Table 1.
Image preprocessing methods used for segmentation of skin lesions.
| Study | Method |
|---|---|
| [2] | Artifact removal using morphological operations and image enhancement with unsharp filtering. |
| [8] | Artifact removal using thresholding and image enhancement with a median filter. |
| [9] | Artifact removal using the bottom-hat filter, dark corner removal with thresholding, and color enhancement by the intensity with saturation features of the HSV color model. |
| [12] | Artifact removal using DullRazor. |
| [17] | Artifact removal using DullRazor and image enhancement by noise filtering with intensity adjustment. |
| [19] | Artifact removal using improved DullRazor and image enhancement with top–bottom filtering, contrast stretching, and log transformation. |
| [20] | Artifact removal using averaging filter and image enhancement with contrast enhancement. |
| [21] | Artifact removal using multiscale decomposition. |
| [22] | Image enhancement using contrast enhancement method. |
| [23] | Artifact removal using a fast line detector and image enhancement with gamma correction. |
| [25] | Artifact removal using DullRazor. |
| [26] | Artifact removal using threshold decomposition and image enhancement for illumination correction with homomorphic filtering. |
| [27] | Image enhancement using adaptive gamma correction. |
| [28] | Artifact removal using DullRazor. |
| [31] | Image enhancement using mean subtraction and standard deviation-based normalization. |
| [32] | Artifact removal and image enhancement using color constancy with shades of gray. |
| [33] | Artifact removal and image enhancement using histogram-based preprocessing. |
| [34] | Artifact removal using a deep learning method. |
| [36] | Artifact removal using DullRazor. |
| [37] | Artifact removal using morphological operations and image enhancement with histogram equalization. |
| [38] | Artifact removal using DullRazor. |
| [39] | Artifact removal using DullRazor and image enhancement with global-local contrast stretching. |
| [40] | Artifact removal using median filter and image enhancement with contrast-limited adaptive histogram equalization. |
| [41] | Artifact removal using Frangi Vesselness filter and image enhancement with contrast-limited adaptive histogram equalization. |
| [47] | Artifact removal using DullRazor and image enhancement with adaptive histogram equalization. |
| [48] | Artifact removal using DullRazor with a median filter. |
| [49] | Image enhancement using adaptive histogram equalization. |
| [50] | Image enhancement using contrast limited adaptive histogram equalization. |
| [51] | Image enhancement using contrast limited adaptive histogram equalization. |
| [52] | Image enhancement using Z-score transformation. |