DCRaw pink images

[ray]

I have been successfully using DCraw on my own computer, but I have a problem now. When I download DCraw onto a new computer and transfer the raw Canon CR2 images (downloaded on my computer) to the new computer to work with ImageJ, the pictures are bright pink when I open them with DCraw in ImageJ. This happens when I use an external hard drive, thumb drive, CD. We have checked and everything is the same on the new computer (Windows XP professional, ImageJ 1.45k, DCraw 1.2.) Any ideas? Thanks, Russ

[Jarek Sacha-2]

On 7/20/2011 1:58 PM, ray wrote:
> I have been successfully using DCraw on my own computer, but I have a problem
> now. When I download DCraw onto a new computer and transfer the raw Canon
> CR2 images (downloaded on my computer) to the new computer to work with
> ImageJ, the pictures are bright pink when I open them with DCraw in ImageJ.
> This happens when I use an external hard drive, thumb drive, CD. We have
> checked and everything is the same on the new computer (Windows XP
> professional, ImageJ 1.45k, DCraw 1.2.) Any ideas? Thanks, Russ
I assume you are using the ij-dcraw plugin. Can you provide some more
details?
Are you loading images as 8 bit? If you are loading as 16 bit images may
look "strange".
What is the Canon camera model that acquired the images. If is one of
the new cameras you may need to update dcraw.exe to newer one that
supports you camera model. I may update release at
http://ij-plugins.sf.net to newest dcraw.exe in a couple of days.

Jarek

[Rgreenberg]

Thanks Jarek

Details -- I am using ij-dcraw version 1.2  I have also gone back and tried 1.1
I am using ImageJ 1.45k.  The camera is Canon Rebel XSi - so not a new camera.
I am uploading pictures as 8-bit.  As I said. I do this on my own computer (and have for a year now) and it all works perfectly.  I do the same thing on any other computer ( have tried 3) and either transport the images on an external hard drive or jump drive or download from our network drive and the images a completely color distorted.  I tried adjusting the color
and I can get the images to not be washed in pink, but the color values are grossly distorted on the calibration cards.

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Jarek Sacha
Sent: Wednesday, July 20, 2011 10:13 PM
To: [hidden email]
Subject: Re: DCRaw pink images

On 7/20/2011 1:58 PM, ray wrote:
> I have been successfully using DCraw on my own computer, but I have a problem
> now. When I download DCraw onto a new computer and transfer the raw Canon
> CR2 images (downloaded on my computer) to the new computer to work with
> ImageJ, the pictures are bright pink when I open them with DCraw in ImageJ.
> This happens when I use an external hard drive, thumb drive, CD. We have
> checked and everything is the same on the new computer (Windows XP
> professional, ImageJ 1.45k, DCraw 1.2.) Any ideas? Thanks, Russ
I assume you are using the ij-dcraw plugin. Can you provide some more
details?
Are you loading images as 8 bit? If you are loading as 16 bit images may
look "strange".
What is the Canon camera model that acquired the images. If is one of
the new cameras you may need to update dcraw.exe to newer one that
supports you camera model. I may update release at
http://ij-plugins.sf.net to newest dcraw.exe in a couple of days.

Jarek

[Jarek Sacha-2]

I assume that on all computers you use dcraw.exe that come with the ij-dcraw
plugin.

My suspicion is that you have somehow a different setup of ImageJ on those
computers. In particular loading of ppm files is different. Internally,
dcraw.exe converts a raw file to ppm, ImageJ loads ppm using IJ.open(). This
may pickup a plugin to loads ppm rather than default ImageJ reader. You can
test it by tricking ij-dcraw plugin into not deleting ppm file after
conversion. Create a copy of your raw file and change its extension to ppm,
both the original and the copy needs to be in the same directory. You will
have, say img_9876.cr2 and img_9876.ppm next to each other. Now use ij-dcraw
to read the file img_9876.cr2 it will replace img_9876.ppm with converted
ppm version, and since it already existed it will not delete it. Now try to
open this ppm file on different computers and see what you get. If it look
still different it is a problem with ImageJ installation. If it looks the
same the issue is with dcraw.exe, thou this would be something quite
strange.

On Thu, Jul 21, 2011 at 8:12 AM, Greenberg, Russell <[hidden email]>wrote:

> Thanks Jarek
>
> Details -- I am using ij-dcraw version 1.2  I have also gone back and tried
> 1.1
> I am using ImageJ 1.45k.  The camera is Canon Rebel XSi - so not a new
> camera.
> I am uploading pictures as 8-bit.  As I said. I do this on my own computer
> (and have for a year now) and it all works perfectly.  I do the same thing
> on any other computer ( have tried 3) and either transport the images on an
> external hard drive or jump drive or download from our network drive and the
> images a completely color distorted.  I tried adjusting the color
> and I can get the images to not be washed in pink, but the color values are
> grossly distorted on the calibration cards.
>
> -----Original Message-----
> From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of
> Jarek Sacha
> Sent: Wednesday, July 20, 2011 10:13 PM
> To: [hidden email]
> Subject: Re: DCRaw pink images
>
> On 7/20/2011 1:58 PM, ray wrote:
> > I have been successfully using DCraw on my own computer, but I have a
> problem
> > now. When I download DCraw onto a new computer and transfer the raw Canon
> > CR2 images (downloaded on my computer) to the new computer to work with
> > ImageJ, the pictures are bright pink when I open them with DCraw in
> ImageJ.
> > This happens when I use an external hard drive, thumb drive, CD. We have
> > checked and everything is the same on the new computer (Windows XP
> > professional, ImageJ 1.45k, DCraw 1.2.) Any ideas? Thanks, Russ
> I assume you are using the ij-dcraw plugin. Can you provide some more
> details?
> Are you loading images as 8 bit? If you are loading as 16 bit images may
> look "strange".
> What is the Canon camera model that acquired the images. If is one of
> the new cameras you may need to update dcraw.exe to newer one that
> supports you camera model. I may update release at
> http://ij-plugins.sf.net to newest dcraw.exe in a couple of days.
>
> Jarek
>