any load to the hardware. It includes a memory controlling means including a data storage controller (20), data read controller 30 and data move controller (40), for judging, based on an access pattern representing a plurality of desired data to be read simultaneously when storing data sequentially into the memory with the data being divided among the plurality of memory banks of the memory, whether the data going to be stored are ones at locations corresponding to the access pattern, and storing all data at the locations corresponding to the access pattern into different memory banks by skipping a memory bank in which the data is to be stored, by incrementing its address, when the data to be read simultaneously are ones at the locations corresponding to the access pattern, and storing data at the locations corresponding to the access pattern into the memory bank having the bank address thereof incremented. The memory controlling means provides a control to read a plurality of desired data simultaneously from a memory (10).
摘要:
An image processing device for converting an input image into an output image whose blur is reduced more, the image processing device including: first image extracting section configured to extract a plurality of pixels composed of a pixel of the input image which pixel corresponds to a pixel of interest as a pixel to which to direct attention within the output image and predetermined pixels surrounding the pixel of the input image; first feature quantity calculating configured to calculate a first feature quantity from the plurality of pixels extracted by the first image extracting section; processing coefficient generating section; second pixel extracting section configured to extract a plurality of pixels composed of the pixel corresponding to the pixel of interest and predetermined pixels surrounding the pixel corresponding to the pixel of interest from the input image; and predicting section.