Based on CCD-image and image processing technology
a measuring system for microchannel's sizes was developed. The non-contact measuring method for geometrical sizes was presented by means of the digital image manipulation technology
including image preprocessing
image binary-conversion
boundary encoding and calculation of microchannel's geometrical sizes
etc. The measured results show that the maximum measuring error by proposed method is 2 μm
which accords with the results measured by a stylus profiler and a universal measuring microscope. The reasons to cause the error were analyzed
results indicate that this method is correct
feasible
simple to use
and can avoid the errors often made by stylus in deeper structures.
关键词
Keywords
references
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