1. An image processing method comprising: receiving an indication corresponding to a location in an image, the image comprising a first plurality of pixels, each pixel having a plurality of values, the image stored in a memory; identifying a region coincident with the location, the region comprising a second plurality of pixels; extracting a plurality of recognition channels from the second plurality of pixels, wherein the plurality of recognition channels comprises a red, a golden, and a white recognition channel each having a plurality of values each having a one-to-one correspondence to a corresponding pixel in the second plurality of pixels, and wherein each value in the red recognition channel is determined as follows: momochrome  value  of  the  red  recognition  channel  = red ⁢ ⁢ value - green ⁢ ⁢ value + blue ⁢ ⁢ value 2 , wherein ‘red value’ represents a red component value of the corresponding pixel in the second plurality of pixels, ‘green value’ represents a green component value of the corresponding pixel in the second plurality of pixels, and ‘blue value’ represents a blue component value of the corresponding pixel in the second plurality of pixels; identifying a first site in each of the plurality of recognition channels; identifying a prominence bitmask for each of the plurality of recognition channels, each prominence bitmask corresponding to an artifact in the image; and determining at least one metric for each of the plurality of prominence bitmasks.