In the phase of image pretreatment , the main jobs of this system includes dot operation , image swell , positive chiasma transform , edge extraction and edge swell , outline track , etc . because the visual system itself is a neural system , systematizer designed in the paper adopts bp neural network to accomplish computer image identification , the system has some advantages over the traditional one , but with the extensive application of bp neural network , the problems existing in bp neural network come forth increasingly 在系統(tǒng)軟件設(shè)計(jì)部分中,首先是對(duì)所選零件進(jìn)行模式識(shí)別,包括圖像預(yù)處理、特征提取和分類(lèi)器設(shè)計(jì)三個(gè)階段,其中在圖像預(yù)處理階段本系統(tǒng)主要做的工作有:點(diǎn)運(yùn)算、圖像增強(qiáng)、正交變換、邊緣提取和邊緣增強(qiáng)、輪廓跟蹤等。由于視覺(jué)系統(tǒng)本身就是一個(gè)神經(jīng)系統(tǒng),故本文所設(shè)計(jì)的分類(lèi)器采用bp神經(jīng)網(wǎng)絡(luò),其具有一些傳統(tǒng)技術(shù)所沒(méi)有的優(yōu)點(diǎn)。