Table 2.

Visualization mapping/techniques used in several approaches.

Visualization Techniques/Mappings	References
Visualization of features having filter from first to final layer	[27]
Visualize activations in first convolutional layer	[25]
Saliency map visualization	[55]
Classification and localization of diseases by bounding boxes	[68]
Heat maps were used to identify the spots of the disease	[70]
Feature map for the diseased rice plant	[78]
Symptoms visualization method	[72]
Feature and spatial core maps	[73]
Color space into HSV and K-means clustering	[74]
Feature map for spotting the diseases	[77]
Image segmentation method	[66]
Reconstruction of images on discriminant regions, segmentation of images by binary threshold theorem, and heat map construction	[67]
Saliency map visualization	[84]
Saliency map, 2D and 3D contour, mesh graph image	[82]
Activation visualization	[85]
Segmentation map and edge map	[65]