Multi-focus image edge detection method based on space relative altitude information

A multi-focus image, relative height technology, applied in image enhancement, image data processing, instruments, etc.

Active Publication Date: 2014-07-23
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

[0004] At present, the existing image edge detection methods are often proposed for two-dimensional plane images. In the fields of metallographic analysis and medical cell image analysis, the collected image information can only be two-dimensional images due to the characteristics of the target object. information, so in these fields, the edge detection problem can only be solved on two-dimensional planar images

Method used

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  • Multi-focus image edge detection method based on space relative altitude information
  • Multi-focus image edge detection method based on space relative altitude information
  • Multi-focus image edge detection method based on space relative altitude information

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Embodiment 1

[0056] The imaging device in the image acquisition system of this embodiment is a Canon 550D digital camera 1, and its effective pixels are 18 million. The light source used is an LED light source 3, and the target sample 4 is a rock particle. The specific operation steps are as follows:

[0057] Step 1: Follow the figure 1 The structure diagram of the multi-focus sequence image acquisition system shown in the figure arranges all the components, puts the target sample 4 on the stage 5, uses the digital camera 1 to focus on each layer of the target sample 4, and then adjusts the digital camera lens 2 from top to bottom , to obtain clear focused images of the target sample 4 at different heights from top to bottom, that is, to obtain the multi-focus sequence images in the vertical direction of the target sample 4, and at the same time, the multi-focus sequence images are numbered as (a) according to the order of acquisition , (b), (c), (d)..., get a total of 20 images, select 4 ...

Embodiment 2

[0096] In this embodiment, the structure of the acquisition system for acquiring multi-focus sequence images by using the imaging equipment of microscope 6 and camera 8 is as follows: Figure 8 As shown, the light source used is an LED light source 3, and the target sample 4 is rock particles.

[0097] Step 1, follow Figure 8The structural diagram of the multi-focus sequence image acquisition system shown in the figure arranges all components, and the target sample 4 is placed on the stage 5. According to the method for acquiring multi-focus sequence images of the present invention, each layer of the target sample 4 is focused with a microscope 6, Then adjust the microscope objective lens 7 from top to bottom to obtain a clear focused image of the target sample 4 from top to bottom at each different height level, that is, to obtain a clear focused image of rock particles at each height level from top to bottom, so as to obtain the target sample at each level. For the multi-f...

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Abstract

The invention relates to a multi-focus image edge detection method based on space relative altitude information, belonging to the field of digital image acquisition and identification. The multi-focus image edge detection method comprises the steps of: obtaining a multi-focus sequence image of a target sample by using an image acquisition system; carrying out image registration preprocessing on the multi-focus sequence image by using a cross-correlation information-based image frequency domain registration method; fusing the registered image by using a wavelet transform-based image fusion algorithm and extracting a space relative altitude information image by using a focus depth measuring method; processing the space relative altitude information image by using an altitude consistency constraint method for eliminating noise; carrying out edge detection on a target region and a background region of the processed space relative altitude information image; and identifying and expanding a local maximum region of a sub target in the target region of the detected space relative altitude information image for completing the edge detection of the space relative altitude information image so that the edge detection of the multi-focus image is realized.

Description

technical field [0001] The invention relates to a digital image processing technology, in particular to a multi-focus image edge detection method in digital image processing based on spatial relative height information, belonging to the field of digital image acquisition and recognition. Background technique [0002] Digital image edge detection is a classic problem in the field of digital image processing. Its core idea is to detect local features that appear in a discontinuous form in digital images. These local features can be sudden grayscale, color, or texture. The ultimate goal is to separate the background area in the digital image from the target area and different sub-target areas in the target area, and the detected image edge is also the dividing line of different sub-target areas in the image. [0003] When solving the edge detection of rock particles in petroleum geological images, the edge detection of metal tissue particles in metallographic image analysis, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/50
Inventor 滕奇志何小海汪杰方莹莹吴拥王正勇易云
Owner SICHUAN UNIV
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