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In view of the limitations revealed in detecting some special types of corners such as chessboard corners (orthogonal X- corners), the authors of this paper improve the SUSAN operator by adding two ring-shaped masks within the SUSAN circular mask. The improved SUSAN operator also includes sub-pixel positioning of the corners by using the center of the gravity about brightness. Moreover, according...
This paper presents an improved median filter for ultrasonic image on time difference method as. Firstly, using the noise characteristics of randomness and incoherence, specially the impulse noise characteristics of short-time and great amplitude, however the characteristics of signal are certainty, continuity and relevance. The algorithm also can adjust the length of window adaptively and ensures...
For the phenomenon of low image contrast usually appearing in scanning electron microscope images, a low contrast microscopic image enhancement algorithm based on multi-technology fusion was proposed, in which the high frequency and low frequency components of images are separated to avoid the increased image noise, while the images was strengthened. Furthermore, the low contrast microscopic image...
This thesis makes an analysis of the problems of the Chinese peeling veneer in the process of veneer production and the importance of the texture in industrial production. In this thesis, the author puts forward the theory of image restoration, and applies this method to the surface of the defects of the knots in the veneer which can be repaired automatically. In this way we can improve the automatic...
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