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Speckle noise is a common undesired phenomena in all coherent imaging systems and it affects the tasks of human interpretation and automated image analysis. This paper presents a novel anisotropic method for speckle reducing. A constrained optimal problem is considered to minimize total variation of speckle image. By using dynamical scheme, we obtain a new anisotropic diffusion filter. Compared to...
A multi-sale morphological filtering method for preserving the details of images (MMFPD) was applied by adding the multi-scale top-hat transformation and bottom-hat transformation to the conventional multi-sale morphological opening and closing filtering. The two added transforms were used to extract and smooth the features which are smaller than the current scale. It was found that the smaller features...
A new type of digital filter for removing random noise in images is proposed using interactive evolutionary computing. This filter is realized as combination of several nonlinear digital filters, such as an epsiv-filter and a conditional median filter. Interactive evolutionary computing is adopted in order to optimize the parameters in the nonlinear filters, considering the subjective assessment by...
A new image filter based on rough sets theory and multi-directions difference image is proposed for impulsive noise to overcome the drawback of median filter and its extends. The conceptions, the number of directional signs and the number of directional extremum signs, are defined to describe the smoothness and noisiness of the pixels according to the multi-directions difference image. An image is...
One of the backbones in electronic manufacturing industry is the printed circuit board (PCB). The recent rapid growth in electronics devices, results escalating in the production number of the PCBs. For electronic equipment and appliances which are PCB based, new generations of PCB's are produced to suit the requirements of new products. This development can lead to waste and inefficiency when perfectly...
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