This is a multi-part message in MIME format. --------------060702060403010601030304 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 18/05/2010 18.53, Sarin Sukumar A wrote: > YOurs SaRIn.... > > > For test I used Photoshop (->Filter -> Other -> Custom) and a matrix 3x3 > like this: > > -1 > > > > > > 1 > > > this enhance the upper side of the contour > > > I didnt understand that. > filtered using a 3X3 matrix, but after that? and what kind of matrix? > I'm sorry: forget that the list server filter html and the table is lost. Was: 0 -1 0 0 0 0 0 1 0 In a previous message was mentionated the convolution and the base for a convolution is a square matrix. In this case you can use the formula: newpixel = pixel[y+1] - pixel[y-1] Find attached the resulting image. (prior the convolution I low filtered the image) Remember also that the JPEG compression is known to introduce high frequency noise and artifacts so you must not use it in the real application. Of course it's ok for sending image to list cause size limit! --------------060702060403010601030304 Content-Type: image/gif; name="sarin-2.gif" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="sarin-2.gif" R0lGODlhAwKoALMAAAAAAHt7e3Jycre3t0lJSYODg2pqamNjY4uLi8nJyVxcXJSUlFNTU5ub m6Ojo6ysrCH5BAAAAAAALAAAAAADAqgAAAT/EMhJq7046827/2AojmRpnmiqrmzrvnAsz3Rt 33iu40zP7MCgcEgsGo9I2sFgSDqf0Kh0Sq1ar9isdsvter9gJ2EcLpvP6LSUoTgcFD6CGjsm z+/4PMwgCBQCAQIGcHpRBGxvDHIrPYsphz2FkpM1AQsOmA0LBQIHlEgMBwIFf50qbQZuCimh TE2fsLEpDgO1Aw8NCLJGAggNDS0GfqWrND4/u8nKy5MHlpibAjVLgszWHnV219tHAgsPtg0F 3COO5CcEbYnm5+3u74Who8Tw9fb3ZQG+DrnS+P8AAwocSAJSHYIIEyqMcYhaKgXsFkoc4cbT xH8KhCFYgCAQoYsg/0OKxICA0wFFI1OqvNhRQLGL2lbKnBkwEs2bOHPq3MnwIM+fQCWxUUAU ZdCjSMswEEYqwKCkUJP5HKhvwYIOMaPKhIRMD6JEK79+1JoSEROweOT56dQ1pDxS1ciOfIug pKk8+n51vNaIhUare+WK1NggEwJ/gmOwOTs2Mc6IHfQ5vpFxVEmnLyfLJJpZM5CsE/Ly2/T0 xtDOnq0QrYg6A5NYkNP6EDGmUewJuAq8qtGmz93UJVY3jiFsmFPgvCta/HCID1snfzkhJ5ER kKDWLEYtKKxJ93QXtTOWWKpvXBRM30co0M7Ro4wC32zhOp6eFSrEI6eGrL24QOEHDkSTw/8D C+BXH3XFmUdQHBmwYRNIX/HhRSoHioTKIG3h1AcgCm4RyG4VStQHXCFeNFyJKF70xokptpie ADBe5+KMB9bVkgn60aijTIUF2GEIh8Bx245EbvDVTJWBWCQGQxlFpHMGFnLIkmJUBuNJQxbB 4j2kxNIGlUmIAl97pT3hW5lgppnGKMAAEOAUBdQlnTLZqGnnDj1eJVUrD2V4558qsTGiXW8c VVtAOQLKC3yG0QeUOgGps5yilCbzIAwbRlnpppx26umnoIYq6qikfspfqajWcyF2qbbq6quw xirrrLT2lKUMXNWqKzpTaiCpn8ZcSOGuF0BCLAasTjAiZjqM+OP/sQCsxhi0I1g1J7VEwGjc b9h2q8VGvwjobYnTjmsuFstyWx9XwIKQ6LlzxNmdptNR81xwRan5bkJvljhoACjEhUcbQu4S JFrwpvmDMIKcJEt1gBjQbsI0LqFPS5NS/Ccik/RxiY/0akxlZYCsxJnISYlp1SYqwQgUE4LA rKS3vTgADoHPdvFVxoBuSMrPgazg8qcF0JLA0Q+cIQogH56S6cxyWbbdL+H+gXIFl6pnbw7O gMuR1SeoTCYLrI0ETi0P4KLL1QB8+MatyDLVJQ41pw1gLgH7krYDga1QMtvw8IzCz+p+oF24 gEOrloxJ0DKAA4knMRRw1W2EcbKRW+Mc/3CEjdYR1Jnb50boE+QCMOnB+HYnZxOjnk9dd0KZ Suuu1w7CX4TarvsJl9zd908b7i68CeytfQVnWw4P6MdayI658tBPEGd7IUdvPQC9+3j99tzj E17WKAvePQe9wQj6HUBX3/KVtI9PAVOXfUL1JqdL5Ir4FOS+w9DuY8FPFg6DwrKCJgU/1I8c XIHbHZZQESLRD01IgE/VDpiEMRmPHA4plCwMaB1uMA0MozHJE+KTNnFU6F/nK8TK5NS0ZVgO DGgznRQScAsTciNT6juCnpSRia8Fwnyji4K9/taOfk0haeSoy9cQ8poBAYgjJWkKEZGwtDjZ KGdFGFb/0FCcIP/cbX4cMZMEbfZELAqBYVvk4sWOACAxNgAcR6MhzpxgxjRSyT8DiOPRAPA4 O/rxj4B0VYxy6Cn8BdIFw7gMISnFhykeEgZ54Q7LSlWVCz7yBXqzhRHBtJqybaAwy/hSqt4I gDj2EUzU4JB1DOkE8F3yhFXZztcWqaVUBPCVIWKU3Z54BTH9IYW4FFnX9EJBMzSxHo2kZTCF Fp9TosFnYHOHH64osGUqRF7ElOY+DHOtE9yPKGlcUfsk0bsaWvIa+nCcJid5AmdZB5jD803D nvcpBNCiArfYoQkY5bliQrKDtZKaDwsHAFaGapMkaOYt+OZPFmBzibTS2834cZgKxKj/ofB6 gB5pyLf3XGKdtPIPHI9WCxtSIE62axMM4mPKjsbKEhqlANL0iQY2zApysbInLJYAT2tqLHjM gNk7fZq4QdkIo0Q11+F6pFJfEUWZSbXC0wy6QJ4+xAV1s8UHYIbSqJoBPorchVE5AUHi2TOP CQjBNLeTGmMVIiOuSINzrvqBj3VnF/LiZjX32YABlKB3njHL7AoxjDVd7A+BoKoE5EPTSYjU FuaE6p/g0BY+AK2swBljCJFaD5KalFR8UJIENeGo6cAUsmrzahEMmIEAcTYx3wBVbtQQI9XK RY7sPEM0bauVfNZRMD2gZ7dEwT94OBM5oVUstCzbFKKW57XU/yKMXngrMl+gDXAa5IkoqVuI 2u6EuMXlLh5+244VKfcClrFLFSpyTIJINn/x+8kSQLKhFo6An+J4bw449AfyjuRjFIXuYPwA kum15wTXpcL0NBHGnagTQOecyV9CQka8kdNmt8BFBZrS04GcVY/HvUlekEixjViLgBOpWR4r QGKc2BMcInvjE2GX4qKtWLzwYtONuyesDifOuv1rJNA2FVwG4thv4NJEhO0k1FL4+ED+Hcgb /cqpEW2HoiJ0oJqeXOByxrCbNGrqjupr35tMeaOz3VHaUkOKJWtgrYBBMVAS0OJKtXcn0wXB Piaa3yM7gWlz40lqP3Dmlv7Oz0TwWjtj0zMAMSO6CHt7tKQ5ENdJd0uVArZ0q5Lc4GV4V9MB KUwM3TyJYUQZ1ORAK52Z4YtfoJpaa361rB8ZAQA7 --------------060702060403010601030304 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --------------060702060403010601030304--