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. 2016 Apr 16;40(6):132. doi: 10.1007/s10916-016-0482-9

Fig. 4.

Fig. 4

Elaboration of optic disc image after image convolution with a Gaussian filter with a original image, b red channel convolution at σ=2, c green channel convolution at σ=2 and d red channel convolution at σ=8