fe-credit-card-fault-detection

Project in Developer Circle (DevC) is sponsored by Facebook. The course is ogranized at CoderSchool. The problem is selected among company in Vietnam which is of Fe-Credit.

Sumary

For detection fake or real Vietnam identity card.

Input: the identity card image
Output: card fake or real

Assumtion: a straight image is considered template image. Not for distorted or dark or low resolution image.

Result: detect fake card on

card template: size, ratio size of card
profile image with a selfie image (user capture thier picture manually)
national emblem: just check with templage image
information of identity card: Id number, full name, day of birth, address

Method

Card teamplate Border of card is main factor to verify. We find border of image then crop exactly follow by border to facilitate later steps.

To detect border, we filter image by color (dark green) then get contour image.

Result:

Cropped card: (example)

Profile image We crop profile image and apply some algorithms:

Profile image must be a person (not animal or stuff)
Person do not wear glasses
Person do not smile/laught ( kind of neutral)
Compare with selfie image

National emblem We crop national emblem from cropped card then using opencv image template matching to check

Information Thank to the exactly cropped card, we again crop different area on image for extracting information. If a real card, it will has const ratio size so we can know where area has the needed information (ex: card id, name, address,...)

Using opencv ocr tesseract, we will get information on card but it is not be exact. Image is filtered in many differnce range colors then we get the best result from previour filter color to apply OCR on that image by frequently appear resutl.