Patent ID: 7664338

Claim:
An embedded device, comprising: microprocessor; an image of interest selecting mechanism; and a transformation mechanism to apply a perspective transformation function to the image of interest such that the image of interest varies from a greater width at a foreground viewpoint of the image of interest to a lesser width towards a vanishing point of the image of interest and such that the image of interest varies from a greater amount of expansion and lesser amount of compression at the foreground viewpoint of the image of interest to a lesser amount of expansion and a greater amount of compression towards the vanishing point of the image of interest, wherein the perspective transformation produces an output image having two parallel edges of length D and W, where D is the length of the smaller edge, the smaller edge starts at the x-coordinate x start , and wherein the transformation mechanism executes Equations (1) and (2) below: x out = W - 1 Δ ⁢ ⁢ x · x in + x start , ( 1 ) y out = y in · 2 ( H - 1 - y in H - 1 ) · k , ( 2 ) wherein k is a constant indicative of the amount and smoothness of expansion and compression in the perspective image, W is the width of the image of interest in pixels, H is the height of the image of interest in pixels, x in and y in are input pixel coordinates of the image of interest in pixels, and x out and y out are output pixel coordinates in pixels.