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04/03/2006 08:48:39 AM · #1 |
Hello everyone,
My photos haven't passed Alamy's Quality Control because "they appear soft with jaggies". The photos I sent were around 1.6mb jpeg's interpolated to 55-60mb tiffs. It took me ages to interpolate them using Photoshop CS because unless I save a photo after upsizing, I have no way of knowing how many mega bytes there are. Can someone explain it to me step by step how to interpolate 1.6mb photos to 48mb, I would really appreciate it. Cheers! |
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04/03/2006 09:17:03 AM · #2 |
Doing this from memory...
Open the jpg, and save it as a tif file. Now, in the lower left corner of the PS window in a small status bar area it will show the file size, like 16MB or some such. (Shows it with the jpg too I believe.) Each time you upsize it, this small status bar number will change showing the file size. And since tif is lossless, it doesn't matter how many times you save-exit-and-re-open the file if you need to for some reason.
Hope that helps. And hope I remembered it right...
I use the "resize pro" plugins from fredmiranda.com to upsize. They seem to do a great job, and you can upsize it all in one jump.
Doug
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04/03/2006 09:27:31 AM · #3 |
Right now I have a photo opened and what I see in the lower left corner of the PS window is 93.2M. But when I go to Finder the same photo is 30.6MB. Don't understand why isn't it all in mb.
Can I also just confirm with you that when you are upsizing, you don't get get desired size first time around and so you try again and again untill you reach lets say 48mb.
Thanks |
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04/03/2006 10:36:38 AM · #4 |
I believe the figure you are talking about is the size it would be if saved as a PSD, it doesn't store the information of different file type saves. In PS go to window/file explorer and this will give you the information that you need.
How long was the turn around from taking your files to telling you that they weren't accepting them.... I was thinking about making up a CD.
cheers
Keith |
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04/03/2006 10:56:49 AM · #5 |
| It took Alamy five days from the day they received it to notify me. Thanks |
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04/03/2006 11:13:29 AM · #6 |
The size shown where dswebb describes is the number of pixels - so for example a 1000x1000 8-bit image (with 8 bits - 1 byte - per colour channel) will show a size of 1000x1000x3(channels) or around 3.0M. Well actually 2.86M because Photoshop treats 1,048,576 bytes as 1M rather than 1,000,000.
Now then, Alamy wants 48Mb 8-bit tiff files; first thing to remember is that this is the UNCOMPRESSED size. If you're turning on LZW compression when you save them (I'd recommend it, fit more on a CD that way!) they'll only be 20-25Mb in Windows Explorer.
So, 48Mb 8-bit tiffs means you want "48M" (or higher) showing where dswebb has explained. If PS is quoting a figure of 93.2M then you've either massively oversized them, or possibly you've ended up in 16-bit colour mode (unlikely from your description).
For what it's worth, no I don't use trial and error - you're aiming for a 48M tiff, which means 16M pixel (3 bytes per pixel). As an example, a random photo I just opened is currently at 3056x2296 pixels, which comes to 7M pixels or so. To upsize for Alamy I'd need to increase that to something like 4725x3550 (16.7M pixels, or around 48M by the way PS measures it).
I hope that makes some sort of sense; in a way I'm still using trial and error but rather than upsizing a little bit, saving it and then looking I just look at the pixel size and grab a calculator! |
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04/03/2006 05:41:13 PM · #7 |
| That's great, thank you so much |
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