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In the molten rock deformation experiments images often shaped by exposure of different photos stitched together, for the molten maldistribution problem of the mosaic effect, this paper presents a method based on quadratic threshold determination to balance, It can be seen, compared with the nonlinear dynamic range adjustment method, this method can better solve the problem of mosaic effect.
The non-uniform illumination and irregularities in the surface of asphalt pavement make the conventional image enhancement and segmentation algorithm fail. In order to address these problems, we present an illumination invariant image enhancement and segmentation algorithm, which are crucial for feature extraction and classification of pavement crack image. The experimental results based on measured...
According to the characteristic that uniform probability distribution of gray levels maximizes the Shannon entropy, we define a new objective function of simple form and definite meaning to select threshold. The threshold which is selected by the new objective function is the same as the one that one-dimensional entropy-thresholding. The character will be proved theoretically and validated experimentally...
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