Interpolating?

[dewmuw]

I've been asked to submit some pictures for an exhibit. But the organiser has given me this instruction:

Please interpolate the images to a minimum of 48MB using professional upsizing software.

Can I do this is PSCS and avoid having to buy something like Genuine Factals?

[Todd Jacobsen]

PSCS is not as good. Not sure about PSCS2.

Generally, a file size is not sufficient for determine image size. File size can fluctuate based on PS manipulations (composite, layers etc) even if the photo is "flattened" to a jpeg.

[dewmuw]

But I can do it in PSCS?

[kawter2]

File size can fluctuate based on PS manipulations (composite, layers etc) even if the photo is "flattened" to a jpeg.

Allthough this is true... Unfortunately, MANY (almost all) agencies require things like 48mb images.

For an An uncompressed 8bit TIFF in a 4:3 ratio you need a pixel size of 5019x3346 to equal a 48mb file


For an An uncompressed 16bit TIFF in a 4:3 ratio you need a pixel size of 3546x2364 to equal a 48mb file

[kawter2]

But I can do it in PSCS?



Yes, go to Image > Image Size


make sure to check constrain and resample, then enter one or the other sizes in the Pixel Dimension box and the other will change accordingly.

When you save, make sure to save as TIFF and choose NONE for compression

[dewmuw]

Thanks very much. I'll give it a go.

[PacAce]

Yes, go to Image > Image Size


make sure to check constrain and resample, then enter one or the other sizes in the Pixel Dimension box and the other will change accordingly.

When you save, make sure to save as TIFF and choose NONE for compression
You might also want to see if Bicubic Sharper (usually recommended for up-sizing) will give you a better image than just plain Bicubic.

[dewmuw]

Thanks Leo - I'll do a comparison.

[cmM]

You might also want to see if Bicubic Sharper (usually recommended for up-sizing) will give you a better image than just plain Bicubic.
Leo, I've been reading a book on PSCS and bicubic sharper is NOT recommended for upsizing, but for downsizing. For upsizing, better results come from using the bicubic smoother interpolation method.

I'll post some more info when I get home, don't have the book with me.
I've seen a 24x36 print from a 10D using PSCS and it looked pretty good.

[PacAce]

Leo, I've been reading a book on PSCS and bicubic sharper is NOT recommended for upsizing, but for downsizing. For upsizing, better results come from using the bicubic smoother interpolation method.

I'll post some more info when I get home, don't have the book with me.
I've seen a 24x36 print from a 10D using PSCS and it looked pretty good.
Oops! :o You are correct. Sorry, I meant to say Smoother, not Sharper. Darn, I always get does two words mixed up! :o

[Belmondo]

Oops! :o You are correct. Sorry, I meant to say Smoother, not Sharper. Darn, I always get does two words mixed up! :o

Just those two? You're lucky.

[PacAce]

Just those two? You're lucky.
Yeah, but you should see what words I mix them up with. Practically every word in the dictionary that's more than one syllable long. :mrgreen: