Panasonic LightPix AE20, User Manual

Page: 54 / 151

Detailed conditions: Number of detection candidates
Number of detection candidates
At the first and second steps, if you set the number of detection candidates when there are multiple images
having more than the specified degree of similarity, you can detect the images of the specified number. The
detected multiple images are called the “number of detection candidates”. If you do not set the number of
detection candidates, only one candidate is detected at the first step. If multiple images are detected at the
first step, the unit searches for each image at the second step and continues the same operation until the
final step.
It is recommended that you set the number of detection candidates in the following cases:
This feature would be helpful if there is an object in the same color as the object you want to detect, or the
same pattern exist in the background as the part you want to detect.
For a searching for a rough image, the degree of similarity for these objects or background may become
reversely higher than or equal to the target object or part. The unit detects only the image having the highest
degree of similarity among the images having the degree of similarity more than the specified. Therefore, if
the number of detection candidates are not set just like the following NG judgement, the unit detects an
unwanted object or pattern at the first step, the degree of similarity gets lower after the unit keeps searching
only the area up to the final step, which may result in the failure of the target image detection.
Example:
Setting of
detection
candidates Template The first and steps
(The figure shown below is
the original image. The unit
actually searches in the
rough image.)
The final step Image
detection
judgement
When used OK
When NOT
used
NG
47