Exporting JPEGs out of Lightroom3 to be projected on a screen

I export JPEG files via a Lightroom 3 preset to an email attachment and then to be projected on a screen.
The color space setting I use is sRBG. Is this setting the same as sRBGIEC61966-2.1 used in CS5? When projected, my images are soft while they are tack sharp in Lightroom 3 or CS5. A fellow member of my camer club thought that the export setting could be the problem and that he always used sRGBIEC61966-2.1 from Photoshop CS5. Any suggestions to resolve this problem?
rbg

That's the correct color profile for typical computer displays.
If you are using LR's built-in "email" preset for export - then that's your problem. This preset makes for small email attachments, but poor image quality. It deliberately scales your image size down to 640 x 480, which is just 0.3 mega-pixels (same resolution as bad cell-phone cams). It also compresses image quality to only 50%. No wonder they look bad when blown up large!
You should find out what resolution their projector runs at (typical sizes are 800x600, 1024x768, or 1280x1024). Export your pictures at that size or larger, and choose at least 80% quality setting or higher.

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Dear Friends,
I use Windows XP SP 2, Indesign CS 2 (Vers. 4.0.5).
I use the Indesign in-built jpeg export function very often because I need the output for some flash presentation (flash book).
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With best Regards

Well - but when the exported JPEG has to be small - then Photoshop rasters the fonts very unreadable. - Indesign is better in rastering the fonts when it is exporting the stuff directly as JPEG-Files. The font is much more readable then.
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If the pref file was damaged your test library would have exhibited problems also. Try the following:
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function(){return A.apply(null,[this].concat($A(arguments)))}
Larry G. Schneider wrote:
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Aperture Exporting JPEG's from RAW: file size and quality questions?

Hey Everyone,
So, I'm using Aperture 2 and I've got some questions about exporting from RAW to JPEG. I shoot with a Nikon D70 so original RAW files are 5-6mb in size. After doing some basic post processing when I export the pics at "full size" with picture quality of 11 out of 12 then the resulting JPEG is about half the file size of the original RAW file. For example a 5.6mb RAW becomes a 2.6mb JPEG. The resolution in pixels per inch and and the overall image size remain unchanged. Have I lost picture quality due to the exporting JPEG being smaller in file size?
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mscriv wrote:
So, I'm using Aperture 2 and I've got some questions about exporting from RAW to JPEG. I shoot with a Nikon D70 so original RAW files are 5-6mb in size. After doing some basic post processing when I export the pics at "full size" with picture quality of 11 out of 12 then the resulting JPEG is about half the file size of the original RAW file. For example a 5.6mb RAW becomes a 2.6mb JPEG. The resolution in pixels per inch and and the overall image size remain unchanged. Have I lost picture quality due to the exporting JPEG being smaller in file size?
JPEG is a "lossy" file compression algorithm. Whether Aperture or PS, *every time a JPEG is saved some loss occurs*, albeit minimal at the 11 or 12 level of save, huge losses at low save levels. Some images (sky, straight diagonal lines, etc.) are more vulnerable to showing visible jpeg artifacts.
My friend who works with me prefers to edit in Photoshop and when he follows the same workflow his saved JPEG from the identical RAW file in Photoshop is minimally smaller in file size, say 5.6mb to 5.3mb. He's telling me that my Aperture edited photos are losing quality and resolution.
*Both of you are losing image data when you save to jpeg.* IMO the differences between the apps is probably just how the apps work rather than actually losing significantly more data. The real image data loss is in using JPEG at all!
Is he right, are my pics of lesser quality due to being a smaller file size?
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I've always been told that the quality of a picture is not in the mbs, but the pixel density.
The issue here is not how many pixels (because you are not varying that) but how much data each pixel contains. In this case once you avoid lossy JPEG the quality mostly has to do with different RAW conversion algorithms. Apple and Adobe both guess what Nikon is up to with the proprietary RAW NEF files and the results are different from ACR to Apple to Nikon. For my D2x pix I like Nikon's conversions the best (but Nikon software is hard to use), Aperture second and Adobe ACR (what Photoshop/Bridge uses) third. I 98% use Aperture.
I tried changing the picture quality in the export menu to 12 out of 12, but the resulting JPEG then becomes larger than the original RAW at over 7mbs. Can someone please help me understand this better? I don't want to lose picture quality if that is indeed what is happening.
JPEG is a useful format but lossy. Only use it as a _last step_ when you must save files size for some reason and are willing to accept the by-definition loss of image data to obtain smaller files (such as for web work or other on-screen viewing). Otherwise (especially for printing) save as TIFF or PSD which are non-lossy file types, but larger.
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HTH
-Allen

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Just thought i might add that i have encountered this same problem and that if i want a high quality jpeg i save as pdf then, open and re-save as jpeg in photoshop.
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Exporting JPEGs out of Lightroom3 to be projected on a screen

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