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Mayra of San Antonio
Old 02-23-2004, 07:15 PM   #1 (permalink)
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Shot last week with a Kodak 14n ISO 100 Nikon 28-70 2.8 IMage size 16x20
Lighting-Acute 2r strip and ring two monos on the sides
Shot at f8 with a fan

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Re: Mayra of San Antonio
Old 02-24-2004, 01:19 AM   #2 (permalink)
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My main comment is your image posted looks over-compressed. Why have a Kodak 14n if you can't show off some higher detail?

I like the colors, maybe a little more contrast, and a 3/4 turn on the torso by the stomach area (or conversely, an outfit that is a little more form fitting to show off her waist). Not that I would have noticed it if I were shooting.
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Re: Mayra of San Antonio
Old 02-24-2004, 08:31 AM   #3 (permalink)
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The image as constructed is a 16x20 TIFF. Detail is down to single strands of hair. The only compression was the jpeg conversion for web. Image was shot in raw and finished at size. Thanks for your excellent comments, and your flattering comment about Mayra, she is lovely, as you can see...

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Re: Mayra of San Antonio
Old 02-24-2004, 10:40 AM   #4 (permalink)
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Actually Hugh, if you scaled the shot down then saved right away you may have done more damage than you think. The simple act of reducing a photo for use on the web will throw in a lot of potential problems. Or more precicely, remove a lot of detail. When you scale down you're not JUST making the image smaller, you're telling the software that you don't need a vast majority of the pixels in the image. So if you have a photo that is 400 x 400 pixels and you want to scale it to 200 x 200 the software has to get rid of HALF the pixels contained in the image. So now you want to take a shot that's 3000 x 2000 and scale it to 800 x 600, well, that's a lot of pixels being taken out of your photo. So what the software does is tries to make the most of it by doing it's whole Interpolation thing which is a mathematical formula for averaging information. Basically the software will try it's best not to ruin your picture. What happens though is that at the smaller size your image will become a bit soft. A light sharpening will help restore a lot of the detail so that the .jpg compression has more to work with and doesn't cause the smearing that often happens.

You may already know that stuff but I thought I would mention it anyways for those who may not quite know. I just hope it made sense!

Cheers!
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Re: Mayra of San Antonio
Old 02-24-2004, 11:10 AM   #5 (permalink)
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One nit pick, Dave - if you start at 400 x 400 and scale to 200 x 200, you throw away 3/4 of the pixels, not 1/2.

I only realized this because your post was informative enough to make me think hard about it. I hadn't really thought about it this way and it makes a lot of sense and probably explains some of the problems I run into in working on resized images. Thanks.

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Re: Mayra of San Antonio
Old 02-24-2004, 01:55 PM   #6 (permalink)
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ACK! You are 100% correct! Thanks for catching that! You are left with only 25% of the original image. Now I'm curious...Hmmm...Come on Math! Work with me!

Okay, I suck at math. What't the percentage of an image 600 x 400 compared to 3000 x 2000? As near as I can figure it's gotta be about a 700% loss. Am I anywhere near close?

Oi... [img]/ubbthreads/images/graemlins/crazy.gif[/img]
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Re: Mayra of San Antonio
Old 02-24-2004, 02:31 PM   #7 (permalink)
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Hugh
Beautiful as usual. I almost missed this post because I failed to note this new forum.

Where do you get your drapery?

I may be in San Antonio on March 5th, want to do lunch.

Mike
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The thing I like about this model the best...
Old 02-24-2004, 03:15 PM   #8 (permalink)
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...her eyes are HUGE. That's fabulous.
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Re: Mayra of San Antonio
Old 02-24-2004, 03:42 PM   #9 (permalink)
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from 3000x2000 to 600x400 you lose 96% of your original pixels as long as math in photography is the same as math in advertising.
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Re: Mayra of San Antonio
Old 02-24-2004, 04:04 PM   #10 (permalink)
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I get confused in thinking about percentage reduction or enlargement and prefer to think in terms of change from original information -

I think of it as
600/3000 = 1/5
400/2000 = 1/5

1/5 x 1/5 = 1/25 of original information = 4% of original

I suppose then that this would be a 96% reduction?
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