A device for interpreting user marks, comprising a) at least one image sensor; and b) a processor, c) wherein the device is configured to read at least one form comprising: i) at least one user marking area that is capable of being marked by a user of the at least one form, ii) at least one border of a first color at least partially surrounding the at least one user marking area, iii) a plurality of fiducial marks, wherein each fiducial mark comprises: a first portion of a second color, being visible to the at least one image sensor, and a second portion of a color different from the second color, wherein the first portion completely outlines the second portion, and wherein a ratio of the area encompassed by the first portion and the second portion to the area of the second portion is predetermined for each fiducial mark; and wherein the at least one user marking area is detected by the device based, at least in part, on: i) detection of at least one border of the first color, and 2) the determination of said ratio for each fiducial mark of the plurality of fiducial marks. a) at least one image sensor; and b) a processor, c) wherein the device is configured to read at least one form comprising: i) at least one user marking area that is capable of being marked by a user of the at least one form, ii) at least one border of a first color at least partially surrounding the at least one user marking area, iii) a plurality of fiducial marks, wherein each fiducial mark comprises: a first portion of a second color, being visible to the at least one image sensor, and a second portion of a color different from the second color, wherein the first portion completely outlines the second portion, and wherein a ratio of the area encompassed by the first portion and the second portion to the area of the second portion is predetermined for each fiducial mark; and wherein the at least one user marking area is detected by the device based, at least in part, on: i) detection of at least one border of the first color, and 2) the determination of said ratio for each fiducial mark of the plurality of fiducial marks. i) at least one user marking area that is capable of being marked by a user of the at least one form, ii) at least one border of a first color at least partially surrounding the at least one user marking area, iii) a plurality of fiducial marks, wherein each fiducial mark comprises: a first portion of a second color, being visible to the at least one image sensor, and a second portion of a color different from the second color, wherein the first portion completely outlines the second portion, and wherein a ratio of the area encompassed by the first portion and the second portion to the area of the second portion is predetermined for each fiducial mark; and a first portion of a second color, being visible to the at least one image sensor, and a second portion of a color different from the second color, wherein the first portion completely outlines the second portion, and wherein a ratio of the area encompassed by the first portion and the second portion to the area of the second portion is predetermined for each fiducial mark; and i) detection of at least one border of the first color, and 2) the determination of said ratio for each fiducial mark of the plurality of fiducial marks.