Seiko Instruments Inc

Yuko Murayama

Toshiyuki Yamada

Shuichi Wakabayashi

Tetsumi Kawamoto

A circuit for processing a dilation conversion and erosion conversion of a digital image data to extract the feature of the image. A range N.times.N of the image data is processed by a simple circuit construction which a horizontal row extraction circuit holding N data and a conversion stage for converting N data are disposed in a crisscross arrangement.

Dilation/erosion conversion circuit

A circuit for processing a maximum value conversion and a minimum value conversion of a digital image data to extract the feature of the image. A range N.times.N of the image data is processed by a simple circuit construction which comprises a horizontal row maximum value selection circuit for selecting the maximum value along N data and N numbers of maximum value selection circuits for comparing N vertical column data with the output data of the horizontal row maximum value selection circuit.

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Tokyo, Japan

Yuko Murayama