James,
What happens when you "Save As" jpg, and then put the quality slider at maximum?
It can’t get better than that, or I don’t understand the question.
Rob
James,
Make sure the Stock agency doesn’t mean 48MB minimum UNCOMPRESSED size, that is, the size of the file when opened – you can check this in the status bar of Photoshop (bottom of screen). If its 48MB compressed, you may need to upsample your file.
Thanks for your replies. I tried the quality slider but that does not get me far enough. They are asking for 48 MB as a minimum, uncompressed. I am trying to save the file as a TIFF before increasing the image size, then saving to JPG, but it is still only getting to 1 MB. I must be missing something.
I start out with RAW and when going to PS, it goes to DNG (I convert). Then I change to TIFF. Otherwise, after I work on the DNG, I usually saved as PSD.
Load your raw file into Photoshop.
Select Info and you will see the uncompressed size.
If this is less than or greater than required you could use this script to select the required MegaBytes.
var SizeOfFile = prompt("Please Enter Size In Megabytes",48)
if (SizeOfFile > 0) resizeToMB( SizeOfFile );
function resizeToMB( size_in_MB ) {
var current_units = preferences.rulerUnits;
preferences.rulerUnits = Units.PIXELS;
var width_pixels = activeDocument.width;
var height_pixels = activeDocument.height;
var channel_count = activeDocument.channels.length;
var final_size = ( 1024 * 1024 * size_in_MB ) / channel_count;
var image_bytes = width_pixels * height_pixels;
var image_scale = Math.sqrt( final_size/ image_bytes );
var final_width = width_pixels * image_scale;
var final_height = height_pixels * image_scale;
var final_dpi = activeDocument.resolution;
if ( image_scale > 1 ) {
activeDocument.resizeImage( final_width, final_height, final_dpi, ResampleMethod.BICUBICSMOOTHER );
} else {
activeDocument.resizeImage( final_width, final_height, final_dpi, ResampleMethod.BICUBICSHARPER );
}
preferences.rulerUnits = current_units;
}
Thanks anyway. This suddenly got way over my head.
Why do stock agencies demand a minimum MegaBytes instead of a minimum MegaPixels?
Camera Raw file sizes can vary very much due to lossless compression (blown-out skies to 255)
Rob
I am trying to send pictures to Alamy.com. A friend of mine uses it and says its an OK stock agency to use. I looked again at their requirements and they do say MB. I tried using the steps my friend used with hers, to "uprez", but I could not get my images to increase enough. Like I said earlier, I am probably just missing a simple step. I will continue reading etc and try and fix this.
But thanks again to everyone for your time!
Look at my post above. When you have your file open in Photoshop (8-bit), look at the bottom om the screen at the status bar. You’ll see something like doc: xxM / xxM. The first value is the size of the file, uncompressed, when flattened. The other is the filesize including layers.
look at the bottom of the screen
It may be at the bottom of the image window too.
Uncompressed file sizes of more than 48MB, we recommend that you do not interpolate your files to more than 55MB. This means you should make your JPEG file from an 8 bit TIFF file that is at least 48MB.
