Density Averaging; Relative Search - Omron F150-3 - MANUAL 2 Operation Manual

Measurement Methods
Note Since inspection is performed by variations in density, if a
1-2-7

Density Averaging

Example: Existence of Measurement Object
Measurement object in
measurement region
Average density
within measurement
region: 30
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Relative Search

10
design or mark is contained inside the measurement
region, this will be detected as a defect. When inspecting
an area containing a design or mark, use a gray search or
a precise search. The image will be compared with the
model, and the level of similarity (the correlation) will be
obtained.
Use density averaging to perform measurement based on dif-
ferences in the average brightness. The density averaging
function obtains the density for each pixel (between 0 and
255), obtains the average, and performs measurement on this
value.
Density averaging can be used to verify the existence of a
measurement object.
Use this method to obtain the positions of markings, holes,
and other features, and to judge whether these features are
within the acceptable range. This method is based on relative
position, so models must be registered in two positions: a
measurement position and a reference position.
No measurement object in
measurement region
Average density
within measurement
region: 200
Section 1-2