[Gimp-user] Lens distortion correction
Hi! Is there an easy way in GIMP to make corrections to those distortions that happen for instance, when we try to take a photo from a very high building (when the straigh edges get a bit rounded or inclined). I think there are some similar apps in wich we can do that by using a grid to distort the whole picture. Is there anything like that in GIMP? Thanks in advance, Victor Domingos http://lojamac.com/blog ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Lens distortion correction
Victor Domingos wrote: Hi! Is there an easy way in GIMP to make corrections to those distortions that happen for instance, when we try to take a photo from a very high building (when the straigh edges get a bit rounded or inclined). I think there are some similar apps in wich we can do that by using a grid to distort the whole picture. Is there anything like that in GIMP? Thanks in advance, Victor Domingos http://lojamac.com/blog I looked for this too and didn't find it. I blogged about it here http://www.johnallsopp.co.uk/blog200704.php#panorama where there's a link to a tutorial about a way to do it in Hugin, but I had some problems with that. So that's a possibility, but I'm still interested in hearing of Gimp ways to do it. J ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Lens distortion correction
That won't really work for curvature caused by lens distortion, because the distortion is... curved. On 6/21/07, Rei Shinozuka [EMAIL PROTECTED] wrote: yes, it's called Perspective or Change the Perspective of the layer or selection. it is on the main menu screen as a trapezoid. i've used it to correct keystoning of photographing a tall building, or a mural when photographed from off to the side. it gives you a grid for reference and it's quite handy. -rei ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Lens distortion correction
Is there an easy way in GIMP to make corrections to those distortions that happen for instance, when we try to take a photo from a very high building (when the straigh edges get a bit rounded or inclined). I think there are some similar apps in wich we can do that by using a grid to distort the whole picture. Is there anything like that in GIMP? Have a look at Grokking the Gimp, section 2.6.5 which deals with perspective correction. Norman ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Lens distortion correction
Victor Domingos wrote: Is there an easy way in GIMP to make corrections to those distortions that happen for instance, when we try to take a photo from a very high building (when the straigh edges get a bit rounded or inclined). John Allsopp wrote: I blogged about it here http://www.johnallsopp.co.uk/blog200704.php#panorama Rei Shinozuka wrote: yes, it's called Perspective or Change the Perspective of the layer or selection. it is on the main menu screen as a trapezoid. i've used it to correct keystoning of photographing a tall building, or a mural when photographed from off to the side. it gives you a grid for reference and it's quite handy. Nice, corrects perspective, but doesn't correct lens distortion, if I'm right. Anyone re lens distortion that makes staight lines curved? J ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Lens distortion correction
John Allsopp wrote: Victor Domingos wrote: Hi! Is there an easy way in GIMP to make corrections to those distortions that happen for instance, when we try to take a photo from a very high building (when the straigh edges get a bit rounded or inclined). I think there are some similar apps in wich we can do that by using a grid to distort the whole picture. Is there anything like that in GIMP? Thanks in advance, Victor Domingos http://lojamac.com/blog I looked for this too and didn't find it. I blogged about it here http://www.johnallsopp.co.uk/blog200704.php#panorama where there's a link to a tutorial about a way to do it in Hugin, but I had some problems with that. So that's a possibility, but I'm still interested in hearing of Gimp ways to do it. One of the tools on the Gimp front panel toolset since at least 2.2 is the Perspective Tool (see also the Shear Tool) which does just that. There are some relevant instructions in my out of date version of 'Grokking the Gimp' in the Panorama and Transform sections; perhaps someone else can point you to more recent and better versions. Doug ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Wow Linux Journal not very enamoured with GIMP.
On Wednesday 20 June 2007, Rachael H. wrote: Same here. I read that article and felt like they were bashing the Gimp. I did download Krista to see how it worked. I ended up uninstalling since it ran pretty slow. Seems like everything for KDE With Krita, what's exciting is how fast it progresses. It has insanely advanced features, but is still missing the basics in many ways. And now I'm so used to Gimp that I'm not sure if it was just me, or actual, but I felt the UI was veryrestrictive. runs slow! *LOL* Anyways I'm really used to the Gimp and it's fast The only thing I would add is the fact that the progress bars that seem to move at wildly different speeds (move quickly, pause, move quickly, pause, then suddenly the operation is done) make the speed feel...slow. showfoto under KDE has a great progress bar, and it seems to judge how long something will take very accurately. Photoshop has a good one...It makes it feel like you can gauge how long something will take... compared to other image editing software I used. In fact Im going to college for Media Arts Animation and they require you to use Photoshop..I have yet to use that program and even got some other Still think that having a shortcut layout that mimics PS would be a great feature. Just a shortcut list that's easily loadable like the Theme selector in Preferences. Would make it so easy to get a bunch of people over...but alas, talking about that got me banned from the list by the Dynamic Duo, so I'll shut up about it. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Wow Linux Journal not very enamoured with GIMP.
On Wednesday 20 June 2007, Eric P wrote: I really get peeved by these types of articles. GIMP is GIMP. Krita is Krita. CinePaint is CinePaint. Each is a tool. Use the right tool for the job. There are lots of hammers. Some are good for some projects. Others are good for other projects. None are good for all projects. As an author, he should know that and write accordingly. In this case, it looks like he's more interested in publicly bashing one tool (which would be an opinion piece, which this is not intended to be) instead of trying to help his readers (a reference piece or review, which this *is* intended to be). Nice retort. You should consider sending that to LJ's 'reader letters' section (which I always read as soon as my sub arrives in the mail). I've never been able to understand all the excessive bashing that GIMP regularly gets (UI complaints, color space limitations [which has I don't see much more bashing than anything else. It's the Windows Virus Syndrome: Gimp is just about the only great image editor in the Linux world with any serious usage over time, so it's going to get nailed by opinions. It also has a very different UI from most, so... And the color issues relate to it replacing PS for high-end work. I think people are saying Aww, shucks, I wish Gimp had this so I could ditch PS not Darn, I can't use Gimp to edit Little Susie's pictures because it doesn't have CMYK. Most newbies open up Gimp, see three weird windows pop up with a How-To dialog and say Yuck, what's this?. The name doesn't help either. Just basing this on countless interactions I've had with models or other photographers sitting here near my workstation, seeing me download my images and go through my workflow of digikam download - Gqview to delete the bad ones - Gimp to edit the good ones - showfoto to apply different color effects (Infra, BW conversion, etc.) In that context, it's quite easy to understand why people have strong opinions about it, especially since PS is a big chunkachange. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Lens distortion correction
I think in PS CS2 you can compensate (roughly) for actual lens distortions like barrel, pin-cushion, vignetting as well as key stoning (the last, you can do easily in GIMP) This company claims to actually have distortion profiles and lots of lenses to do specific corrections http://www.dxo.com/en/photo ASJF wrote: Hi ! You can try the Gimp Wideangle filter : http://members.ozemail.com.au/~hodsond/wideangle.html Cheers, Jeff Hi! Is there an easy way in GIMP to make corrections to those distortions that happen for instance, when we try to take a photo from a very high building (when the straigh edges get a bit rounded or inclined). I think there are some similar apps in wich we can do that by using a grid to distort the whole picture. Is there anything like that in GIMP? Thanks in advance, Victor Domingos http://lojamac.com/blog ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
