·Table of Contents ·Methods and Instrumentation | The Develop of Microscope Image Processing SystemFu Ping Wang Peihong (Daqing Manage Office of Oil China 163453)Chen Hexin Ma Yukuan (Jilin University of Technology Changchun China 130025) Contact |
Fig 1: the microscope processing system |
The performance of system are as follows:
Suppose microscope image shot by worktable of precision microscope is f(x, y),0£x, y£511, 0£f(x, y)£255. Because optical field formed by transmitted-light source on CMOS mask is not very uniform, pretreatment is very important.
However if we consider edge detection and filter of noise (due to uneven optical field) at the same time, applying some quick algorithm, the processing time can be reduced. Thus we apply non-linear method for CMOS mask edge detection.
Define input digital image f (x, y) as an set {w_{x, y}} on a pane, here {x, y} is all over z² and its subset. Let working section window be nxn and expressed by A. For two-dimensional median filter, it can be defined on condition {w_{x, y}(x, y)Îz² } as followed :
(1) |
Where med means median.
As we know, the median filter can filter impulse noise and exponential noise in signal. While signal often contains these noise in when CMOS mask is on transmitted-light and during photoelectric transfer process.
Beckers proposed a non-linear Laplace operator - NLLAP, i.e.
NLLAP(x, y)={max(A)-b(x, y)}-{-min(A)+b(x, y)}=max(A)-2b(x, y)+min(A) | (2) |
NLLAP'(x, y)={max(A)-Ox, y}-{-min(A)+ Ox, y }= max(A)-2 Ox, y +min(A) | (3) |
÷ NLLAP'(x, y)÷ £D | (4) |
4.1 Control software
PC computer and vice-controller (consists of MCS-51 single-chip microcomputer) share 62 bus. Communication between them adopts inquiry mode. Fig.2 is shown PC computer control software,,Fig.3 is control software of vice-controller. PC control software accomplish such functions as:
Fig 2: PC computer control software | Fig 3: Sub-controller control software |
4.2 Defect testing software
As shown in fig.4, the software mainly has functions as follows:
Fig 4: Arithmetic testing software |
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