VI User Manual - 第219页
Tools library Vision 2007 4.10 User Manua l Rev 01 7 - 57 7.9.4.2 Contrast This algorithm can be used when you have a di ff erence of le ad / joint contrast b e tween lifted and joined lead. Principle This algorithm meas…
Tools library
7 - 56 Vision 2007 4.10 User Manual Rev 01
Concrete case
1. Go in Expert tab.
2. In Peak threshold (level of gray) area enter the threshold value to apply and the
peak to use (Y max or Y min).
3. Fill Limits field to ignore a part of the profile.
4. Define the acceptable limits (Length [µm] field).
In this case, for a lifted lead, result of
Peak threshold al-
gorithm is smaller compared with a joined leads.
Profiler
™
in Custom
Tools library
Vision 2007 4.10 User Manual Rev 01 7 - 57
7.9.4.2 Contrast
This algorithm can be used when you have a difference of lead / joint contrast between
lifted and joined lead.
Principle
This algorithm measures the amplitude of
the gradient peak. This measure can corre-
spond, depending on the profile area posi-
tion, to the contrast of the outline.
Concrete case
Go in Expert tab.
In
Contrast
area enter the minimum and maximum value of distance (the acceptable limits).
For a lack of joint, result of contrast algorithm is bigger
compared with correct joint.
Max peak
Min peak
Max peak
Min peak
Profiler
™
in Custom
Tools library
7 - 58 Vision 2007 4.10 User Manual Rev 01
7.9.4.3 3D analysis
This algorithm can be used on a lot of case because it is very flexible.
Principle
This algorithm is an analysis on the 3 di-
mensions of the gradient (X, Y and gray
level). It measures the area under the ab-
solute value of the gradient. You can de-
fine 2 zones that will be ignored on the
calculation of the area.
Concrete case
Go in Expert tab.
In
3D analyze area (A), fill the Limits field to ignore a part of the gradient and define the
acceptable limits (
Area [µm²] field).
Press
Absolute value button (B) to see the absolute value of the gradient.
In this case, for a lifted lead, result of
3D Analysis algorithm
is bigger compared with a joined leads.
Considered areaIgnored area Ignored area
Limits
Mesured area
Considered areaIgnored area Ignored area
Limits
Mesured area
A
B
Profiler
™
in Custom