Abstract: A method for analyzing an image formed of a plurality of pixels, each pixel of the plurality of pixels including a plurality of color channels, each color channel of the plurality of color channel having a channel level within a range of channel levels corresponding to each pixel, including designating from the plurality of color channels a primary channel, a secondary channel, and a tertiary channel; generating histogram data from the image using the plurality of pixels to form a histogram having a first axis and a second axis based on the primary channel, the first axis pertaining to the range of channel levels within the primary channel, and the second axis pertaining to a number of pixels of the image at each the channel level within the primary channel; and reorganizing the histogram based on the secondary channel and the tertiary channel to form a multi-dimensional histogram.

Abstract: A method for performing duplex copying of a document having a first side with a first image and a second side with a second image includes scanning only the first side of the document under a first imaging condition to retrieve first information relating to each of the first image and the second image; scanning only the first side of the document under a second imaging condition to retrieve second information relating to each of the first image and the second image; determining from the first information and the second information contents of the first image on the first side of the document; and determining from the first information and the second information contents of the second image on the second side of the document.

Abstract: A method for analyzing an image formed of a plurality of pixels, each pixel of the plurality of pixels including a plurality of color channels, each color channel of the plurality of color channel having a channel level within a range of channel levels corresponding to each pixel, including designating from the plurality of color channels a primary channel, a secondary channel, and a tertiary channel; generating histogram data from the image using the plurality of pixels to form a histogram having a first axis and a second axis based on the primary channel, the first axis pertaining to the range of channel levels within the primary channel, and the second axis pertaining to a number of pixels of the image at each the channel level within the primary channel; and reorganizing the histogram based on the secondary channel and the tertiary channel to form a multi-dimensional histogram.