Spencer & Frank
Image recognition system
 A model for a previously defined form is provided in terms of directional features for particular evaluation points and shift vectors from one evaluation point to the next. An input image is represented by density gradients for different directional planes. Shift operations for a counter plane which is used to accumulate values for evaluating the similarity between the image and the model, and add operations in which values from input directional planes as specified by the model are added to the counter plane, are performed repeatedly by parallel processing to find the total match with the model for the form. 
Agency of Industrial Science and Technology
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inventional inventional additional inventional inventional
Hiromitsu Kazuhiko Taiichi
Yamada Yamamoto Saito