Revision as of 19:14, 22 February 2006 edit Aursani (talk \| contribs) 385 edits No edit summary ← Previous edit		Revision as of 14:00, 4 April 2006 edit undo Salix alba (talk \| contribs) Edit filter managers, Administrators 26,201 edits →Calculating the 1st derivative: link image gradient Next edit →
Line 21: === Calculating the 1st derivative === Many edge-detection operators are based upon the 1st [[derivative]] of the intensity - this gives us the intensity [[Image gradient\|gradient]] of the original data. Using this information we can search an image for peaks in the intensity gradient. If ''I''(''x'') represents the intensity of pixel ''x'', and ''I''′(''x'') represents the first derivative (intensity gradient) at pixel ''x'', we therefore find that:

Edge detection: Difference between revisions