标题：Efficient OCT Image Enhancement Based on Collaborative Shock Filtering
作者：Liu, Guohua; Wang, Ziyu; Mu, Guoying; Li, Peijin
作者机构：[Liu, Guohua] Shandong Univ, Dept Ophthalmol, Qilu Childrens Hosp, Jinan 250022, Shandong, Peoples R China.; [Wang, Ziyu] Yidu Cent Hosp Weifang, De 更多
通讯作者地址：[Mu, GY]Shandong Prov Hosp, Dept Ophthalmol, Jinan 250021, Shandong, Peoples R China.
来源：JOURNAL OF HEALTHCARE ENGINEERING
摘要：Efficient enhancement of noisy optical coherence tomography (OCT) images is a key task for interpreting them correctly. In this paper, to better enhance details and layered structures of a human retina image, we propose a collaborative shock filtering for OCT image denoising and enhancement. Noisy OCT image is first denoised by a collaborative filtering method with new similarity measure, and then the denoised image is sharpened by a shock-type filtering for edge and detail enhancement. For dim OCT images, in order to improve image contrast for the detection of tiny lesions, a gamma transformation is first used to enhance the images within proper gray levels. The proposed method integrating image smoothing and sharpening simultaneously obtains better visual results in experiments.