Initial import of perceptual diff


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Cleaned up formatting of help text


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Refactored RGBAImage into its own file
Added code for accesing Laplacian Pyramid levels


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More refactoring, moving functions into their own files


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added in the tvi, csf and masking functions


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Simple luminance only comparison


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Added readme



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Defined M_PI for systems that don't have it


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Added the GPL liscence file


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Updated build instructions


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Renamed to perceptualdiff to avoid namespace conflict with a2ps


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Fixed build warnings for windows

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Added color testing as well

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Fixed warning

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Updated version to 0.9b

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Added framework for writing difference image


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Added output to ppm files


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Added PNG file read contribution from Scott Corley



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Updated readme


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Added test images for QA


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