Image Inspection Apparatus, Image Inspection Method, And Computer Program
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United States of America Patent
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Issued Date -
Aug 16, 2012
app pub date -
Jan 18, 2012
filing date -
Feb 10, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides an image inspection apparatus and a method which remove noise even when there is a change in brightness of a multi-valued image, and which inspect a defect, and relates to a computer program. A multi-valued image is acquired, and a reference intensity value based on intensity information for the image is calculated. A difference for each pixel between the intensity value and the reference intensity value is calculated, and a threshold value to track and change in response to a change in the reference intensity value is set and stored. Pixels that have a calculated difference that is larger than the threshold value is extracted, and an aggregate body of pixels based on a connectivity of the intensity value of the extracted pixels is specified, and a characteristic amount using the difference is calculated. A defect is discriminated based on the calculated characteristic amount.
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