One important application of electronic digitizers is the scanning of line art (engineering drawings, parts drawings, etc.). Typically, line art drawings are digitized with the ultimate goal of obtaining binarized data. Resolution requirements for scanning of line art (engineering drawings, part drawings, etc.) are sometimes difficult to calculate, and are usually determined by subjective evaluation or trial and error. Too much resolution is inefficient and consumes unnecessary resources, while too little resolution may be incapable of resolving detail adequately. One method often used is to set the scanning pixel size to twice the minimum line width found in the drawing. It can be shown that this method will yield good results for a fixed threshold binarization, assuming even illumination, but equivalent results can be obtained by scanning at lower resolution (larger pixel size) and using an adaptive threshold binarization which operates on local areas.