Panasonic LightPix AE20 User Manual page 54

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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

Template

detection

candidates

When used

When NOT

used

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

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