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Photography Question 
Anthony Arendt
 

file conversion in photoshop


When I scan an image into Adobe Photo Shop and am finished working on the file I save it as a tiff. When I want to post the image onto my website, I duplicate the file, resize it and try and save it as a jpeg file. The problem I am having is somewhere along the way the file is being corrupted. anytime I try and open the file with any other application except APS, I get error messages. Cannot open the file at all....Any suggestions how to convert a tiff into a jpeg for omline use?


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11/26/2003 9:35:52 AM

 
doug Nelson   It sounds to me as if you're doing it right, Anthony. If you are using Adjustment Layers or Layers, are you flattening the image first? If you scan in high-bit (12 or more bits per each RGB color), are you doing the tonal correction and then switching to 8-bit RGB color in Image Mode? Are you downsizing the JPEG to low res (72 or so ppi) AND sizing the pixels dimensions to screen size? If these factors are OK, it's a real mystery. Somebody tell us it's something simple . . .


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11/26/2003 11:03:09 AM

 
Anthony Arendt   Thanks for the reply. I am not using any layers. just cleaning dust and hairs, and minor color corrections. I am not using asny layers, since I dont know how to do that yet. I think its scanning in 24bit rgb. I am not switching to 8-bitRGB in Image Mode.Should I?. I am downsizing the image to 150 dpi from a huge 200mb file.I am sizing the new image in inches, thought the pixels would adjust themselves. Does this sound like I might be doing something wrong?
What is flattening the image mean?

Thank you for your time...


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11/26/2003 2:23:28 PM

 
doug Nelson   OK, layers and flattening don't apply to you. Don't worry about going to 8-bit, as it seems you are already in 8-bit. Check Image/Image Mode and see.

It's a mystery to me how you get a 200MB file from a scan. Scanner ad copy tells you the thing will do 9600 ppi. That super high figure is ad hype. My Toyota might go 150 mph, but not for very long. You'd be better off telling the scanner to scan at 150 ppi, no more than 300. That way, the file size won't be so huge. To change to JPEG, go to Image/Image Size, CHECK Resample and enter 72 in the res block and about 750 for the long dimension, if a horizontal, and 600 for the height, if a vertical. Click OK. Then SAVE AS a JPEG. When it asks for a Quality setting, give it about a 9.


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11/28/2003 9:18:32 AM

 
Anthony Arendt   Thank you doug for responding doug.

First off doug to make 30 x40 and above prints at 300 ppi with gallery print results, you need files this big. I dont know how your scanning, but for most pro/consumer photo flatbeds, this is a simple task.
This is not ad hype, but simple arithmetic. Hope this unraveled your mystery a little bit.

As for my problem with changing from a tiff to a corrupted jpeg,I need info on photoshop that is more than 101, but thanks anyway for trying .

PS. What Toyota goes 150mph?


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11/28/2003 9:41:51 AM

 
doug Nelson   Anthony,
I made some assumptions I shouldn't have, that I could have avoided had I gone to your web page earlier. It is clear that you know what you're doing. Your landscapes are stunning.
My math breaks down to 300 ppi times a 40-inch image length. That's a 12,000 ppi scan.
Scanners have a listed resolution, such as 2400 x 4800. I'd normally use the smaller of the two figures as the max image length (explained at scantips.com). Scanner makers also offer a larger resolution figure, an interpolated resolution. It's always way, way up there. That's usually because the software adds pixels, based on neighboring pixels to boost the resolution.
At least one reader here boosts the basic scan res in Photoshop in steps of 10% at a time. Others use Genuine Fractals for resolution boosting.
If you're selling your prints, someone is quite satisfied with your print quality. How are you pulling this off, if you don't mind sharing your technique?


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11/30/2003 6:45:12 AM

 
Anthony Arendt   Doug,
Thank you for your kind words. I have recently aquired a stock photo agent that will represent me not only in stock sales but large fineart photographs geared toward the corporate office, and ad clients. They deal exclusively in digital files which I was not very savy with. Since then, I have purchased a new computer, and scanner to properly digitize my film.
They require large files because they are making print sizes from 20 x 30 up and beyond 6 feet across. So I clean up my digitized scans in photoshop, then send them to my agent.
What he turned me onto was a company that he uses called pictopia.com. he, and now I send them a digital file with an FTP Client, they keep it on there server under your account. Anytime you want to make a print it as as simple as a few key strokes. The quality looks as good as any ilfochrome classic that I have ever seen. I dont know how long they last, but they are spectacular. I just sold a 40x50 print to Harrison Ford ( no name dropping) and I was blown away by the quality. Much of my sales are really large fine art prints. You know how expensive they can be to print and frame, leaving the artist with not much more than a little more exposure. With Pictopia.com I am able to actually make 60% more than what I was with the same visual impact. If you go to there sight, they have a great technical page explaining there process. My whole goal is to stay in the field, where my passion lies. With Pictopia I am able to spend more time in the field where I belong and less time in the office or lab.


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11/30/2003 10:25:38 AM

 
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