A pattern preliminary processing system wherein high and low frequency noise other than the pattern signal from a pick-up tube are eliminated by a filtering circuit thereby to "relieve" the pattern against the background and the thus obtained pattern signal is tri-valued into signals of high, medium and low levels by means of a processing circuit having two different threshold values, and then the signal of the medium level is converted into a signal of high or low level with reference to peripheral information thereby to finally bi-value the pattern signal.
A method of monitoring cell culture which comprises digitizing an image of cultured cells inputted to an image processing equipment through a TV camera connected with an observing means and measuring the number and cell proliferation of cultured cells by a processing with using a spatial filter, can treat a large amount of cells in a short time and give a precise number of the cells.
In a method of identifying an object of the type wherein the object is photographed by a television camera, and a portion of the contour line of the object is detected by a photographed picture image, the picture image is scanned by a filter for designating a first group of a predetermined number of continuous picture elements and a second group of a plurality of picture elements spaced from the first group by a distance corresponding to the contour line of the object. Then presence or absence of a contour candidate point at which the brightness changes rapidly in respective picture image groups is detected, and it is identified that the object presents when the contour candidate points are simultaneously detected in respective picture element groups.
A multistage pyramid analyzer, modified to include extrapolation of the input to each stage, together with a pyramid synthesizer, may be used for filling in one or more void defects in an image to provide a natural looking processed image.
A pattern processing system comprising a filtering processor which enhances the edge of a character signal picked up by an image pickup tube, a comparator which binary-codes the character signal on the basis of threshold values of two different levels, a circuit which provides the logical product between outputs from the filtering processor and the comparator, and a filtering processor which subjects the output of the circuit to a filtering processing by the use of a smoothing filter.
In a digital storage system for oscilloscope trace data, in order to obtain precisely the ordinate of an oscilloscope trace at the intersection of a scanning line therewith in a television camera image of the trace, a scan/trace intersection profile signal is compared with a multiplicity of threshold values to generate a set of rectangular pulses of a duration equal to the threshold-override interval, and the pulse for the highest threshold is selected and processed to determine the true intersection ordinate by forming the half-sum of the ordinates of the leading and trailing edges of the pulse. This ordinate and the line scan number are provided as a pair of digital quantities (addresses) for storage in a digital memory.
