Comments on: Deconstructing an image http://jeffmatherphotography.com/dispatches/2007/09/deconstructing-an-image/ The Post-9-to-5 Life of an International Playboy Sun, 20 May 2012 16:44:08 +0000 hourly 1 http://wordpress.org/?v=3.1.1 By: Jeff Mather http://jeffmatherphotography.com/dispatches/2007/09/deconstructing-an-image/comment-page-1/#comment-45978 Jeff Mather Wed, 18 May 2011 12:59:50 +0000 http://jeffmatherphotography.com/dispatches/2007/09/deconstructing-an-image/#comment-45978 Simon: Thanks for your interest. It's been a while since I made the image, and I don't have the exact commands, but this will give you a similar output. The main differences seem to be in the choice of colormap and the actual conversion I used to go from RGB HDR to log-2 LDR; hopefully, this is close enough to get you started. [code lang="matlab"] RGB = hdrread('office.hdr'); X2 = rgb2gray(RGB); L = log2(X2); figure; imshow(L,[]); colormap(jet); colorbar [/code] Simon: Thanks for your interest. It’s been a while since I made the image, and I don’t have the exact commands, but this will give you a similar output. The main differences seem to be in the choice of colormap and the actual conversion I used to go from RGB HDR to log-2 LDR; hopefully, this is close enough to get you started.

RGB = hdrread(‘office.hdr’);
X2 = rgb2gray(RGB);
L = log2(X2);
figure; imshow(L,[]); colormap(jet); colorbar
]]> By: Simon http://jeffmatherphotography.com/dispatches/2007/09/deconstructing-an-image/comment-page-1/#comment-45921 Simon Tue, 17 May 2011 18:42:07 +0000 http://jeffmatherphotography.com/dispatches/2007/09/deconstructing-an-image/#comment-45921 Hi Jeff, Could you possibly describe exactly how you made the false-color visualization for the HDR image (the third image from the top of the post), including the color scale on the right. Thanks. - Simon Hi Jeff,

Could you possibly describe exactly how you made the false-color visualization for the HDR image (the third image from the top of the post), including the color scale on the right. Thanks.

- Simon

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