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Image Edge Extraction Method Based on Block Kalman Filter

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

Active Publication Date: 2016-03-23
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 Block Kalman Filter
  • Image Edge Extraction Method Based on Block Kalman Filter
  • Image Edge Extraction Method Based on Block Kalman Filter

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Embodiment Construction

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

[0022] Such as figure 1 As shown, the flowchart of the image edge extraction method in this specific embodiment includes the following steps:

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

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

[0025] Specifically, the bottom-level image is the original image. In the other layers of the pyramid structure, each pixel is obtained by calculating the spatial average of the corresponding pixel of the next level image. The multi-level pyramid we selected has the following characteristics: each time the pyramid increases by one level, the spatial resolution is hal...

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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 specifically relates to an image edge extraction technology based on block Kalman filtering. 【Background technique】 [0002] With the continuous development of modern industry and national economy, people need to deal with more and more multi-variable systems and multi-dimensional signals, multi-dimensional digital filters, multi-dimensional digital image comprehensive processing, etc., and most of them are expressed as 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 branch of control theory with strong vitality and development prospects. [0003] Due to the wide application of 2-D dynamic systems in image processing, network synthesis, power systems, delay control systems, communications, seismic and geophysical data processing, etc., the research of 2-D dynamic systems...

Claims

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Application Information

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Patent Type & Authority Patents(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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