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A new method for removal of wide density salt and pepper noise in image is proposed. Every pixel in a noise corrupted image is classified to which it is a noise pixel or noise-free pixel. A noise pixel should be modified by a filter. On the contrary, noise-free pixel is kept unchanged. If noise-free pixel is detected as noise pixel wrongly, the restored image will be blurred. The difference between...
For the complex environment of coal mine, there are many noises and random errors, which make larger location error in coal mine, lead to the difficulty of finding the precise positions of staff. This paper presented an improved location algorithm based on time average, which was the characteristics of lower computational complexity, less communication cost and stronger anti-interference ability....
A new restoration algorithm aimed at local motion-blur in a complex background is proposed in this paper. First, the local blur part of the image is extracted from the complex background and it is pasted on a bottom of monochromatic background. Then image restoration is done on the blur part in the monochromatic background which is easy to be restored. Finally, the restored local image is pasted back...
A clock generation technique for reducing the clock-jitter sensitivity of Switched current (SI) Return-to-Zero (RZ) DAC in CT ΣΔ modulators is presented in this paper. While realizing the clock-jitter insensitivity, this technique ensures that the feedback period can be utilized more efficiently so that the amplitude of feedback current can be reduced. The proposed technique employs simple digital...
The principle of Phase-Inversion Symmetric method (PISM ) in time-domain based on noise correlation is presented, and its anti-narrowband noise interference ability is analyzed. The simulation models of PISM in time-domain and narrowband noise interference are designed. The band-limited Gaussian white noise and narrowband noise interference model is applied to PISM in time-domain to study anti-interference...
A method based on the particle filter was proposed to resolve the problem of target track in looking forward sonar image sequences. The theory of particle filter was illustrated, and it was used to estimate the situation of objects in sonar images. Considering the relation between the process noise and the steady results, process noise was set by the adaptive strategy. At last, the results of experiments...
An enhanced image segmentation of IR thermal images based on two-dimensional classes square error is discussed. Aimed at the low distinguish ability, low SNR of IR thermal images and very high computation cost of image segmentation of two-dimensional classes square error, a new image segmentation algorithm based on chaos-genetic algorithms is proposed. The experimentspsila results show that, because...
Edge detection of images is a classical problem in computer vision and image processing. The key of edge detection is the choice of threshold; the choice of threshold directly determines the results of edge detection. How to automatically determine an optimal threshold is one of difficult points of edge detection. In this paper, Sobel edge detection operator and its improved algorithm are first discussed...
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