A Multifocus Image Fusion Method Using Morphological and Free Boundary Condition Active Contour Models
A technology of active contour model and multi-focus image, which is applied in the field of mathematical morphology and image fusion, can solve the problems of ineffective image fusion, low contrast of fused image, and block effect edge, etc., and achieve broad market prospects, application value and effect Accurate and stable effect
Active Publication Date: 2017-07-28
BEIHANG UNIV
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However, the existing image fusion methods cannot well fuse the source images with different focusing distances together, and the generated fused images have low contrast, block effects or edge blurring, etc.
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[0055] In order to better understand the technical solutions of the present invention, the embodiments of the present invention are further described below with reference to the accompanying drawings. The principle and flow chart of the present invention are as follows figure 1 As shown, the specific implementation details of the present invention are as follows:
[0056] Step 1: Construct the initial image definition distribution map OFM according to the image gradient i (x,y).
[0057] The gradient feature of the image can well characterize the sharpness of the image. For a certain area in a grayscale image, the grayscale change of the focused area is more severe than that of the out-of-focus area. The grayscale change is reflected in the gradient feature, so the gradient feature of the image can be used to characterize the sharpness of the image. Ideally, the gradient of each pixel location in the in-focus region of each source image is larger than the gradient of the c...
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The invention provides a multi-focus image fusion method using morphology and a free boundary condition active contour model. The method comprises the following steps: (1), constructing an initial definition distribution diagram of an image by using a gradient feature; (2), carrying out calculation by using the initial definition distribution diagram to obtain a rough definition distribution diagram ad then determining a final definition distribution diagram; (3), carrying out processing on the final definition distribution diagram based on small-area removing operation of the morphology and open-close operation of the morphology to obtain an initial fusion decision image; (4), extracting a boundary, serving as an initial value of a free boundary condition active contour model, between a focusing area and an out-of-focus area from the initial fusion decision image; (5), obtaining a boundary image based on the free boundary condition active contour model and obtaining a final fusion decision image according to the boundary image and the initial fusion decision image; and (6), on the basis of a decision image of multi-focus image fusion and a set fusion rule, generating a final fusion image with all clear parts. THE method can be widely applied to various image processing application systems.
Description
technical field [0001] The invention relates to a multi-focus image fusion method using morphology and free boundary condition active contour model, belonging to the field of digital image processing, and mainly relates to mathematical morphology and image fusion technology. Image fusion can effectively improve the utilization of image information, and lay a good foundation for image understanding and analysis. Therefore, multi-focus image fusion has broad application prospects in various image-based application systems. Background technique [0002] Multi-focus image fusion technology is an important technique to obtain a composite image in which all objects are in focus. Due to the limited focusing range of the camera lens, it is difficult to bring everything within the lens into focus. Therefore, multi-focus fusion technology is required to clearly present the scenes at different distances in the same scene in one image, so that the image information can be used more ef...
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IPC IPC(8): G06T5/50
Inventor 白相志刘妙明
Owner BEIHANG UNIV