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A filtering device for carrying out a filtering process in a space domain of image data derived from an external visual image input means and then delivering control information to a controlled driving device with the filtering device containing fundamental operator generation device for generating

A filtering device for carrying out a filtering process in a space domain of image data derived from an external visual image input means and then delivering control information to a controlled driving device with the filtering device containing fundamental operator generation device for generating fundamental operators within the same fundamental operator series, and a filtering processing device for carrying out a convolution of a fundamental operator with an image data array and conducting a sequential series of such convolutions with varying input data based upon data detected at the output of the filter processing, so that the sequential convolution attains an effect equivalent to that attained by the direct convolution of the initial image data array with an expanded operator.

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A filtering device for effecting a filtering process in a space-domain of initial image data derived from an external visual image input source, said filtering device comprising: (a) fundamental operator generation means for generating fundamental operators within at least one fundamental operator s

A filtering device for effecting a filtering process in a space-domain of initial image data derived from an external visual image input source, said filtering device comprising: (a) fundamental operator generation means for generating fundamental operators within at least one fundamental operator series; (b) filter processing means for convolving an initial input image data array and successive input image data arrays with respective fundamental operators to produce successive output image data arrays representative of the convolved input image data arrays; (c) means for determining whether each said successive output image data array satisfies at least one predetermined condition; and (d) means for selectively sending one of said output image data arrays to a post-filter processing device only when each said predetermined condition is satisfied by said one output image data array.