Method for processing physical document images

A method for performing image processing of a physical document image, comprising:

• receiving an image file comprising an image of a physical document and at least one control target;
• measuring control target attributes of the at least one control target, wherein measuring the control target attributes of the at least one control target includes:
• numerically measuring a degree of focus of the image file based on the at least one control target, wherein numerically measuring the degree of focus of the image file based on the at least one control target comprises:
• determining a location of a light-dark pattern area of the at least one control target;
• determining pixel values of the light-dark pattern area;
• determining a ratio of dark to light pixels for each of a plurality of segments of the light-dark pattern area;
• determining which of the plurality of segments of the light-dark pattern area exceed a predetermined dark-to-light pixel ratio threshold;
• and
• determining the degree of focus based on a number of segments that exceed the predetermined dark-to-light pixel ratio threshold;
• and
• performing a static crop of the image file based on the control target attributes by removing the at least one control target from the image file to create a cropped image.