I want to use the warp tool to correct some complex shift lens distortion (lens distortion filter isn't precise enough, neither are other cs3 plugins, just in case someone wants to make those suggestions.)
About the warp tool, does anyone know if it's possible to change the grid size? I want to select the whole image but have smaller grid panes.
I suspect that the warp tool is not what you want. The transform tool will probably make the corrections you want. If you post the image, I can show you what I mean.
The transform tool's (distort and skew) not accurate enough either, not if the lines aren't parallel. They just pulled everything one way (distort less so than skew.) Not kidding, I've been trying to figure this out for ages!
The transform tool's (distort and skew) not accurate enough either, not if the lines aren't parallel. They just pulled everything one way (distort less so than skew.) Not kidding, I've been trying to figure this out for ages!
If you posted the image, you might get some useful advice.
Perhaps, but in low-res you wouldn't be able to notice the distortion, not straight off, and don't wish to post a high-res version, as it's part of a job. Plus the picture is just one of many taken with the shift lens, and I'm looking for a faster and more accurate way of correcting the distortion across all pics, shift or not. Ona Mac Intel you're limited in what you can use to correct lens-specific distortion. LenFix CI softens the image too much and on a mac intel the CPU version only works on CS2, which is so slow. Plus you have to expand the canvas and move the image into the correct position within the image circle that it just becomes a pain to do on many images. Especially if you want to use bracket, stack and blend to increase dynamic range, too. With the warp tool, you can leave the distortion correction till the end.
You've got a problem that is so subtle, one couldn't even see it on a low-res image. Since you won't show it on a high-res image, I'm not sure how you think anyone here can help you. Photography is a visual medium.
NoBob wrote:
Perhaps, but in low-res you wouldn't be able to notice the distortion, not straight off, and don't wish to post a high-res version, as it's part of a job. Plus the picture is just one of many taken with the shift lens, and I'm looking for a faster and more accurate way of correcting the distortion across all pics, shift or not. Ona Mac Intel you're limited in what you can use to correct lens-specific distortion. LenFix CI softens the image too much and on a mac intel the CPU version only works on CS2, which is so slow. Plus you have to expand the canvas and move the image into the correct position within the image circle that it just becomes a pain to do on many images. Especially if you want to use bracket, stack and blend to increase dynamic range, too. With the warp tool, you can leave the distortion correction till the end....Show more →
I use a TS lens and am having difficulty imagining what could be so subtle too. Even the crop tool can bring perspective under control. If there is a perspective error then it is propagated across the entire plane in which it appears. Perhaps he doesn't wish to adjust the entire plane - he has one "tweak" in mind. I have duplicated layers and then adjusted one and blended with the underlying to get the desired effect.
If that ain't it I can't do much more with so little.
regards,
Jon
Peano wrote:
Wonderful. A solution to a problem that remains a total mystery to everyone here. We're all on tenterhooks.
NoBob asked a simple question you either don't understand or have resolution for. You
then assumed you knew more about Photoshop than him. First you got indignant that your attempt to to offer a workaround instead of an answer was denied and now you get sarcastic. Perhaps something like "Sorry about the mix-up NoBob, good luck with that warp tool." should be your next and last reply to NoBob's question.
Though I've just been reading the thread again, and I think maybe my use of 'low-res' was misleading. Through working with editors, I use it to mean small pics, rather than simply 72ppi. So, should have really said 'small pics', instead. Like 400 px along one side. In a small pic you're not going to appreciate the degree of distortion that's more obvious in a larger photo, and don't wish to post pics any larger, low-res (72ppi) or high-res (300ppi.) Apologies for that.
I just don't thinking posting the pic would help. Say you have three verticals (door, wall, table leg...) and each has a slightly different curvature, resulting from the lens distortion, the distort and skew just don't work. BubbaJon's blending idea is one way, but I already do a lot of layer duping and masking. Am looking for a faster way. The warp tool seems to me to be the best solution for correcting complex distortion, without the time-consuming workflow hastle of PTLens or LensFix, but the grid size isn't small enough to make small tweaks to the different curvature of lines in close proximity to each other.
WAYCOOL wrote:
NoBob asked a simple question you either don't understand or have resolution for. You
then assumed you knew more about Photoshop than him. First you got indignant that your attempt to to offer a workaround instead of an answer was denied and now you get sarcastic. Perhaps something like "Sorry about the mix-up NoBob, good luck with that warp tool." should be your next and last reply to NoBob's question.
Rant over.
The problem with ranting is that you get your facts wrong when you're hot under the collar. Better to cool down and post a more measured response.
Though I've just been reading the thread again, and I think maybe my use of 'low-res' was misleading. Through working with editors, I use it to mean small pics, rather than simply 72ppi. So, should have really said 'small pics', instead. Like 400 px along one side. In a small pic you're not going to appreciate the degree of distortion that's more obvious in a larger photo, and don't wish to post pics any larger, low-res (72ppi) or high-res (300ppi.) Apologies for that.
I just don't thinking posting the pic would help. Say you have three verticals (door, wall, table leg...) and each has a slightly different curvature, resulting from the lens distortion, the distort and skew just don't work. BubbaJon's blending idea is one way, but I already do a lot of layer duping and masking. Am looking for a faster way. The warp tool seems to me to be the best solution for correcting complex distortion, without the time-consuming workflow hastle of PTLens or LensFix, but the grid size isn't small enough to make small tweaks to the different curvature of lines in close proximity to each other....Show more →
Contrary to "waycool's" uncool retort, I don't assume that I know more than you about Photoshop. But I can tell from certain of your remarks about your attempts to solve this problem that you're thinking inside at least one box. I strongly suspect that there are ways to fix the sort of distortion you describe, but I can't be sure without seeing an image. The answer to your initial question is no, the grid in the warp tool can't be refined. Beyond that, what are you seeking in the way of help here?
That's fine. Question answered. Think I should get in touch with Adobe and put in a request for more control over the grid size in the next version of Photoshop...
http://www.creativepro.com/article/framed-and-exposed-adobe-photoshop-cs2
"I'd like to see a few additions to the Warp tool, such as the ability to save custom warp profiles. More importantly, though, I'd like to be able to increase the density of the Warp mesh. Currently, the Warp tool provides a 3x3 mesh. Being able to add additional control points would add a lot of power."
