Comparison and extension of three methods for automated registration of multimodal plant images

Table 2 Overview of three groups of image alignment methods including feature-point (FP) matching, phase correlation (PC) and image intensity (mutual) information (INT) image features and corresponding MATLAB functions used for calculation of pairwise image correspondences

Method	Feature	MATLAB function	References
PC	Phase correlation	imregcorr	[15,16,17]
INT	Mutual information	imregtform	[28,29,30,31,32]
FP:BRISK	Corners	detectBRISKFeatures	[38]
FP:FAST	Corners	detectFASTFeatures	[7]
FP:Harris	Corners	detectHarrisFeatures	[9]
FP:KAZE	Blobs	detectKAZEFeatures	[39]
FP:MinEigen	Corners	detectMinEigenFeatures	[8]
FP:MSER	Intensities	detectMSERFeatures	[11]
FP:SURF	Blobs	detectSURFFeatures	[12]

All methods are used with the ‘similarity’ option, which restricts the class of possible image transformations to a combination of global rotation, scaling and translation

ISSN: 1746-4811