[Hdri] correction for barrel distortion

[Paul LaBerge]

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 at www.radiance-online.org on behalf of Kirk Thibault
> Sent: Tue 1/17/2006 3:52 PM
> To: Hdri at 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 at 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 at biomechanicsinc.com]
>>> Sent: Tuesday, January 17, 2006 9:03 AM
>>> To: hdri at 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
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