Reducing bloat/opposite of fish-eye lens?

"Boppy" wrote in message

Hi, I’ve got a photo of a piece of artwork – tiles mounted in a wooden frame. It has come out looking as though it’s been taken with a fish- eye lens.

Obviously I could reconstruct it tile-by-tile but it would be much easier if I didn’t have to.

Is there an easy way to straighten it out? I’ve cropped it using the perspective option but it still bulges in the centre.

Here is the image cropped: http://i5.tinypic.com/435a1ic.jpg
Thanks in advance for advice.

Photoshop CS2 has a Lens Correction filter that will do this. —
Mike Russell
www.curvemeister.com/forum/

On Apr 6, 2:47 pm, "Mike Russell" <
MOVE> wrote:

"Boppy" wrote in message

Hi, I’ve got a photo of a piece of artwork – tiles mounted in a wooden frame. It has come out looking as though it’s been taken with a fish- eye lens.

Obviously I could reconstruct it tile-by-tile but it would be much easier if I didn’t have to.

Is there an easy way to straighten it out? I’ve cropped it using the perspective option but it still bulges in the centre.

Here is the image cropped:http://i5.tinypic.com/435a1ic.jpg

Thanks in advance for advice.

Photoshop CS2 has a Lens Correction filter that will do this. —
Mike Russellwww.curvemeister.com/forum/

Thanks Mike – sorted.

In article <rxiRh.5319$>, RE-
says…

"Boppy" wrote in message

Hi, I’ve got a photo of a piece of artwork – tiles mounted in a wooden frame. It has come out looking as though it’s been taken with a fish- eye lens.

Obviously I could reconstruct it tile-by-tile but it would be much easier if I didn’t have to.

Is there an easy way to straighten it out? I’ve cropped it using the perspective option but it still bulges in the centre.

Here is the image cropped: http://i5.tinypic.com/435a1ic.jpg
Thanks in advance for advice.

Photoshop CS2 has a Lens Correction filter that will do this. —
Mike Russell
www.curvemeister.com/forum/

Thanks Mike, I did not know that. I’ve used Andromeda’s LensDoc for anti-pin- cushion/barrel distortion. I guess like almost all of my older plug-ins, many find their way into PS, as some time. Old guys, such as myself, just grab for what they "grew up on," and do not explore all of the new filters with each release. I’ll have to play with it in a side-by-side and see if there are any/many differences between the two.

Hunt

(Hunt) wrote:

In article <rxiRh.5319$>, RE-
says…

"Boppy" wrote in message

Hi, I’ve got a photo of a piece of artwork – tiles mounted in a wooden frame. It has come out looking as though it’s been taken with a fish- eye lens.

Obviously I could reconstruct it tile-by-tile but it would be much easier if I didn’t have to.

Is there an easy way to straighten it out? I’ve cropped it using the perspective option but it still bulges in the centre.

Here is the image cropped: http://i5.tinypic.com/435a1ic.jpg
Thanks in advance for advice.

Photoshop CS2 has a Lens Correction filter that will do this. —
Mike Russell
www.curvemeister.com/forum/

Thanks Mike, I did not know that. I’ve used Andromeda’s LensDoc for anti-pin- cushion/barrel distortion. I guess like almost all of my older plug-ins, many find their way into PS, as some time. Old guys, such as myself, just grab for what they "grew up on," and do not explore all of the new filters with each release. I’ll have to play with it in a side-by-side and see if there are any/many differences between the two.

Hunt

I just have the chance to look at the image and I can say that Photoshop (at least CS2) has quite afew option to correct lens distortion.

– It has built-in few plug-ins for lens adjusting

– Hmmm I don’t remember all the options but I think the Skrew or free-hand etc. should be able to straighten the image.

The Photoshop lens correction filter is very week. If you have a strong fisheye effect it will trash the image long before it corrects it. You can use something like Andromeda’s LensDoc 3.0 or you can try the Filters > Distort > Spherize filter with negative amounts. I would run a test run of this filter to find out how much you need, then undo it and apply the amount in 3rds (apply 1/3 of the total amount needed three times.) I find this gives a smoother result than doing it all in one step.

=(8)

In article <461849a3$0$14080$ says…

The Photoshop lens correction filter is very week. If you have a strong fisheye effect it will trash the image long before it corrects it. You can use something like Andromeda’s LensDoc 3.0 or you can try the Filters > Distort > Spherize filter with negative amounts. I would run a test run of this filter to find out how much you need, then undo it and apply the amount in 3rds (apply 1/3 of the total amount needed three times.) I find this gives a smoother result than doing it all in one step.

=(8)

Further to that – this will work pretty well in your case. To avoid distortion at the edges you need to enlarge the
canvas (keeping your image in the centre of the canvas). Approximately doubling the width and then setting the height
to the same (so you have a square canvas) should be enough. Then around -10% spherise should do it.

Mike