Patent ID: 7471819
Filing Date: 2008-12-30
Classification: G01R

Abstract:
1. A position detecting apparatus for detecting a position of an electronic component, which comprises a terminal, comprising: an image acquiring unit for acquiring an image of said terminal; a terminal area detecting unit for detecting an area of said terminal from said image acquired by said image acquiring unit; an electronic component position detecting unit for detecting a position of said electronic component based on said area of said terminal detected by said terminal area detecting unit and predetermined terminal information of said electronic component; an edge extracting unit for extracting an edge area, which is an area of an edge of said terminal, from a multi-value image which is said image acquired by said image acquiring unit; and a first threshold determining unit for determining a first threshold to be a pixel value at which a number of pixels is greatest among pixels of said edge area, wherein said terminal area detecting unit detects said area of said terminal from said multi-value image based on said first threshold, and wherein said edge extracting unit further comprises; an edge expected value storing unit for storing an edge expected value which is an expected value of the number of pixels of said edge area; a differentiated image generating unit for generating a differentiated image resulting from differentiating said multi-value image; a second threshold determining unit for adding the number of pixels in an order wherein the pixel value becomes greater in regard to said differentiated image and determining a second threshold to be the pixel value when said number of pixels added reaches said edge expected value; and an edge area detecting unit for detecting said edge area from said multi-value image based on said second threshold.