Abstract: In a motion-compensated picture signal interpolation apparatus comprising switched memories (SMX,LM) for furnishing motion-compensated pixel values corresponding to at least two motion vectors (.+-.d, 0), the motion-compensated pixel values are processed by an ordered statistical filter (MED).

Abstract: An electronic still camera includes a plurality of image pickup elements having color filters of a plurality of colors; a color separation unit for separating outputs from the image pickup elements into each color signal; an interpolation unit for receiving an output from the color separation unit and interpolating missing part of each color image data; an orthogonal transformation unit for dividing respective color image data interpolated by the interpolation unit into a plurality of blocks and performing orthogonal transformation, a coding unit for coding an output from the orthogonal transformation unit; and a storage unit for storing an output from the coding unit.

Abstract: A method of eliminating interference signals from video signals by motion-adaptive filtering, in which method first a motion signal-dependent transversal filtering and subsequently a median filtering is performed.

Abstract: A method of suppressing grain noise resulting from ultrasonic inspection of an object, including ultrasonically scanning an object and detecting waveform signals therefrom, determining, from the signals, data values which define a 3D waveform data set U(x,y,t) having both spatial (x,y) and temporal (t) ultrasonic data values from the scanned object, converting the 3D waveform data set into a 3D filtered waveform data set V(x,y,t) by performing a 3D filtering operation thereon, wherein for each data value in the 3D waveform data set U(x,y,t), a filtered data value is obtained by taking into account data values which are adjacent thereto both spatially and temporally, thereby reducing grain noise relative to flaw signals to enable a high probability of flaw detection and a low probability of false flaw indications.

Abstract: The present invention is a process for reducing the noise of a video signal (S1), in particular when reproducing a video signal stored on a video recorder, in which a window is defined around every signal value P (0,0,0) as an output signal value. A mean deviation (.sigma.) of the signal values in the window is established from the output signal values P (0,0,0), and an averaging of the output signal value is carried out with those neighboring signal values in the window which lie within limit values (So, Su) for the deviation from the output signal value P (0,0,0) dependent on the established mean deviation (.sigma.). The method is improved in its effectiveness by at least one threshold value (a1, a2) being fixed for the mean deviation (.sigma.=a/2), by the limit values (So, Su) for a mean deviation lying below the threshold value (a1, a2) being set with values (b) dependent on the established mean deviation (.sigma.) and by the limit values (So, Su) for a mean deviation (.sigma.

Abstract: A picture image photographing apparatus is comprised of a lens system for imaging data on an original paper, a plurality of line sensors for inputting optical data imaged by the lens system and each comprised of a plurality of imaging elements for converting the optical signals on the line sensors into electrical signals, a plurality of output portions for outputting data signals which are converted from the electrical signals and have a predetermined voltage, and a signal processing portion for outputting a mean value as a final information with respect to a same portion of a same line on the paper, which is obtained from a plurality of the data signals supplied from the output portions. By the above components, it is possible to perform a high-speed processing for the read-out image and to extremely improve a signal to noise (SN) ratio due to optical shot noise.

Abstract: A noise eliminating circuit comprising a noise eliminating filter for moving image part to be used when an input image is of the moving image part, a noise eliminating filter for stationary image part to be used when the input image is of the station image part, these filters being adaptively selected between according to a motion of the input image, a detecting circuit for detecting the motion of the input image, and a selecting circuit for selecting between outputs of these filters based on an output of the detecting circuit, wherein the noise eliminating circuit for stationary image part outputs an average input image of number of stationary frames n to be entered. The novel constitution effectively suppresses a noise introduced in a moving image or a stationary image, generating an output signal with a good picture quality.

Abstract: A device for reducing noise includes a first delay circuit for producing a first delay signal which is spacewise continuous to a current signal, a second delay circuit for producing a second delay signal which is timewise continuous to the current signal, first and second signal coincidence judging circuits for comparing the current signal with the first and second delay signals at a smapling period and judging whether or not difference in level between the current signal and the first and second delay signals is below a predetermined value continuously for a predetermined number of samples, and a conditional averaging circuit for providing, when it has been judged by the first or second signal coincidence judging circuit that the condition that difference in level between the current signal and the first or second delay signals is below the predetermined value continuously for the predetermined number of samples has been satisfied, an output signal which is an average value of one or both of the delay signal

Abstract: A method of measuring the noise in an active video image. During a given processing period, for each pixel of a video image considered to be stationary, the difference f.sub.d between the video signal corresponding to this pixel and the video signal corresponding t the pixel at the same spatial position in a preceding image is calculated. The square of the absolute value of the difference is calculated so as to obtain a value .vertline.f.sub.d .vertline..sup.2, and the value .vertline.f.sub.d .vertline..sup.2 is added to previously obtained values so as to form a sum value .SIGMA..vertline.f.sub.d .vertline..sup.2. The above operations are repeated until the number of pixels processed is equal to a given threshold value N.sub.0, or until the end of the processing period. At the end of the processing period, if the number of pixels processed is equal to the threshold value, the value .SIGMA..vertline.f.sub.d .vertline..sup.2 is used to determine a reference point giving a new noise-reduction coefficient k.sub.

Abstract: A frame image signal which is output cyclically is converted to a digital signal and input to a first multiplier in a digital filter. The first multiplier multiplies a digital image signal Y.sub.i of each frame by (1-a), and supplies the product (1-a).multidot.Y.sub.i to a first input terminal of an adder. The coefficient a is a negative coefficient whose absolute value is not more than 1, so that (1-a) becomes a positive coefficient of not less than 1. An output of the adder serves as an output Y.sub.i ' of the digital filter from which the residual image has been erased, and is supplied to a subsequent unit, e.g., a display unit (not shown) connected to the output of the adder. The output Y.sub.i ' of the adder is also supplied to a frame memory and is delayed by one frame period. Therefore, an output Y.sub.i-1 ' of the frame memory is a one-frame preceding image output. The signal Y.sub.i-1 ' is input to a second multiplier and is multiplied by the coefficient a.