摘要:
A chrominance signal constituting a color image is modulated to generate a modulated chrominance signal. A phase difference between this modulated chrominance signal and a signal corresponding to a particular color is detected. The saturation of the chrominance signal where the phase difference is small is enhanced, thereby making it possible to readily discern a portion of a particular hue from a surrounding portion having a hue different from that hue.
摘要:
In a probe for observing an ultrasonic image, which obtains the ultrasonic image of an object to be observed such as a body cavity by means of an ultrasonic transmitting and receiving means, a mechanical scanning operation of the ultrasonic transmitting and receiving means is performed by an ultrasonic driving means, and thus it is possible to obtain a good diagnosis image with no distortion and no flicker because noises of the driving means can be reduced.Therefore, an ultrasonic endoscope system and an ultrasonic video endoscope system etc. which utilize the probe mentioned above can display a good ultrasonic image and a good optical image.
摘要:
An ultrasonic endoscope apparatus in which an ultrasonic vibrating element radiating an ultrasonic wave to obtain an image of an object to be inspected is rotatably housed in a distal end of an insertion section of the endoscope, and a rotation angle sensing mechanism is also housed in the distal end. The rotation angle sensing mechanism has a magnetic recording section having a magnetization pattern for forming a magnetic field, and a magnetic sensor having at least one magneto-resistive element for sensing the magnetic field. One of the magnetic recording section and the magnetic sensor is rotated integrally with the ultrasonic vibrating element so that a rotation angle of the ultrasonic vibrating element is sensed in a precise manner.
摘要:
An object which is sequentially illuminated by light having wavelengths different for each of several fields is imaged using an X-Y addressed solid state imaging device. The photoelectrically converted signals are read out from the solid state imaging device by the application of drive signals, the read-out being performed without providing a period during which light illumination is suspended. The color mixture caused in accordance with the read-out timing is corrected by using weighting coefficients so as to produce predetermined color video signals.
摘要:
A coherent laser light flux is projected into a cell made of transparent quartz and light scattered from particles suspended in an antigen-antibody reaction liquid contained in the cell is detected by a photomultiplier by means of a collimator. An output electrical signal from the photomultiplier is sampled at different time instances and samplings are supplied to a fast Fourier transformer to derive a plurality of power spectrum densities of fluctuation in intensity of the scattered light. A plurality of power spectrum densities are averaged to generate a mean power spectrum density. An amount of antigen contained in the reaction liquid is measured in accordance with the mean power spectrum density.
摘要:
Equipment to erase the mesh pattern caused by the arrangement of the optical fibers in an endoscope which uses the optical fiber bundle as an image transferring means. This equipment erases the mesh pattern without decreasing the resolution by providing optical low pass filters to cut off the spatial frequency component higher than the resolution which is specified by the arrangement of the optical fibers on both sides of the image transferring means.
摘要:
An ultrasonic imaging apparatus comprises an ultrasonic transducer having two ultrasonic transducer elements which rotatably arranged back to back at the distal portion of an endoscope and a motor provided in the operation section of the endoscope and coupled to the transducer through a drive shaft to rotate the transducer. A transducer drover alternately drives the transducer elements during one rotation of the transducer. A switching circuit alternately switches the echo signals from the transducer elements during one rotation of the transducer. The echo signals of the transducer elements through the switch circuit are signal-processed and supplied to a TV monitor to display a tomographic image.
摘要:
An image pickup apparatus for endoscopes, which makes an image of an object to be observed employing a solid-state image pickup device such as a charge-coupled-device, is provided with an optical filter disposed on the optical path including an illumination optical system for applying illumination light to the object to be observed and an objective optical system for forming an optical image of the object to be observed on said solid-state image pickup device, for correcting the spectral properties of said optical path, thereby permitting a faithful color picture image to be reproduced and a picture image suitable for a kind of the object to be observed to be made.
摘要:
The endoscope equipment of this invention is to display on the monitor screen pictures of different wavelength regions with particular color signals and the synthesized picture and spectral analysis waveforms at particular points by sequentially irradiating the light of a specified wavelength region to a subject, receiving the image of the reflected light with the image pickup element, converting it into electrical signals, conducting spectral characteristic correction on the obtained signals, and then by processing the signals for each wavelength region.