After considered CBV, CBF and MTT images, rows that are less than row number 70 and rows that are more than row number 470 and columns that are less than 60 and more than 430 of all images are other information such as letters, numbers and stripes. This is an example of information that is not necessary for Mismatch, so it is possible to filter unwanted parts out of the image by changing such rows and columns into black pixels.