Realization

• Basic Alignment

• Automatic crop the white and black boundary of the images

• Automatic Contrast, linear map every channel to (0,255)

• Better feature of edge Extraction, using edge instead of raw RGB pixel for alignment

• Color Transfer, transfer the color by adjusting the standard deviation and mean according to reference, this one is for fun

Result

1. Alignment

Good Result

Bad Result

• 

• Reason: For picture with uniform texture like grass, edge feature result is not ideal for representing the information

2. Auto Contrasting

2. Color Transfer

original img

reference img

Output