摘要:
A coding device is comprised of an initial resolution coding unit for coding an initial resolution image sub-sampled from an image at every interval of predetermined pixels, and a high resolution coding unit for coding images at sub-sampling intervals sequentially halved, wherein said high resolution coding unit comprises a pixel value predicting means for, out of the pixels that should be coded in present resolution, predicting a value of a pixel being positioned at a center of its adjacent four pixels already coded in previous resolution from said adjacent four pixels with a linear interpolation, and predicting a value of a remaining pixel from its adjacent four pixels having the above pixel at a center thereof with the linear interpolation, said adjacent four pixels being positioned in an upper, lower, left and right sides of the above pixel, a prediction error calculating means for obtaining a residual between the pixel value of the to-be-coded pixel and the predicted value, and a variable length coding means for coding the residual.
摘要:
The present invention provides a worked molybdenum-alloy material that can be used at higher temperatures than at least temperatures at which known TZM alloys are used. A worked molybdenum-alloy material having high strength and high toughness includes at least one of carbide particles, oxide particles, and boride particles and fine nitride particles dispersed by internal nitriding of an untreated worked molybdenum-alloy material in which a nitride-forming-metal element is dissolved to form a solid solution in a molybdenum matrix and at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed. The worked molybdenum-alloy material is manufactured by subjecting a worked alloy material, which has a matrix composed of molybdenum, in which at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed and in which at least one of titanium, zirconium, hafnium, vanadium, niobium, and tantalum is dissolved to form a solid solution, to multi-step internal nitriding treatment including a stepwise increase of the treatment temperature.
摘要:
This invention relates to a photovoltaic device, such as a solar cell or a photosensor, which comprises an amorphous silicon semiconductor photosensitive layer and, as disposed on respective sides thereof, a transparent electrode and a rear electrode. The rear electrode is a multi-layer structure constructed by alternately successive depositions, each in a thickness of 0.3 to 50 nm, of two or more metals selected from the group consisting of Cu, Ag, and Au. In using such a Cu/Ag multi-layer structure or an Au/Ag multi-layer structure as the rear electrode, the thickness of each Cu or Au layer is controlled at 0.3 to 20 nm and that of each Ag layer at 1 to 50 nm. The total thickness of the rear electrode is 20 nm to 1 .mu.m. This construction insures improved photoelectric conversion efficiency and improved reliability of the device.
摘要:
A Bi-Pb-Sr-Ba-Ca-Cu-O system superconductor having a composition of:Bi.sub.l Pb.sub.m Sr.sub.p Ba.sub.q Ca.sub.y Cu.sub.z O.sub.xwherein l, m, p, q, y and z satisfy the following inequalities:0.50
摘要:
A machine translation system for automatically effecting translation from Japanese the source language into another or target language. Conventional translation systems entail problems, e.g., the reduction in processing efficiency owing to the need for an additional step such as pre-editing prior to translation. In the machine translation system of the present invention, the main process step for mechanical translation, the syntactic analysis step, is based on the determination of whether or not any modification relationship can be established for each pair of adjacent words by extracting a rule corresponding to that combination from a part of speech matrix table in which analysis rules of the source language are described with respect to the parts of speech of the corresponding pair of words to modifying words and head words; successively stacking each of these word combinations for which a modification relationship has been established for use as a analysis tree element; and displaying an analysis tree corresponding to the original sentence in the source language from the stacked analysis tree segments. The number of syntactic rules is thereby limited to the square of the number of individual parts of speech, the need for pre-editing is eliminated and Japanese sentences in every style can be translated with improved efficiency.
摘要:
To provide a motion vector detection device capable of rapidly and accurately detecting a main motion vector from plot data on a computer screen. An edge extraction unit (201) extracts edge points from each of a previous frame and a current frame. A feature point extraction unit (202) extracts, as a feature point, an edge point which is uniquely determined based on a relative positional relationship with another at least one edge point within a frame to which the edge points belong, from among a plurality of extracted edge points. A feature point pair extraction unit (203) extracts, as a feature point pair, a pair of feature points having a common positional relationship, among pairs of a feature point of the previous frame and a feature point of the current frame. A motion vector calculation unit (240) calculates, as a motion vector, a difference between coordinate values of the feature point pair extracted from the previous frame and the current frame.
摘要:
An image is divided into subbands by wavelet transform using the Haar function as the base, and the lowest-frequency LL subband is entirely encoded. LH, HL, and HH subband coefficients which belong to the wavelet decomposition level of each hierarchy are encoded such that coefficients at the same spatial position are encoded based on a resolution or quantization accuracy mapping at each spatial coordinate. Additionally, an updated region detecting means detects an updated region from a plurality of sequential frames forming the two-dimensional signal, and obtains a changing period during which a signal value changes in each region. A resolution or quantization accuracy is set for each spatial coordinate based on the changing period, and a coefficient map is generated in which the resolution or quantization accuracy of the updated region differs from that of a region other than the updated region.
摘要:
This moving image coding device has an update region detection unit, a coding target region detection and cache update unit, and a coding unit. The update region detection unit compares a reference frame and a current frame, and detects an update region that a pixel value changed. The coding target region detection and cache update unit replaces an image of an update region in the reference frame with an image in a cache frame, and thereafter, detects a region that a pixel value changed as a coding target region and stores an image of a region that a pixel value did not change for a predetermined past period in the image of the update region in the reference frame before the replacement, into the cache frame as an image of a stable region. The coding unit codes an image of the coding target region and cache information.
摘要:
To provide a motion vector detection device capable of rapidly and accurately detecting a main motion vector from plot data on a computer screen. An edge extraction unit (201) extracts edge points from each of a previous frame and a current frame. A feature point extraction unit (202) extracts, as a feature point, an edge point which is uniquely determined based on a relative positional relationship with another at least one edge point within a frame to which the edge points belong, from among a plurality of extracted edge points. A feature point pair extraction unit (203) extracts, as a feature point pair, a pair of feature points having a common positional relationship, among pairs of a feature point of the previous frame and a feature point of the current frame. A motion vector calculation unit (240) calculates, as a motion vector, a difference between coordinate values of the feature point pair extracted from the previous frame and the current frame.
摘要:
A refractory metal-based alloy material exhibiting high strength and high recrystallization temperature includes a worked material obtained by carburizing, while using a carbon source and coexisted oxygen, a material containing nitride particles of a solute metal dispersed and precipitated in a matrix by multi-step nitriding of a worked alloy material containing one metal selected from Mo, W, and Cr as a matrix and at least one element selected from Ti, Zr, Hf, V, Nb, and Ta as the solute metal, wherein the worked material contains carbon segregated at grain boundaries as a result of the carburizing and oxide particles converted from the nitride particles.