Morphological Edge Detection Algorithm of Colon Pathological Sections Based on Shearlet

Table 1

Objective evaluation results.

Algorithm	MSE (dB)				PSNR (dB)
	Section 1	Section 2	Section 3	Section 4	Section 1	Section 2	Section 3	Section 4
Denoising with Gaussian filter	7.89	7.51	7.60	8.01	39.16	39.38	39.32	39.10
Denoising with wavelet transform (db2)	4.57	5.94	5.91	5.27	41.53	40.39	40.41	40.91
Denoising with wavelet transform (sym4)	4.39	5.60	5.74	5.00	41.71	40.65	40.54	41.14
Denoising with traditional Meyer Shearlet	4.26	5.42	5.55	4.85	41.84	40.79	40.69	41.27
Denoising with Meyer Shearlet in the form of “(30)”	4.10	5.28	5.47	4.74	42.00	40.91	40.75	41.37
Denoising with Meyer Shearlet in the form of “(31)”	4.12	5.28	5.48	4.76	41.98	40.91	40.74	41.35