Abstract: In a medical diagnostic apparatus utilizing line-of-sight detection, targets are successively presented from different angles to the subject by a target presenting apparatus, eye movement of the subject while the subject is gazing at the target is detected by an eye movement detecting portion, the head movement of the subject is detected by a head movement detecting portion, and in response to the detection outputs, the spatial movement of the line-of-sight, rotation velocity component and translational velocity component of the head movement as well as the velocity component of the eye movement are calculated by a calculating portion, and the results are output to an output portion.

Abstract: In the medical diagnostic apparatus employing line-of-sight detection, eye movement and head movement of a subject are detected by eye movement detecting portion and head movement detecting portion, respectively, and images of the field of view of the subject are picked up by a TV camera. A calculating portion calculates a locus of the line-of-sight, a locus of the eye movement, the locus of the head movement, and vectors of spatial movement of the line-of-sight in response to the detected eye movement and the head movement. An image processing portion reduces the picked up image, a superimposer superimposes the images of the loci, the vector images and the images of the reduced field of view on each other, and the resulting images are displayed on a CRT display.

Abstract: In a motion vector detecting apparatus and an image stabilizer including the motion vector detecting apparatus, the motion vector detecting apparatus includes a motion vector arithmetic unit for calculating a motion vector of an inputted image signal, an integrator for integrating the motion vector, a still decision unit for judging whether or not the inputted image signal represents a still image, a coring value determiner for determining a coring value on the basis of outputs from the integrator and the still decision unit and a coring circuit which controls the coring value on the basis of an output from the coring value determiner so as to perform coring processing on an output of the motion vector arithmetic unit.

Abstract: A fluctuation stabilizing apparatus is provided in which, in a process of integrating a motion vector to obtain an indication of the amount of image fluctuation, the integration characteristic is controlled in accordance with the magnitude of the integration result of the motion vector. A centering controller attenuates the output signal from the integrator in accordance with the magnitude of the output signal from the integrator. A memory interpolation controller shifts the position at which an image signal is read out of an image storing section which includes a memory for temporarily storing the imamge signal in accordance with the output signal of the integrator, so as to cancel the image fluctuation. The centering controller increases the rate of attenuation of the output signal from the integrator when such output signal corresponds to a value as large as one-half of a variable range of the shift of the read out position of the image signal from the image storing section.

Abstract: A correlation computing device includes a higher-order bit elimination circuit which receives a digital input image signal and provides an output signal in which higher-order bits up to 50% have been eliminated as a maximum word length of a digital input image signal. A representative point preservation memory temporarily stores the output signal from the higher-order bit elimination circuit. A correlation determining circuit determines a correlation between a signal stored in the representative point preservation memory and the output signal from the higher-order bit elimination circuit. A minimum-value address decision circuit selects a minimum value of the correlation determined by the correlation determining circuit and determines a motion vector for the digital input image signal.

Abstract: An image motion vector sensor is provided which includes a motion vector sense section in which an input signal of an image plane is subdivided into a plurality of sense domains so as to compute a motion vector of an image in each of the domains, a motion vector decision section for judging validity of the motion vector in each domain so as to decide a motion vector of an entire image plane, a vector reliability density decision section for producing a coefficient which is a function of the density with respect to time of a signal proportional to the number of the domains judged to be valid, and a control section for controlling a magnitude of the motion vector of the entire image plane based on an output from the vector reliability density decision section.

Abstract: A motion vector detector includes a motion vector computing circuit for achieving a computation of a motion vector associated with an input image signal, an integrator circuit for integrating the motion vector, a coring value decision circuit for deciding a coring value based on an output from the integrator circuit, and a coring circuit of which a coring value is controlled by an output from the coring decision circuit and which accomplishes a coring operation on an output from the motion vector computing circuit.

Abstract: In an image pick up apparatus having an image pick up device (1), an amplifier (2), a vertical contour compensation circuit (500), a gamma correction circuit (8), a horizontal contour compensation circuit (9), a color operation circuit (200), and an encoder (10), pixel compensation circuits (100, 100') are provided for reducing modulation components are caused by a color filter during saturation in an image pick up device (1). Horizontal low-pass circuits (7a, 7b) combined with clippers (24a, 24b) are provided in the vertical contour compensation circuit (500) to reduce a modulation components caused by such compensation in the pixel compensation circuits (100, 100').