BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Defish routine          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message Hertwig Guest Posted: Tue Mar 29, 2005 4:34 pm    Post subject: Defish routine I just bought myself a fish lens (Sigma 15 mm, hehe) and although I can defish with PaintshopPro I was wondering if anyone knows of a routine how to do this in Delphi. Any help? Tnx! Back to top Finn Tolderlund Guest Posted: Tue Mar 29, 2005 9:12 pm    Post subject: Re: Defish routine "Hertwig" <bont2 (AT) hotmail (DOT) com> skrev i en meddelelse news:4249839f (AT) newsgroups (DOT) borland.com... Quote: I just bought myself a fish lens (Sigma 15 mm, hehe) and although I can defish with PaintshopPro I was wondering if anyone knows of a routine how to do this in Delphi. Use a non-fish lens instead? What is a fish lens anyway and what should a defish routine do? -- Finn Tolderlund Back to top Nicholas Sherlock Guest Posted: Wed Mar 30, 2005 8:44 am    Post subject: Re: Defish routine Finn Tolderlund wrote: Quote: Use a non-fish lens instead? What is a fish lens anyway and what should a defish routine do? A fish-eye lens is a very wide field of view lens (Some go up to 180 degrees). A defish routine would try to remove the distortion from the lens to get a normal looking image. I wouldn't fancy your chances of finding a component to do this in Delphi. From what I understand, it's pretty involved. You might be able to drive a package like PTLens (I think it comes with "Panorama Tools") from the command line. Cheers, Nicholas Sherlock Back to top Finn Tolderlund Guest Posted: Wed Mar 30, 2005 8:52 am    Post subject: Re: Defish routine "Nicholas Sherlock" <N_sherlock (AT) hotmail (DOT) com> skrev i en meddelelse news:424a6700 (AT) newsgroups (DOT) borland.com... Quote: Finn Tolderlund wrote: Use a non-fish lens instead? What is a fish lens anyway and what should a defish routine do? A fish-eye lens is a very wide field of view lens (Some go up to 180 degrees). A defish routine would try to remove the distortion from the lens to get a normal looking image. I see. Is there any such fish-eye images on net that one can look at? -- Finn Tolderlund Back to top Nicholas Sherlock Guest Posted: Wed Mar 30, 2005 8:55 am    Post subject: Re: Defish routine Finn Tolderlund wrote: Quote: Is there any such fish-eye images on net that one can look at? This site looks okay: http://www.zeta.org.au/~andrewa/ajaa31.htm Cheers, Nicholas Sherlock Back to top Hertwig Guest Posted: Wed Mar 30, 2005 11:42 am    Post subject: Re: Defish routine Here you can see some samples of the Sigma I have bought: http://www.pbase.com/cameras/sigma/15_28_ex There are two types of Fish lenses. A circular and diagonal type. The Sigma 15mm is a diagonal typed fish lens. Back to top Robert Meek Guest Posted: Sun Apr 10, 2005 11:42 am    Post subject: Re: Defish routine As a photographer myself I can tell you this much: Trying to "defish", as you call it, an image made with a fish-eye lens of any type is definitely an exercise in futility! The code to do so programmatically would have to be customized for the exact distortions caused by the lens and then a large amount of image loss would occur. The same is true in attempting to take an image or series of images taken by degrees and combine them to look as if taken in one shot via a fisheye lens. Finally, even a fisheye lens itself introduces a certain amount of image distortion and loss of quality, with each and every lens exhibiting some differences from each other. The methods used to grind and correct such lenses are based on broad analysis and really cannot be proofed mathematically to any certain degree! -- from Robert Meek dba "Tangentals Design" Personal e-mail: [email]rmeek1 (AT) comcast (DOT) net[/email] ------------------------------------------------- visit us on the World Wide Web and pick up your free copy of "The Keep" at: http://www.TangentalsDesign.com E-mail us at one of the following: [email]information (AT) tangentalsdesign (DOT) com[/email] [email]feedback (AT) tangentalsdesign (DOT) com[/email] [email]support (AT) tangentalsdesign (DOT) com[/email] ------------------------------------------------- "Hertwig" <bont2 (AT) hotmail (DOT) com> wrote Quote: Here you can see some samples of the Sigma I have bought: http://www.pbase.com/cameras/sigma/15_28_ex There are two types of Fish lenses. A circular and diagonal type. The Sigma 15mm is a diagonal typed fish lens. 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