TR7500_Series_Software_v29_En - 第256页
Test Research Inc. 234 TR7500 Series User Guid e –Softwa re v.2.9.0 9.2.11 Extra Blob [Extra Blob] is an in spection box to inspect lead open or the scratch of surface . The [Pass Level Settings] are show n in the follow…
Test Research Inc.
TR7500 Series User Guide –Software v.2.9.0 233
Figure 390: ROI Parameter Dialog
[Train] –Set the parameter for training
[Sensitivity] – Using 70 as an example. If the difference of gray level between
neighboring pixels is larger than 30 (100-70) the two pixels will be
regarded as edges.
[Mask Zone] – Using 1 as an example. Next to the edge points, the adjacent 1
pixel is masked as Untest.
[Inspection Parameter] – Set the parameter for inspection. The system only
inspects the area that is in an ROI box and not masked.
[Inspect Sensitivity] – Using 60 as an example. If the difference of gray level
between adjacent pixels is larger than 40 (100-60) the two pixels will be
regarded as edges.
[Tolerance] – Using 5 as an example. If a group size of edges is more than 5
the inspection window will be regarded as failed.
The [Sensitivity] value must be bigger than [Inspect Sensitivity] or it will result in
more false calls.
Test Research Inc.
234 TR7500 Series User Guide –Software v.2.9.0
9.2.11 Extra Blob
[Extra Blob] is an inspection box to inspect lead open or the scratch of surface.
The [Pass Level Settings] are shown in the following figure.
Figure 391: Extra Blob Window Settings
[B/W Threshold] – Input the bright and white threshold
[>Threshold] – Choose this to select the pixels which have a greater gray level
than threshold value.
[<Threshold] – Choose this to select the pixels which have a lower gray level
than the threshold value.
[Both] – Choosing this is to express that you care about the pixel which has
greater or smaller gray level than threshold value and conforms to the following
conditions.
[<Defect Pixel Count<] – The system marks the pixels that are not confirmed
with threshold and regards the adjacent marked pixels as a group. Input the
minimum and maximum. When the size of a group is located in the range, that
group is regarded as a fail. For example, set “50< Defect Pixel Count<500”. This
means that the marked group will be regarded as fail when the group size is
between 50 to 500 pixels.
[Principal axis aspect ratio>] –When the ratio of width to length of a defect group
is larger than the input value, the group will be regarded as a fail. This function
can catch the white line which appears when an IC pin lifts. Input 0 when you do
not want to use this function.
9.2.12 Edge Window
The [Edge Window] is used to check pixels on the edges of inspection windows. The
inspection box parameter setting is shown in the following figure.
Test Research Inc.
TR7500 Series User Guide –Software v.2.9.0 235
Figure 392: Edge Window Dialog
[Edge Threshold] – The difference of adjacent pixels
[Edge Pixel Count Tolerance] – The system will count all the pixels included by the
[Edge Threshold], and show “Fail” if the count is over the [Edge Pixel Count Tolerance]
9.2.13 Color Window
This function calculates the ratio of different colors found in a specific color.
The condition of Pixels’ R, G and B Value within the inspection box
[R-High] >= [R value] > [R-Low]
[G-High] >=
[G value] > [G-Low]
[B-High] >=
[B value] > [B-Low]
To meet the R than G，G than B，B than R conditions
Conditions
If (R ><=G), then ignore R&G relation //default
If (R >=G), then
[R value] >= [G value] + ([R-Low]-[G-Low])
If (R <=G), then
[R value] <= [G value] + ([R-Low)-[G-Low))
If (G ><=B), then don’t care G&B relation //default
If (G>=B), then
[G value] >= [B value] + ([G-Low]-[B-Low])
If (G <=B), then
[G value] <= [B value] + ([G-Low)-[B-Low))
If (B ><=R), then don’t care B&R relation //default
If (B >=R), then
[B value] >= [R value] + ([B-Low]-[R-Low])
If (B <=R), then
[B value] <= [R value] + ([B-Low]-[R-Low))
Areas which are over the [Over Ratio] or under [Under Ratio] are “Fail”.
Figure 393: Color Window Pass Levels