ImageDistance

ImageDistance[image1, image2] returns a distance measure between image1 and image2.

ImageDistance[image1, image2, pos] places image2 centered at pos in image1.

Examples

Compute image distance:

img1 = ExampleData[{"TestImage", "Lena"}];
img2 = GaussianFilter[img1, 3];
ImageDistance[img1, img2]

With different metrics:

ImageDistance[img1, img2, DistanceFunction -> MeanSquaredDistance]

Please visit the official Wolfram Language Reference for more details.