發(fā)布時間：2018-02-28 15:07

  本文關(guān)鍵詞： 糖尿病性視網(wǎng)膜病變 微血管瘤 Canny算子 區(qū)域填充　出處：《現(xiàn)代電子技術(shù)》2017年06期 　論文類型：期刊論文

【摘要】：糖尿病性視網(wǎng)膜病變進行早期篩查可以減少疾病的發(fā)展并且阻止隨后的視力損害。微血管瘤是糖尿病性視網(wǎng)膜病變的早期臨床癥狀,可以通過微血管瘤檢測對糖尿病性視網(wǎng)膜病變進行早期篩查。針對眼底圖像中視網(wǎng)膜血管、視盤、滲出物以及微血管瘤之間的相互關(guān)系,在紅色通道和綠色通道加權(quán)圖上定位出視盤,在綠色通道上采用基于簡單統(tǒng)計的自適應(yīng)雙閾值Canny算子進行邊緣檢測,并進行封閉區(qū)域的填充。設(shè)定閾值消除大面積對象并移除視網(wǎng)膜血管、視盤和滲出物得到微血管瘤的候選區(qū)域,最后根據(jù)形狀特征和顏色特征從候選區(qū)域中得到真正的視網(wǎng)膜微血管瘤。實驗結(jié)果表明,該算法能夠有效提取視網(wǎng)膜眼底圖像中的微血管瘤,敏感性和陽性預(yù)測值分別達到92%和86%,優(yōu)于現(xiàn)有一些典型的微血管瘤檢測方法,能夠精確地檢測出微血管瘤,可用在糖尿病性視網(wǎng)膜病變早期篩查中。
[Abstract]:Early screening for diabetic retinopathy can reduce the progression of the disease and prevent subsequent visual impairment. Microangioma is an early clinical symptom of diabetic retinopathy. Early screening for diabetic retinopathy can be performed by microangioma detection. The relationship between retinal vessels, optic disks, exudates and microangiomas in fundus images, The video disk is located on the weighted map of the red channel and the green channel, and the edge detection is carried out by using the adaptive double-threshold Canny operator based on simple statistics on the green channel. Set a threshold to eliminate large areas of objects and remove retinal blood vessels, optic disks and exudates to obtain candidate areas for microangioma, Finally, the real retinal microangioma is obtained from the candidate regions according to the shape and color features. The experimental results show that the algorithm can effectively extract the microhemangioma from the retinal fundus image. The sensitivity and positive predictive values were 92% and 86, respectively, which were superior to some typical microhemangioma detection methods, and could be used in the early screening of diabetic retinopathy.
【作者單位】： 福建農(nóng)林大學(xué)計算機與信息學(xué)院;福州大學(xué)物理與信息工程學(xué)院;廈門大學(xué)信息科學(xué)與技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金項目(60827002) 福建省自然科學(xué)基金項目(2012J05116) 福建省教育廳項目(JA13037)
【分類號】：R587.2;R774.1;TP391.41

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