| 摘要 |
PCT No. PCT/FI92/00147 Sec. 371 Date Oct. 26, 1993 Sec. 102(e) Date Oct. 26, 1993 PCT Filed May 8, 1992 PCT Pub. No. WO92/21093 PCT Pub. Date Nov. 26, 1992.A filter for performing dilation and/or erosion operations associated with mathematical morphology using a WxH rectangular structuring element to a two-dimensional matrix of discrete values, the width of the matrix being x and the height being y, includes a horizontal portion for applying the selected operation to a Wx1 local neighbourhood and a vertical portion for applying the selected operation to a 1xH local neighbourhood. According to one aspect of the filer, the portions are connected one after the other and the matrix elements are applied serially to the first portion, the output of one portion being connected to the input of the other portion. Each of the above-mentioned portions includes a multiplicity of delay devices, each device providing an equal delay, and a multiplicity of comparing devices for comparing two input values. Each comparing device can produce a selected one of the lesser or greater of the input values at their output so as to permit erosion and dilation operations, respectively. According to another aspect of the invention, each portion includes a set of identical operator elements connected one after another, the horizontal portion having W such operator elements while the vertical portion having H such operator elements.
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