摘要:
An amount-of-movement detection device which is capable of detecting the amount of movement with a high degree of accuracy when the amount of movement of an image is detected by hierarchical block matching method. An amount-of-movement detection device 1 forms image data S2.sub.n and S3.sub.n of plural hierarchies having different resolutions from each other, by input image S1.sub.n input at a first point in time, and forms multiplexed image data S2.sub.n-1 and S3.sub.n-1 of a higher hierarchy of low resolution, based on an input image S1.sub.n-1 input at a second point in time, by selecting pixels overlapping with each other from the image data of the lower hierarchy having higher resolution and reducing them in size, in order to detect a motion vector by block matching at a predetermined block unit for each of the hierarchies corresponding to the hierarchized image data S2.sub.n and S3.sub.n and the multiplexed and hierarchized image data S2.sub.n-1 and S3.sub.n-1. Thus, the accuracy in the detection of an amount of movement can be greatly enhanced.
摘要:
A delay register section 31 holds SD pixels of a luminance signal and a classification section 33 decides a class, reads a coefficient corresponding to the decision result from a coefficient RAM section 40, and outputs the coefficient to a product-sum section 38. The product-sum section 38 captures the pixel data for 17 taps from the delay register section 31, converts the pixel data into seven taps, and outputs them to the product-sum section 38. The product-sum section 38 performs the product-sum operation of pixel data and coefficients and outputs the operation result as HD pixels. An interpolation pixel operation section 42 applies a simple interpolation processing different from the case of a luminance signal to the pixel data of a color signal component to generate HD pixels of a color signal. Thus, downsizing and cost reducing can be realized.
摘要:
An information retrieval apparatus includes an obtaining unit configured to obtain dynamic ranges or re-quantization codes of a target object to be retrieved and dynamic ranges or re-quantization codes of each of comparison objects to be compared with the target object, the dynamic ranges or re-quantization codes of the target object and the dynamic ranges or re-quantization codes of the comparison objects being obtained as a result of adaptive dynamic range coding; a distance computation unit configured to compute distances between the target object and the comparison objects using the obtained dynamic ranges or re-quantization codes of the target object and the obtained dynamic ranges or re-quantization codes of the comparison objects; and a comparison unit configured to compare the distances between the target object and the comparison objects to select one of the comparison objects having a minimum distance.
摘要:
An information searching system includes an encoding apparatus and a searching apparatus. The encoding apparatus inputs information to be stored, encodes the input information in layers, and then stores the resulting per-layer encoding information in a database. The searching apparatus acquires information that has been thus encoded in layers in order from the upper layers thereof, compares the encoded information for an acquired search query to the encoded information for potential matches on a per-layer basis, decodes the information for the potential matches that resemble the search query on the basis of the comparison results, and then outputs the decoded information for the potential matches that resemble the search query. In so doing, searches are conducted rapidly and with reduced computational load.
摘要:
An information retrieval apparatus includes an obtaining unit configured to obtain dynamic ranges or re-quantization codes of a target object to be retrieved and dynamic ranges or re-quantization codes of each of comparison objects to be compared with the target object, the dynamic ranges or re-quantization codes of the target object and the dynamic ranges or re-quantization codes of the comparison objects being obtained as a result of adaptive dynamic range coding; a distance computation unit configured to compute distances between the target object and the comparison objects using the obtained dynamic ranges or re-quantization codes of the target object and the obtained dynamic ranges or re-quantization codes of the comparison objects; and a comparison unit configured to compare the distances between the target object and the comparison objects to select one of the comparison objects having a minimum distance.
摘要:
An information searching system includes an encoding apparatus and a searching apparatus. The encoding apparatus inputs information to be stored, encodes the input information in layers, and then stores the resulting per-layer encoding information in a database. The searching apparatus acquires information that has been thus encoded in layers in order from the upper layers thereof, compares the encoded information for an acquired search query to the encoded information for potential matches on a per-layer basis, decodes the information for the potential matches that resemble the search query on the basis of the comparison results, and then outputs the decoded information for the potential matches that resemble the search query. In so doing, searches are conducted rapidly and with reduced computational load.
摘要:
JPEG encoded data are entropy-decoded to quantized DCT coefficients which are sent to a prediction tap extraction circuit (41) and to a class tap extraction circuit (42). The prediction tap extraction circuit (41) and the class tap extraction circuit (42) extract what is needed from the quantized DCT coefficients to form prediction taps and class taps. A classification circuit (43) effects classification based on the class taps. A coefficient table storage unit (44) sends tap coefficients corresponding to the classes resulting from the classification to a sum of products circuit (45), which sum of products circuit (45) then effects linear predictive calculations, using the tap coefficients and the class taps, to generate decoded picture data.
摘要:
A motion determining apparatus for detecting a motion of a partial picture of an input picture signal is disclosed, that comprises a first motion detecting portion for comparing a frame difference detected for the partial picture with a predetermined threshold value and determining that the partial picture has a motion when the frame difference is larger than the threshold value, a second motion detecting portion for comparing a frame difference detected for the partial picture with a predetermined threshold value, comparing a field difference detected for the partial picture with a predetermined threshold value, and determining that there is a motion of an artificial picture when the frame difference and the field difference are larger than the respective threshold values, and an output portion for forming motion determination data with determination data that is output from the first motion detecting portion and the second motion detecting portion.
摘要:
A motion determining apparatus for detecting a motion of a partial picture of an input picture signal is disclosed, that comprises a first detecting means for detecting a frame difference of the partial picture, a second detecting means for detecting a spatial activity of the partial picture, a threshold value generating means for generating a first threshold value, a second threshold value, and a third threshold value, a comparing means having at least a first comparing portion for comparing the frame difference detected by said first detecting means with the first threshold value and a second comparing portion for comparing the frame difference detected by said first detecting means with the second threshold value, a third comparing means for comparing the spatial activity detected by said second detecting means with the third threshold value, and a motion class determining means for receiving the compared results of said first comparing portion, said second comparing portion, and said third comparing means and determining the motion of the partial picture in at least three levels.
摘要:
JPEG encoded data are entropy-decoded to quantized DCT coefficients which are sent to a prediction tap extraction circuit (41) and to a class tap extraction circuit (42). The prediction tap extraction circuit (41) and the class tap extraction circuit (42) extract what is needed from the quantized DCT coefficients to form prediction taps and class taps. A classification circuit (43) effects classification based on the class taps. A coefficient table storage unit (44) sends tap coefficients corresponding to the classes resulting from the classification to a sum of products circuit (45), which sum of products circuit (45) then effects linear predictive calculations, using the tap coefficients and the class taps, to generate decoded picture data.