Denso RC5 Specifications download pdf (Page 149)

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Chapter 5 Vision Control

5-9

5.1.1.9 Search

Search moves the standard image data (search model) previously stored in the

searching range (within the window range) of the measuring object image, and

finds the matching position with the search model.

Search model Window

Fig. 5-16 Search

In the µVision board, standard image data is called a search model.

It is comprised of image data and the reference coordinates (OX, OY).

Fig. 5-17 Search Model

The value that an expressed degree of search model corresponds to the

measuring object image is called a correspondence degree. If the

correspondence value larger than the designated one is obtained, the system

can obtain the coordinates of the correspondence position of the search model

and the measuring object image. The detection accuracy of the coordinates is

1 (the minimum unit of the pixel). You can obtain results with an accuracy of

less than 1 pixel using sub pixels. If you execute measurement with sub pixels,

it takes longer time to measure than to measuring with pixels.

Search model

Image data

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Denso RC5 Specifications Page 149

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