Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
Martin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic aberration, vignetting and barrel/pincushion distortion.
Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option was not available, leading me to believe that it will not operate directly on HDR 32 bit images. Thus, it would seem that you would apply it to your LDR sequence images before converting to a HDR image. The filter permits the applied settings to be saved, so you could open one image, applying the correction and then save the settings for the subsequent application to the rest of the image sequence, permitting automation in a batch action. If your sequence is taken with a tripod and the images are registered prior to correction, I would guess that applying the same correction through saved settings should displace the same pixels in each image and preserve image registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
I could be wrong, but don't HDR creators need the original camera shot with
exif information? Doing Photoshop adjustments would lose that info. I'm
pretty sure Photosphere needs this, but I don't know if HDRShop does.
Rob F
-----Original Message-----
From: Kirk Thibault [mailto:kthibault@biomechanicsinc.com]
Sent: Tuesday, January 17, 2006 9:03 AM
To: hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortion
Martin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic
aberration, vignetting and barrel/pincushion distortion.
Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option
was not available, leading me to believe that it will not operate directly
on HDR 32 bit images. Thus, it would seem that you would apply it to your
LDR sequence images before converting to a HDR image. The filter permits
the applied settings to be saved, so you could open one image, applying the
correction and then save the settings for the subsequent application to the
rest of the image sequence, permitting automation in a batch action. If
your sequence is taken with a tripod and the images are registered prior to
correction, I would guess that applying the same correction through saved
settings should displace the same pixels in each image and preserve image
registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
<http://www.dcresource.com/reviews/nikon/coolpix5400-review/>
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images
before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel
distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org <http://www.radiance-online.org>
http://www.radiance-online.org/mailman/listinfo/hdri
<http://www.radiance-online.org/mailman/listinfo/hdri>
Hi Rob - FWIW, I've never had a problem with Photoshop stripping this info - EXIF is kept intact. Good point to consider though.
------------------------------
Kirk L. Thibault, Ph.D.
kthibault@biomechanicsinc.com
p. 215.271.7720
f. 215.271.7740
c. 267.918.6908
skype. kirkthibault
On Jan 17, 2006, at 1:38 PM, Fitzsimmons, Rob wrote:
I could be wrong, but don't HDR creators need the original camera shot with exif information? Doing Photoshop adjustments would lose that info. I'm pretty sure Photosphere needs this, but I don't know if HDRShop does.
Rob F
-----Original Message-----
From: Kirk Thibault [mailto:kthibault@biomechanicsinc.com]
Sent: Tuesday, January 17, 2006 9:03 AM
To: hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortionMartin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic aberration, vignetting and barrel/pincushion distortion. >>Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option was not available, leading me to believe that it will not operate directly on HDR 32 bit images. Thus, it would seem that you would apply it to your LDR sequence images before converting to a HDR image. The filter permits the applied settings to be saved, so you could open one image, applying the correction and then save the settings for the subsequent application to the rest of the image sequence, permitting automation in a batch action. If your sequence is taken with a tripod and the images are registered prior to correction, I would guess that applying the same correction through saved settings should displace the same pixels in each image and preserve image registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
I suppose that if you alter the image, the EXIF info will be wiped.
------------------------------
Kirk L. Thibault, Ph.D.
kthibault@biomechanicsinc.com
p. 215.271.7720
f. 215.271.7740
c. 267.918.6908
skype. kirkthibault
On Jan 17, 2006, at 1:38 PM, Fitzsimmons, Rob wrote:
I could be wrong, but don't HDR creators need the original camera shot with exif information? Doing Photoshop adjustments would lose that info. I'm pretty sure Photosphere needs this, but I don't know if HDRShop does.
Rob F
-----Original Message-----
From: Kirk Thibault [mailto:kthibault@biomechanicsinc.com]
Sent: Tuesday, January 17, 2006 9:03 AM
To: hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortionMartin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic aberration, vignetting and barrel/pincushion distortion. >>Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option was not available, leading me to believe that it will not operate directly on HDR 32 bit images. Thus, it would seem that you would apply it to your LDR sequence images before converting to a HDR image. The filter permits the applied settings to be saved, so you could open one image, applying the correction and then save the settings for the subsequent application to the rest of the image sequence, permitting automation in a batch action. If your sequence is taken with a tripod and the images are registered prior to correction, I would guess that applying the same correction through saved settings should displace the same pixels in each image and preserve image registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
HDRShop will permit you to manually specify the exposure increment between each image in a LDR sequence.
------------------------------
Kirk L. Thibault, Ph.D.
kthibault@biomechanicsinc.com
p. 215.271.7720
f. 215.271.7740
c. 267.918.6908
skype. kirkthibault
On Jan 17, 2006, at 1:38 PM, Fitzsimmons, Rob wrote:
I could be wrong, but don't HDR creators need the original camera shot with exif information? Doing Photoshop adjustments would lose that info. I'm pretty sure Photosphere needs this, but I don't know if HDRShop does.
Rob F
-----Original Message-----
From: Kirk Thibault [mailto:kthibault@biomechanicsinc.com]
Sent: Tuesday, January 17, 2006 9:03 AM
To: hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortionMartin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic aberration, vignetting and barrel/pincushion distortion. >>Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option was not available, leading me to believe that it will not operate directly on HDR 32 bit images. Thus, it would seem that you would apply it to your LDR sequence images before converting to a HDR image. The filter permits the applied settings to be saved, so you could open one image, applying the correction and then save the settings for the subsequent application to the rest of the image sequence, permitting automation in a batch action. If your sequence is taken with a tripod and the images are registered prior to correction, I would guess that applying the same correction through saved settings should displace the same pixels in each image and preserve image registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
No luck with Photoshop lens corrections. This is like poor freehand drawing. All gridlines are not vertical or horizontal, but warped in interesting ways.
Each square with barrel distortion has to be corrected individually. Greg needs to do take care of this right now 
This community needs a tool to shift pixels in a Radiance image around. Input could be a black and white grid image showing the barrel distortion. Output would be the image with straight lines.
Greg, I can help you with the command line :
pcomb -f barrel.cal barrelgrid.pic original.hdr > corrected.hdr
See, Greg, we are already halfway there
Martin
________________________________
From: hdri-bounces@www.radiance-online.org on behalf of Kirk Thibault
Sent: Tue 1/17/2006 3:52 PM
To: Hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortion
HDRShop will permit you to manually specify the exposure increment between each image in a LDR sequence.
------------------------------
Kirk L. Thibault, Ph.D.
kthibault@biomechanicsinc.com
p. 215.271.7720
f. 215.271.7740
c. 267.918.6908
skype. kirkthibault
On Jan 17, 2006, at 1:38 PM, Fitzsimmons, Rob wrote:
I could be wrong, but don't HDR creators need the original camera shot with exif information? Doing Photoshop adjustments would lose that info. I'm pretty sure Photosphere needs this, but I don't know if HDRShop does.
Rob F
-----Original Message-----
From: Kirk Thibault [mailto:kthibault@biomechanicsinc.com]
Sent: Tuesday, January 17, 2006 9:03 AM
To: hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortion
Martin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic aberration, vignetting and barrel/pincushion distortion. Filter>Distortion>Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option was not available, leading me to believe that it will not operate directly on HDR 32 bit images. Thus, it would seem that you would apply it to your LDR sequence images before converting to a HDR image. The filter permits the applied settings to be saved, so you could open one image, applying the correction and then save the settings for the subsequent application to the rest of the image sequence, permitting automation in a batch action. If your sequence is taken with a tripod and the images are registered prior to correction, I would guess that applying the same correction through saved settings should displace the same pixels in each image and preserve image registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
Has anyone tried "LensFix & PanoTools Plug-ins for OSX" ?
I haven't had much of a chance to try it but have heard good things about it.
I have a product description if that is of use.
Paul
No luck with Photoshop lens corrections. This is like poor freehand drawing. All gridlines are not vertical or horizontal, but warped in interesting ways.
Each square with barrel distortion has to be corrected individually. Greg needs to do take care of this right now
This community needs a tool to shift pixels in a Radiance image around. Input could be a black and white grid image showing the barrel distortion. Output would be the image with straight lines.
Greg, I can help you with the command line
pcomb -f barrel.cal barrelgrid.pic original.hdr > corrected.hdr
See, Greg, we are already halfway there
Martin
From: hdri-bounces@www.radiance-online.org on behalf of Kirk Thibault
Sent: Tue 1/17/2006 3:52 PM
To: Hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortionHDRShop will permit you to manually specify the exposure increment between each image in a LDR sequence.
------------------------------Kirk L. Thibault, Ph.D.
kthibault@biomechanicsinc.comp. 215.271.7720
f. 215.271.7740
c. 267.918.6908skype. kirkthibault
On Jan 17, 2006, at 1:38 PM, Fitzsimmons, Rob wrote:
I could be wrong, but don't HDR creators need the original camera shot with exif information? Doing Photoshop adjustments would lose that info. I'm pretty sure Photosphere needs this, but I don't know if HDRShop does.
Rob F
-----Original Message-----
From: Kirk Thibault [mailto:kthibault@biomechanicsinc.com]
Sent: Tuesday, January 17, 2006 9:03 AM
To: hdri@www.radiance-online.org
Subject: Re: [Hdri] correction for barrel distortionMartin,
Photoshop CS2 has a Lens Correction filter that will help correct chromatic aberration, vignetting and barrel/pincushion distortion. >>Lens Correction
However, I opened a HDR image (*.hdr) and the Filter>Distortion menu option was not available, leading me to believe that it will not operate directly on HDR 32 bit images. Thus, it would seem that you would apply it to your LDR sequence images before converting to a HDR image. The filter permits the applied settings to be saved, so you could open one image, applying the correction and then save the settings for the subsequent application to the rest of the image sequence, permitting automation in a batch action. If your sequence is taken with a tripod and the images are registered prior to correction, I would guess that applying the same correction through saved settings should displace the same pixels in each image and preserve image registration.
I just upgraded to CS2 so I haven't played with it yet.
kirk
On Jan 17, 2006, at 10:11 AM, Martin Moeck wrote:
Assume you have a barrel distortion image like the one shown at
http://www.dcresource.com/reviews/nikon/coolpix5400-review/
towards the bottom of the page.
1) Are there software tools or algorithms available to correct these images before they are converted into an HDR image?
2) If not, is there a simple way to correct the HDR image for barrel distortion?
Martin Moeck
_______________________________________________
Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri_______________________________________________Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri_______________________________________________Hdri mailing list
Hdri@www.radiance-online.org
http://www.radiance-online.org/mailman/listinfo/hdri
Haha. Very funny, indeed!
I just tried the lens warp with Photoshop CS2 on my Mac, and it did preserve the Exif information, so I think that process could work.
Pcomb does support limited filtering, which could include some warping, but you have to keep the scans within 32 pixels of each other (or so), and that might be a problem. You would also want to implement a bicubic filter, I suppose.
-Greg
From: "Martin Moeck" <MMoeck@engr.psu.edu>
Date: January 17, 2006 1:40:26 PM PSTNo luck with Photoshop lens corrections. This is like poor freehand drawing. All gridlines are not vertical or horizontal, but warped in interesting ways.
Each square with barrel distortion has to be corrected individually. Greg needs to do take care of this right now
Greg, I can help you with the command line
pcomb -f barrel.cal barrelgrid.pic original.hdr > corrected.hdr
See, Greg, we are already halfway there
Martin
The GIMP image manipulation package is available for OSX, and there are a
number of interesting plug-ins, including barrel distortion. Dunno if the
EXIF info is kept, but if not, you may just save it to a text file and
re-create an appropriate EXIF header once the dirty jobs are done.
There is also Hugin, a tool for stitiching panoramas. See here:
http://hugin.sourceforge.net/tutorials/perspective/en.shtml
how you can use it to correct barrel distortion. This is kinda
extreme-unbarrelling, though...
Axel
..., and see down at the bottom of this page:
for more distortion correcting software. There is a Photoshop plug-in, too
Axel
Sorry--link included now
..., and see down at the bottom of this page:
http://www.panotools.info/mediawiki/index.php?title=Lens_correction_model
for more distortion correcting software. There is a Photoshop plug-in, too
Axel
Sorry--link included now
..., and see down at the bottom of this page:
http://www.panotools.info/mediawiki/index.php?title=Lens_correction_model
for more distortion correcting software. There is a Photoshop plug-in, too
Axel