http://www.usa.canon.com/cusa/support/consumer/projectors_visualizers/projectors/lv_7275?pageKeyCode=writeReviewPage
LV-7275
18992
Features
Screen Color Correction
Useful when a projection screen is not available, the LV-7275's Screen Color Correction feature allows you to project directly onto a wall, correcting the distortion of colors caused by the color of the projection surface. The LV-7275 lets you choose from 8 different projection surface colors. 
In addition to the 8 screen colors, a Whiteboard Mode is also available for projecting images onto whiteboards. The Whiteboard Mode dramatically reduces the reflective "bright spots" on a whiteboard, helping to maintain genuine color re-creation. The often used green chalkboard is especially usefull in the classroom setting. 
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