Optimization for Computer Vision by Marco Alexander Treiber

Author:Marco Alexander Treiber
Language: eng
Format: epub, pdf
Publisher: Springer London, London

2.What criteria can be defined for matching?

For the first question, two different strategies are to be mentioned: Predefined filters: If we know what we search for, e.g., the outer shape of the object parts, we can incorporate these shapes in the design of special filters, which are applied to the image and yield high responses at positions where the image content fits to the filter design. If a filter is shifted pixel-by-pixel over the search area and the filter response is calculated at each position, these responses can be accumulated in a two-dimensional matching function. The local maxima of the matching function being above a certain threshold indicate occurrences of the searched object part and can be used as points to be matched. This proceeding is well suited for industrial object detection (or inspection) applications, where the object to be searched is known in advance. Hence, the filter can, e.g., be derived from CAD data.

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