Resampling technique

S
Posted By
Steven
Dec 2, 2003
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517
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4
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Closed
Hello,

I was reading in the book "Photoshop for Digital Photographers" that its best to resample up in increments of 110%. Does anybody have any thoughts on this?

—
Thanks in advance,

Steven
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resample technique

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B
br
Dec 3, 2003
"Steven" wrote in message
Hello,

I was reading in the book "Photoshop for Digital Photographers" that its best to resample up in increments of 110%. Does anybody have any thoughts on this?

—
Thanks in advance,

Steven
Make yourself an Action of it and check it out!

Open an image you want res up.

Open the Actions palette and select "New Set".

Name it "Creeping Increase" or whatever you like.

Now select New Action and call it "1.5 Increase"

Next go to Image/Size and put a check in "Resample" and "Constrain Proportions"

with Bicubic and change the width drop down to "percent" and enter 110.

Now go to "Image Size" do the same 3 more times.

Then "Stop Recording"

Next "New Action" Name it "2.0 Increase"

Now "Edit/Purge All"

Next select the "1.5 Increase" in the Actions Palette

and press the Play button.

select the "1.5 Increase" again,

press the Play button again.

Stop Recording.

"New Action" Name it 3.0 Increase.

"Edit/Purge All"

Select and play the "2.0 Increase"

Select and play the "1.5 Increase"

Stop Recording.

"New Action" Name it 4.0 Increase.

"Edit/Purge All"

Select and play the "3.0 Increase"

Now "Image Size" 110 percent.

And again "Image Size" 110 percent.

Stop Recording.

Save the Action.
B
bhilton665
Dec 4, 2003
From: "Steven"

I was reading in the book "Photoshop for Digital Photographers" that its best to resample up in increments of 110%. Does anybody have any thoughts on this?

This is often called "Stair Interpolation" and it works very well on many images. You can write the action yourself very easily and quickly to automate it for different file sizes.

To see "SI" compared to several other upsampling choices, including Genuine Fractals, check this comparison by Fred Miranda, who is selling SI actions, so take it with a grain of salt. A few months ago I had to upsample a scan (I usually have plenty of resolution but got caught this once when someone ordered a larger than expected print) and I tried out 4 different techniques, including GF. Stair was judged the best in a blind viewing, so it works well in a lot of cases.

http://www.fredmiranda.com/SI/index.html

Give it a try, you have nothing to lose but a few minutes of your time.

Bill
BV
Bart van der Wolf
Dec 4, 2003
"Steven" wrote in message
Hello,

I was reading in the book "Photoshop for Digital Photographers" that its best to resample up in increments of 110%. Does anybody have any thoughts on this?

You can try it yourself with:
http://www.imphotography.com/downloads/ssimagesize.htm.

For resampling to a larger image, multiple 110% steps seem to work resonably well with many images, but as always the image content determines the best approach.
If you use the new Photoshop CS, you may want to review the percentages because the bicubic resizing functions have been improved/changed.

Bart
CC
Chris Cox
Dec 7, 2003
Not if you have Photoshop CS.

Chris

In article <bqipmi$>, Steven
wrote:

Hello,

I was reading in the book "Photoshop for Digital Photographers" that its best to resample up in increments of 110%. Does anybody have any thoughts on this?

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