복층 분해기와 상세구조 보존모델에기반한 다중모드 의료영상 융합
Multimodal Medical Image Fusion Based on Double-Layer Decomposer and Fine Structure Preservation Model
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초록
다중모드 의료영상 융합(MMIF)은 각기 다른 특징들을 나타내는 여러 종류의 모드의 이미지를 풍부한 정보가 포함된 하나의 결과 이미지로통합하는 것이다. 이러한 의료영상 융합은 의사가 환자의 병변을 정확하게 관찰하고 치료하는 것을 도와줄 수 있다. 이러한 목적에 영향을 받아본 논문에서는 복층 분해기 및 미세구조 보존 모델에 기반한 새로운 방법을 제안한다. 첫째, 복층 분해기를 사용하여 소스 이미지를 미세정보보존의 특성을 갖는 에너지 층과 구조적 층으로 분해하였다. 둘째, 구조 텐서 연산자와 max-abs를 결합하여 구조적 층을 융합한다. 에너지층의 융합을 위해 미세구조 보존 모델을 제안하였으며 이미지 융합성능을 크게 향상시킬 수 있었다. 마지막으로, 융합규칙을 통해 형성된 두개의 융합된 하위 이미지를 합산하여 구축하였다. 실험을 통하여 제안된 방법이 현재까지 최첨단 융합 방법들과 비교하여 우수한 성능을 나타내는 것을 검증하였다.
Abstract
Multimodal medical image fusion (MMIF) fuses two images containing different structural details generated in two different modesinto a comprehensive image with saturated information, which can help doctors improve the accuracy of observation and treatment ofpatients' diseases. Therefore, a method based on double-layer decomposer and fine structure preservation model is proposed. Firstly,a double-layer decomposer is applied to decompose the source images into the energy layers and structure layers, which can preservedetails well. Secondly, The structure layer is processed by combining the structure tensor operator (STO) and max-abs. As for the energylayers, a fine structure preservation model is proposed to guide the fusion, further improving the image quality. Finally, the fused imagecan be achieved by performing an addition operation between the two sub-fused images formed through the fusion rules. Experimentsmanifest that our method has excellent performance compared with several typical fusion methods.
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