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为研究虹膜膨隆形态与瞳孔阻滞的关系,提出了一种根据裂隙图像提取虹膜膨隆形态的方法。通过灰度变换、二值化处理、角度校正及曲线拟合等方法对图像进行处理。建立了不同压强差下无晶体抬升时虹膜膨隆形态二维曲线及三维曲面模型;以及相同压强差下晶体抬升高度不同时虹膜膨隆形态的二维曲线及三维曲面模型。从实验结果可以看出,随着压强差的不断增大,虹膜逐渐膨隆;在相同的压强差下,相对于没有晶体抬升,有晶体抬升的虹膜膨隆程度更大。
In order to study the relationship between bulging iris and pupillary block, a method of extracting the bulge of iris based on the fracture image was proposed. The image is processed by methods such as gray-scale transformation, binarization, angle correction and curve fitting. The two-dimensional curve and the three-dimensional curved surface model of iris bulging with different pressure difference were established. The two-dimensional curves and three-dimensional curved surface model of the iris bulge with different lifting heights under the same pressure difference were established. It can be seen from the experimental results that the iris is gradually bulging with the increasing of pressure difference; in the same pressure difference, the degree of iris bulging with crystal elevation is larger than that without crystal lifting.