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DIGITAL PHOTOGRAMMETRY FOR CRACKS MONITORING
Abstract
In last yearпїЅs we have seen big progress in digital photogrammetry, advanced quality of the light sensors (bigger resolution, light sensitivity), optics quality, automatic and active image stabilization. These parameters are predetermining photogrammetry for monitoring of the objects. The cracks on the object point to the problems of instability construction and therefore it is important to monitor them. The paper deals with using of photometric mapping by monitoring of cracks activity with using the image processing. The method is nondestructive and available for using exactly for monument objects, especially when it is important to not damage the relic, eventually when the monitoring place is hard to accessible. There are described two methods for evaluation of crack activity. First monitor color changes on crack and second monitor group of identical point displacements. These methods are tested and compared on cracks in church sv. Method. For automated evaluation of crack activity is programed special software.
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