Links to test images:
General Collections
Computer Vision Online – huge collection of test images.
CMU – Face, fingerprint, medical…
Imageprocessingplace.com – Standard, medical, microscope, face, fingerprint, satellite, space, leaf, among others
Corners
Dr. P Rocket’s Corner Dataset
FAST Corner Detection Dataset – warped images to test corner detectors
SIFT, SURF, etc.
Affine Covariant Regions – commonly used test set
Classification
MNIST – famous database of handwritten digits