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Table 1 Measured CIR values for ROIs including phantom features

From: Mathematical morphology-based approach to the enhancement of morphological features in medical images

ROI Measured CIR values for various image enhancement methods
  Proposed HE LCS USM MSR CLAHE
R 1 14.8291 1.3832 0.0337 2.1091 0.5043 3.8390
R 2 199.3442 9.8188 0.0330 1.9410 0.5647 11.7008
R 3 229.1748 8.3543 0.0903 2.0105 0.3285 12.6779
  1. Proposed method, histogram equalization (HE), linear contrast stretching (LCS), unsharp masking (USM), multiscale retinex (MSR), and contrast limited adaptive histogram equalization (CLAHE).