Image Size Issue

In article <MZvGf.15955$ says…

Ok, I have printed image that is 5X7. I need to scan it in and blow it up to 48X60. I will be using a paintbrush filter on it eventually so I still want the quality to be as good as possible but I understand what I’m getting into with image quality. I have an Epson 4990 scanner that can sacan in at 42 bit 4800 dpi. How do I scan this in and get the output image file to be 48X60 inches? Thanks.

Jambroom

Before you get in too deeply into this project, you might want to just scan the 5×7 at the highest setting that your scanner allows, bring it into PS and then Image>Image Size to the 48x with Resample checked. Grab a piece of it, say 8×10 and print it out. Take a look at what you get. Can you live with that? Will the viewing distance be such that most viewers will be OK with it? I kind of doubt it, but you need to make the decision. I’d suggest that you look for the original, and hope that it’s a MF trans, or neg, at least, but that is just me.

Hunt

Hunt wrote:

In article <MZvGf.15955$ says…

Ok, I have printed image that is 5X7. I need to scan it in and blow it up to 48X60. I will be using a paintbrush filter on it eventually so I still want the quality to be as good as possible but I understand what I’m getting into with image quality. I have an Epson 4990 scanner that can sacan in at 42 bit 4800 dpi. How do I scan this in and get the output image file to be 48X60 inches? Thanks.

Jambroom

Before you get in too deeply into this project, you might want to just scan the 5×7 at the highest setting that your scanner allows, bring it into PS and then Image>Image Size to the 48x with Resample checked. Grab a piece of it, say 8×10 and print it out. Take a look at what you get. Can you live with that? Will the viewing distance be such that most viewers will be OK with it? I kind of doubt it, but you need to make the decision. I’d suggest that you look for the original, and hope that it’s a MF trans, or neg, at least, but that is just me.

Hunt

What he said, with the proviso that when it comes time to do your resizing you use (incrementally until you reach your target size) one of the many 110% resizing actions available. I have had great success achieving some pretty impressive zooms with such an action. I don’t know the math behind the resizing algorithm, but it seems intuitively reasonable that the algorithm is operating on a much smaller dataset transform going in 110% jumps than, say, 200% jumps, so the interpolation routines result in higher fidelity to the original. Someone else may be able to speak to the technicalities, but I can say that empirical observation seems to indicate that it works pretty well.

Cheers,
Scott

Thanks for the tips. One more quick question…when I scanned the image in at 24 bit, 3200 dpi the file I end up with is about 1.2 gigs…ya, that’s right. Cumbersome at best to work with but if that sounds right then it’s right and I’ll deal with it. Just want to make sure I’m not doing something completely weird.

Jabroom
"Scott Glasgow" wrote in message

Hunt wrote:

In article <MZvGf.15955$ says…

Ok, I have printed image that is 5X7. I need to scan it in and blow it up to 48X60. I will be using a paintbrush filter on it eventually so I still want the quality to be as good as possible but I understand what I’m getting into with image quality. I have an Epson 4990 scanner that can sacan in at 42 bit 4800 dpi. How do I scan this in and get the output image file to be 48X60 inches? Thanks.

Jambroom

Before you get in too deeply into this project, you might want to just scan the 5×7 at the highest setting that your scanner allows, bring it into PS and then Image>Image Size to the 48x with Resample checked. Grab a piece of it, say 8×10 and print it out. Take a look at what you get. Can you live with that? Will the viewing distance be such that most viewers will be OK with it? I kind of doubt it, but you need to make the decision. I’d suggest that you look for the original, and hope that it’s a MF trans, or neg, at least, but that is just me.

Hunt

What he said, with the proviso that when it comes time to do your resizing you use (incrementally until you reach your target size) one of the many 110% resizing actions available. I have had great success achieving some pretty impressive zooms with such an action. I don’t know the math behind the resizing algorithm, but it seems intuitively reasonable that the algorithm is operating on a much smaller dataset transform going in 110% jumps than, say, 200% jumps, so the interpolation routines result in higher fidelity to the original. Someone else may be able to speak to the technicalities, but I can say that empirical observation seems to indicate that it works pretty well.

Cheers,
Scott

In article <MZvGf.15955$>, "Jabroom"
wrote:

Ok, I have printed image that is 5X7. I need to scan it in and blow it up to 48X60. I will be using a paintbrush filter on it eventually so I still want the quality to be as good as possible but I understand what I’m getting into with image quality. I have an Epson 4990 scanner that can sacan in at 42 bit 4800 dpi. How do I scan this in and get the output image file to be 48X60 inches? Thanks.

Open your Epson scanner software.

In the scan options, set a target output size of 48×60 and whatever resolution you need.

—
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Jabroom wrote:

Thanks for the tips. One more quick question…when I scanned the image in at 24 bit, 3200 dpi the file I end up with is about 1.2 gigs…ya, that’s right. Cumbersome at best to work with but if that sounds right then it’s right and I’ll deal with it. Just want to make sure I’m not doing something completely weird.

That’s correct. You scanned an original of 5 x 7 inch at 3200 pixels per inch. That means you get 5 x 3200 x 7 x 3200 pixels = 358 million pixels. One pixel is 3 bytes (24 bits), so thats 1,0752 million bytes. That’s around one Gigabyte, so the original was probably a bit bigger than exactly 5 x 7 inch.

—
Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer http://www.johanfoto.nl/

In article <MZvGf.15955$ says…

Ok, I have printed image that is 5X7. I need to scan it in and blow it up to 48X60. I will be using a paintbrush filter on it eventually so I still want the quality to be as good as possible but I understand what I’m getting into with image quality. I have an Epson 4990 scanner that can sacan in at 42 bit 4800 dpi. How do I scan this in and get the output image file to be 48X60 inches? Thanks.

Jambroom

There is no reason to scan an original photo at more than 600dpi, there just isn’t any more detail than that in a photographic enlargement. Many people would say that 300 dpi is enough, so the advice to scan at your scanner’s max resolution will just give you a file bigger than necessary and make it harder to edit.

—
Robert D Feinman
Landscapes, Cityscapes and Panoramic Photographs
http://robertdfeinman.com
mail:

You may also want concider taking the negetive into a photoshop and have them scan that. That way it is of the highest quality possable. (remember to ask for a file that is at least 14,400×18,000 pix if you plan to pring at 300dpi)
"Robert Feinman" wrote in message

In article <MZvGf.15955$ says…

Ok, I have printed image that is 5X7. I need to scan it in and blow it

up

to 48X60. I will be using a paintbrush filter on it eventually so I

still

want the quality to be as good as possible but I understand what I’m

getting

into with image quality. I have an Epson 4990 scanner that can sacan in

at

42 bit 4800 dpi. How do I scan this in and get the output image file to

be

48X60 inches? Thanks.

Jambroom

There is no reason to scan an original photo at more than 600dpi, there just isn’t any more detail than that in a photographic enlargement. Many people would say that 300 dpi is enough, so the advice to scan at your scanner’s max resolution will just give you a file bigger than necessary and make it harder to edit.
—
Robert D Feinman
Landscapes, Cityscapes and Panoramic Photographs
http://robertdfeinman.com
mail:

Harvey wrote:

You may also want concider taking the negetive into a photoshop and have them scan that. That way it is of the highest quality possable. (remember to ask for a file that is at least 14,400×18,000 pix if you plan to pring at 300dpi)
"Robert Feinman" wrote in message

In article <MZvGf.15955$ says…

Ok, I have printed image that is 5X7. I need to scan it in and blow it up to 48X60. I will be using a paintbrush filter on it eventually so I still want the quality to be as good as possible but I understand what I’m getting into with image quality. I have an Epson 4990 scanner that can sacan in at 42 bit 4800 dpi. How do I scan this in and get the output image file to be 48X60 inches? Thanks.

Jambroom

There is no reason to scan an original photo at more than 600dpi, there just isn’t any more detail than that in a photographic enlargement. Many people would say that 300 dpi is enough, so the advice to scan at your scanner’s max resolution will just give you a file bigger than necessary and make it harder to edit.
—
Robert D Feinman
Landscapes, Cityscapes and Panoramic Photographs
http://robertdfeinman.com
mail:

Are you out of your fucking mind? 14,400×18,000? What media do you propose to have them output it to, since that file is 9.072 GB, eh?

Somebody please tell me I just responded to a moron, instead of simply supplying nourishment to the troll.