1. A method comprising: sampling pixels within a first component region of a tool impression in a digital image; determining a first distribution of a pixel property of the sampled pixels within the first component region; sampling pixels within a second component region of the tool impression; determining a second distribution of the pixel property of the sampled pixels within the second component region; receiving a predetermined parameter that is independent of the distributions of the pixel property; computing an adjustment factor based on the distribution of the pixel property using a processing unit, based upon both the first distribution and the second distribution; computing an assisted tolerance parameter based on the adjustment factor and the predetermined parameter using the processing unit; specifying one or more edit classes based upon the predetermined parameter and the assisted tolerance parameter, wherein the one or more edit classes define one or more respective subsets of the distribution; and collectively editing all of a subset of the sampled pixels that correspond to one of the subsets of the distribution defined by a respective one of the edit classes by applying a same edit operation to each pixel in the subset of the sampled pixels using the processing unit.