Half-size raw in light table
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Hi all,
When I open one or more raw images on the light table, a "Half Size Raw Preview" is shown. I have digiKam configured to load the full-size image under the Light Table settings, but only the half-size is ever loaded. Currently using digiKam 1.4, but this behaviour was the same in 1.2. How can I force the full-size image to be loaded and displayed on the light table?
Thanks, Gys
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Re: Half-size raw in light table
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on Monday 11 October 2010, Gys van Zyl wrote:
> Hi all, > > When I open one or more raw images on the light table, a "Half Size Raw > Preview" is shown. I have digiKam configured to load the full-size image > under the Light Table settings, but only the half-size is ever loaded. > Currently using digiKam 1.4, but this behaviour was the same in 1.2. How > can I force the full-size image to be loaded and displayed on the light > table? > > Thanks, > Gys > afaik, the preview shown is the jpeg image embedded in the RAW file, showing a full size image would require developping the RAW file, which is relatively slow, and might not give a decent image at that (what settings should the light table use?) regards, Remco _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: Half-size raw in light table
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The full size raw preview whant mean raw image data decoded quickly
using a reduced raw image size (full size/4 in fact) and in this case, raw preview is not JPEG embeded preview. It's the same for Preview mode (F3), using album icon view. Gilles Caulier 2010/10/11 Remco Viëtor <[hidden email]>: > on Monday 11 October 2010, Gys van Zyl wrote: >> Hi all, >> >> When I open one or more raw images on the light table, a "Half Size Raw >> Preview" is shown. I have digiKam configured to load the full-size image >> under the Light Table settings, but only the half-size is ever loaded. >> Currently using digiKam 1.4, but this behaviour was the same in 1.2. How >> can I force the full-size image to be loaded and displayed on the light >> table? >> >> Thanks, >> Gys >> > I don't think you can show a full size RAW preview: > afaik, the preview shown is the jpeg image embedded in the RAW file, showing a > full size image would require developping the RAW file, which is relatively > slow, and might not give a decent image at that (what settings should the > light table use?) > > regards, > Remco > > _______________________________________________ > Digikam-users mailing list > [hidden email] > https://mail.kde.org/mailman/listinfo/digikam-users > Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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I'm not sure I understand what you're saying - do you mean that this is intentional behaviour as it's quicker to show a half-size raw than the full size?
I'm happy that the preview mode shows the embedded jpeg - this makes sense because normally I just want to quickly run through the images to weed out the poor ones or find the one I'm looking for. However, I use the light table to make careful selections between two similar images. For instance I'll use the light table to select which image has the best focus in a series of images of a specific macro subject. For this reason I specifically want the full size raw, not the half-size - I'm checking the fine details. I don't care that it takes long, I'm not using this for every image, just the ones I'm really interested in.
Is it impossible to get the full size raw on the light table? Gys
On Mon, Oct 11, 2010 at 3:56 PM, Gilles Caulier <[hidden email]> wrote: The full size raw preview whant mean raw image data decoded quickly _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: Half-size raw in light table
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2010/10/11 Gys van Zyl <[hidden email]>:
> I'm not sure I understand what you're saying - do you mean that this is > intentional behaviour as it's quicker to show a half-size raw than the full > size? > I'm happy that the preview mode shows the embedded jpeg - this makes sense > because normally I just want to quickly run through the images to weed out > the poor ones or find the one I'm looking for. However, I use the light > table to make careful selections between two similar images. For instance > I'll use the light table to select which image has the best focus in a > series of images of a specific macro subject. For this reason I > specifically want the full size raw, not the half-size - I'm checking the > fine details. I don't care that it takes long, I'm not using this for every > image, just the ones I'm really interested in. > Is it impossible to get the full size raw on the light table? no because it take a while. decoding half size raw is faster. Of course using JPEG embedded is very fast (less than one second). To compare with ARW files, half raw size take 5~10s, and full raw size take 15~20s (loaded in editor) These tile can change accordingly with RAW decoding settings, as NR for example. Of course, if you libkdcraw is compiled with parallel demosaicing (OpenMP support), it will be faster. Gilles Caulier > Gys > > On Mon, Oct 11, 2010 at 3:56 PM, Gilles Caulier <[hidden email]> > wrote: >> >> The full size raw preview whant mean raw image data decoded quickly >> using a reduced raw image size (full size/4 in fact) >> >> and in this case, raw preview is not JPEG embeded preview. >> >> It's the same for Preview mode (F3), using album icon view. >> >> Gilles Caulier >> >> 2010/10/11 Remco Viëtor <[hidden email]>: >> > on Monday 11 October 2010, Gys van Zyl wrote: >> >> Hi all, >> >> >> >> When I open one or more raw images on the light table, a "Half Size Raw >> >> Preview" is shown. I have digiKam configured to load the full-size >> >> image >> >> under the Light Table settings, but only the half-size is ever loaded. >> >> Currently using digiKam 1.4, but this behaviour was the same in 1.2. >> >> How >> >> can I force the full-size image to be loaded and displayed on the light >> >> table? >> >> >> >> Thanks, >> >> Gys >> >> >> > I don't think you can show a full size RAW preview: >> > afaik, the preview shown is the jpeg image embedded in the RAW file, >> > showing a >> > full size image would require developping the RAW file, which is >> > relatively >> > slow, and might not give a decent image at that (what settings should >> > the >> > light table use?) >> > >> > regards, >> > Remco >> > >> > _______________________________________________ >> > Digikam-users mailing list >> > [hidden email] >> > https://mail.kde.org/mailman/listinfo/digikam-users >> > >> _______________________________________________ >> Digikam-users mailing list >> [hidden email] >> https://mail.kde.org/mailman/listinfo/digikam-users > > > _______________________________________________ > Digikam-users mailing list > [hidden email] > https://mail.kde.org/mailman/listinfo/digikam-users > > Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: Half-size raw in light table
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In reply to this post by Gys van Zyl
> I'm not sure I understand what you're saying - do you mean that this is > intentional behaviour as it's quicker to show a half-size raw than the full > size? > > I'm happy that the preview mode shows the embedded jpeg - this makes sense > because normally I just want to quickly run through the images to weed out > the poor ones or find the one I'm looking for. However, I use the light > table to make careful selections between two similar images. For instance > I'll use the light table to select which image has the best focus in a > series of images of a specific macro subject. For this reason I > specifically want the full size raw, not the half-size - I'm checking the > fine details. I don't care that it takes long, I'm not using this for > every image, just the ones I'm really interested in. > > Is it impossible to get the full size raw on the light table? Currently, yes. If you think of what data a raw image contains http://en.wikipedia.org/wiki/Demosaicing you'll see that the half-size preview is not really the full image cut by half, but rather to a large portion the full data available, not interpolated to full size. (nonetheless there will be users like you who really want full size, I can understand that wish) Marcel _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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