Image edge extraction method based on blocked Kalman filtering

A Kalman filter and image edge technology, applied in image enhancement, image analysis, image data processing, etc.

Active Publication Date: 2013-09-18
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

Among them, the block Kalman filtering method is a very effective solution, which can quickly restore the degraded image, but in the filtering iteration process, the initial value of the filter is a fixed value that has nothing to do with the image information, which is a problem that needs to be overcome. disadvantages

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  • Image edge extraction method based on blocked Kalman filtering
  • Image edge extraction method based on blocked Kalman filtering
  • Image edge extraction method based on blocked Kalman filtering

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Embodiment Construction

[0021] The present invention will be described in further detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0022] Such as figure 1 As shown, it is a flow chart of the image edge extraction method in this specific embodiment, including the following steps:

[0023] U1) The original image to be processed is processed hierarchically according to the pyramid structure.

[0024] In this step, first input the image to be processed. Secondly, the hierarchical representation of the pyramid of the image is obtained according to certain rules, in which each level is a lower-resolution representation of the lower level.

[0025] Specifically, the underlying image is the original image. In other layers of the pyramid structure, each pixel is obtained by calculating the spatial average value of the corresponding pixel in the image of the next level. The multi-level pyramid we have chosen has the characteristic that the spatial res...

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Abstract

The invention discloses an image edge extraction method based on blocked Kalman filtering. The image edge extraction method includes the following steps that: (1) original images to be processed are subjected to hierarchical processing according to a pyramid structure; (2) the hierarchical images are subjected to 2D blocked Kalman filtering respectively, the former stage filtering result serves as the original value of the next stage filtering process, and the next stage filtering process includes Kalman filtering for images subjected to full-resolution image interpolation already; and (3) the filtered images are subjected to image edge detection respectively through four operators, namely Sobel, Canny, Log and Zero Cross, and image edge images obtained by the four operators are subjected to OR operation synthesis to obtain the final image edge image. According to the image edge extraction method, hierarchical processing and interpolation calculating are adopted so that the filtering effect of the filtering stage is effectively improved and the operand signal to noise ratio of image edge extraction is improved; and the advantages of the four classical image edge detection operators are fully utilized so that the image edge detection quality is improved.

Description

【Technical field】 [0001] The invention belongs to the field of computer image processing, and in particular relates to an image edge extraction technology based on block Kalman (Kalman) filtering. 【Background technique】 [0002] With the continuous development of modern industry and national economy, people need to deal with more and more multivariable systems and multidimensional signals, multidimensional digital filters, multidimensional digital image comprehensive processing, etc., and most of them are in the form of 2-D (two-dimensional ) discrete system model, all these applications provide a profound engineering physics background for 2‐D system theory, making 2‐D system theory a discipline branch with strong vitality and development prospects in control theory. [0003] Due to the wide application of 2-D dynamic systems in image processing, network synthesis, power systems, time-delay control systems, communication, seismic and geophysical data processing, etc., the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00
Inventor 王好谦刘翠张颖
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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