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A New Approach to Medical Image Fusion Based on the Improved Extended Difference-of-gaussians Combined with the Coati Optimization Algorithm

BIOMEDICAL SIGNAL PROCESSING AND CONTROL(2024)

Grad Univ Sci & Technol | Thuyloi Univ | Vietnam Acad Sci & Technol

Cited 1|Views9
Abstract
The synthesis of medical images plays a pivotal role in image-based disease diagnosis. In recent years, numerous medical image synthesis methods have been proposed. Nevertheless, images generated from the proposed synthesis methods often suffer from shortcomings, including low image quality, reduced brightness and contrast, and loss of vital information. In this paper, we propose a novel approach to tackle the aforementioned challenges in medical image synthesis. Initially, the input images are decomposed into two components: low-frequency and high-frequency components using the Weighted mean curvature filter (WMCF). Subsequently, we propose a synthesis rule for the high-frequency components based on the combination of the Extended difference-of-Gaussians (XDoG) filter, the Structure tensor (ST), and the Local energy (LE) function. Additionally, we employ a novel adaptive synthesis rule, based on the Coati optimization algorithm (COA), to synthesize the low-frequency components. We conducted four experiments using 90 pairs of medical images. The experimental results demonstrate that our proposed method not only effectively enhances image quality, brightness, and contrast but also better preserves crucial details such as boundaries, edges, and the original image’s structure when compared to the most recently published methods.
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Coati optimization algorithm (COA),Extended difference-of-Gaussians (XDoG),Structure tensor (ST),Local energy (LE),Weighted mean curvature filter (WMCF)
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要点】:本文提出了一种基于改进的扩展高斯差分与Coati优化算法的医疗图像融合新方法,旨在提高图像质量、亮度和对比度,同时更好地保留重要信息。

方法】:该方法首先使用加权平均曲率滤波器(WMCF)将输入图像分解为低频和高频组件;然后基于扩展高斯差分(XDoG)滤波器、结构张量(ST)和局部能量(LE)函数提出高频组件的合成规则;最后,采用基于Coati优化算法(COA)的自适应合成规则来合成低频组件。

实验】:本研究进行了四组实验,使用了90对医疗图像。实验结果表明,与最新发布的其他方法相比,该方法能有效提升图像质量、亮度和对比度,并更好地保留边界、边缘和原始图像结构等关键信息。