摘要:
Frequency signals of a plurality of different frequency bands are obtained by transforming each of image signals into a multi-resolution space. Each image signal represents one of radiation images of a single object, which have been formed respectively with a plurality of kinds of radiation having different energy distributions and in which different images of at least part of the object are embedded. Signal components of the frequency signals, which are of an identical frequency band and correspond to different image signals, are weighted with weight factors, which are set in accordance with the frequency band, the signal components representing corresponding picture elements in frequency images represented by the frequency signals. The weighted signal components of the frequency signals are subtracted from one another. Difference signals are thus obtained for the plurality of the different frequency bands. An inverse transform is carried out on the difference signals, and an energy subtraction signal is thereby obtained.
摘要:
Radiation images of an object, which have been recorded on recording media and in which different images of at least part of the object are embedded, are read out from the recording media, and a plurality of original image signals, each of which is made up of a series of image signal components, are thereby obtained. The image signal components of the original image signals, which represent corresponding picture elements in the radiation images, are then subtracted from each other, and a difference signal representing an image of a specific structure of the object is thereby obtained. A smoothing process is carried out on an original image signal, and a smoothed image signal is thereby obtained. The image signal components of the original image signal and the difference signal, which represent corresponding picture elements in the images, are weighted such that the weight given to the original image signal may be made larger as the image density represented by the smoothed image signal with respect to a picture element becomes lower. The weighted image signal components are then averaged. A composite image signal obtained from the weighted averaging process is utilized for reproduction of a visible radiation image of the object.
摘要:
A ceramic single layer-coated metal sheet having an excellent decorative property and a high weatherability, which comprises a metal substrate and a transparent ceramic layer formed on the metal substrate by a dry process such as physical vapor deposition or chemical vapor deposition, said transparent ceramic layer having a thickness of 0.05 to 5 .mu.m and a refractive index in the visible region of at least 2.0. A ceramic multiple layer-coated metal sheet having an excellent decorative property and a high weatherability is also disclosed, which further comprises a colored ceramic layer between the substrate and the transparent ceramic layer, the first layer being formed of at least one member selected from the group consisting of nitrides, carbides and carbonitrides of at least one element selected from the group consisting of Ti, Zr, Hf, Cr, Nb and Al and having a thickness of 0.1 to 1 .mu.m.
摘要:
A plurality of radiation images of an object is recorded on a plurality of recording sheets by exposing the recording sheets to radiations which have different energy distributions and have passed through the object. The plurality of radiation images are read out and a plurality of image signals which respectively represent the plurality of radiation images are obtained. A correction formula according to which correction of one or more of the image signals for superposing the radiation images represented by the respective image signals one on another is effected for each picture element is obtained and subtraction processing is effected for each picture element while the aforesaid correction is effected for each picture element according to the correction formula.In other words, the steps of correction, superposition and subtraction are performed consecutively and on a picture element by picture element basis.
摘要:
An image processing apparatus processes diagnostic image data bearing thereon an image through which a disease is to be diagnosed so that a visible image having a quality optimal to diagnose the disease can be obtained. The image processing apparatus includes an image processing condition storage section and an image processing section. Names of various diseases and image processing conditions for the respective diseases are stored in the image processing condition storage section. The diagnostic image data is input into the image processing section. The name of a disease which is to be diagnosed is input into the image processing condition storage section, and the image processing condition corresponding to the disease is input into the image processing section from the image processing condition storage section. The image processing section carries out image processing on the image data according to the image processing condition input thereinto and generates a processed image data. The processed image data is sent to an image reproducing system where a visible image is reproduced on the basis of the processed image data.
摘要:
Digital image signals are detected from radiation images of an object constituted of bones and soft tissues. A subtraction process is carried out with a predetermined parameter on the digital image signals, and a difference signal representing an image of part of the object is obtained. Each of images of a phantom, which has part exhibiting an equivalent radiation absorption coefficient to bones and/or part exhibiting an equivalent radiation absorption coefficient to soft tissues, is read out together with each object image. A value of the parameter is found, with which the image of either part of the phantom becomes erased in a subtraction image of the phantom obtained from subtraction processing. The value of the parameter, which has thus been found, is determined as an optimum value of the parameter. Subtraction processing is then carried out by using the optimum value of the parameter.
摘要:
A push-pull printer includes at least one tractor unit thus is formed to have both a pull function and a push function. Fork-like mounting portions are respectively formed at lower portions of a pair of frames provided at both ends of the tractor unit. A pair of tractor guides are located at each of push and pull feed positions of the printer body. Each guide detachably holds a corresponding fork-like mounting portion. When the tractor is to be used in the push type paper feed mode, the fork-like mounting portions are attached to the tractor guides located at the push feed position. However, for use in the pull type paper feed mode, the fork-like mounting portions are attached to the tractor guides located at the pull feed position. Two such tractors, one providing the pull function and the other the push function, can be used cooperatively.
摘要:
A steering sensor is installed in a vehicle by utilizing a clearance between a steering wheel and a turn signal switch assembly. This makes it possible to provide a steering sensor having a high degree of universality, since the sensor can be simply retrofitted on an existing vehicle not already having such a sensor. The steering sensor can be utilized widely in navigation or other systems requiring such a sensor.
摘要:
A paper feed apparatus includes a plurality of guide ribs formed on a printer top cover disposed above a platen, the guide ribs being aligned along the axial direction of the platen, and a discharge roller is arranged between each pair of the guide ribs. Each discharge roller has its outer peripheral surface slightly extending toward corresponding guide ribs with respect to guide surfaces of these ribs and cooperating with the ribs to hold the printing paper. When the discharge rollers are driven in synchronism with rotation of the platen, the printing sheets are fed at a speed slightly higher than the paper feed speed of the platen. Therefore, the plurality of printing sheets can be simultaneously fed without causing a deviation therebetween.
摘要:
An image processing apparatus such as a monitor system for executing image processing to present a suspicious object effectively. An object detecting unit detects an object contained in an image, an associating unit associates a plurality of objects detected with the object detecting unit, with each other, and an evaluating unit evaluates (e.g., evaluation as being suspicious) an object detected by the object detecting unit, and an association evaluating unit evaluates another object associated by the associating unit with the object evaluated by the evaluating unit, in accordance with the evaluation made by the evaluating unit.