Some Patttern Recognition Problems : 

Image Recognition using Affine Invariant Patches (MATLAB)

Surface Recognition using Geometric Invariants (JAVA)

Recognizing rocks and rock-cracks within images of the Martian surface (JAVA)

Recognizing  texture variations within a transmission electron microscope image (MATLAB)

Segmentation of images into perceptually distinct objects (MATLAB)

Segmentation of 3D surfaces into semantically different components (JAVA)

Segmentation of insect venation patterns in flies (MATLAB)

Segmentation of butterfly coloration patterns (MATLAB)