Notes13 - Honors 208W Fall 2011 Straightening using GIMP...

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Unformatted text preview: Honors 208W Fall 2011 Straightening using GIMP Vanishing Pixels Image Rotation Demo App, Evan Golub otes 2005-2011 : Evan Golub (egolub@acm.org) traightening an Image hen shooting freehand, or even with a tripod, we sometimes dont position the camera perfectly aligned to the desired vertical/horizontal. By rotating the image on the canvas, we can correct this. hen rotating, we will likely be forced to crop the image or we would need to expand the canvas and have blank areas in each corner. otes 2005-2011 : Evan Golub (egolub@acm.org) osing Information NOTE: Rotating anything other than multiples of 90 is a lossy operation no matter what raster format you are using. The problem comes from the fact that for angles that are not multiples of 90 , there will be pixels that no longer have a logical location on the x,y grid provided. This means some pixels will be lost in rotation....
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This note was uploaded on 01/13/2012 for the course HONR 208W taught by Professor Golub during the Fall '11 term at Maryland.

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Notes13 - Honors 208W Fall 2011 Straightening using GIMP...

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