FLASH : Fast Line Analyser by local threSHolding

Automatic detection

How do we find a point which belongs potentially to a crack ?
We apply the mask above for each pixel. There are 8 configurations and 20 orientations can be computed.

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Search of a possible mask configuration on the central pixel

Application pixel by pixel

A found configuration...

...the pixel answers in horizontal orientation

The white pixels answers to a configuration

The viewing of cracks allows us to navigate freely in the image and zoom in images with a high resolution.

Examples of detected cracks

Concrete database

• Download concrete database V1.0 (201 images)