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Post processing, image resizing and quality

post #1 of 11
Thread Starter 
I've noticed a bit of discussion (well a bit more than normal lately) about post-processing. I was able to take a class in college and for a semester's worth of work, I felt like I got to be 'efficient' in post-processing. I benefited from a couple of years of b&w negative work, so some of the concepts came pretty naturally and quickly.

Long story short though, that was... 7-8 years ago, using Photoshop 7. No, not CS7, 7. I've been getting back into shooting, and just for the sake of trying to add a bit of life to my images, I've essentially been using mostly auto correct stuff (dont worry, I'm using a slightly newer Photoshop now -- Elements 9, got it very cheap since I'm trying to save money for a big event in May), which seems to work as intended, with only one minor caveat -- I'm shooting raw on my T1i, and when I resize images, it always seems like my image quality goes down considerably.

For resizing, all I'm doing is going into 'Image -> Resize -> Image Resize' and trying to knock it down from it's ridiculously sized 4752x3168 to something that can be used / viewed, but by knocking the image down to more web friendly formats (let's say, for the sake of example, 900x600). Is this a poor way to resize? Am I simply missing something really obvious?

Just an example -- something from a few shots yesterday, resized down to 900x600 and cleaned up a bit (level adjustment, + 1 stop in exposure, noise reduction ~25% Luminence, cropped to 600x900 from 3168x4752)

Edited by MistaBernie - 2/7/11 at 8:39am
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post #2 of 11
When resizing, you should always sharpen after converting to JPEG, since the conversion and resizing process takes its toll.

About the shot in question - why f/22? At such a narrow aperture (atfer about f/11 or so for most lenses), diffraction comes into play, drastically reducing sharpness. On a low quality lens, such narrow apertures can produce incredibly soft images.

f/8-f/10 would've been plenty enough DOF for such a shot. The only time I might use an aperture >f/10 is to get slower shutter speeds in daylight.

And having the latest version of Photoshop CS isn't critical. I get by just fine 90% of time with Elements 7 and DPP. I use Lightroom 3 for big jobs like wedding shoots.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by GoneTomorrow View Post
When resizing, you should always sharpen after converting to JPEG, since the conversion and resizing process takes its toll.

About the shot in question - why f/22? At such a narrow aperture (atfer about f/11 or so for most lenses), diffraction comes into play, drastically reducing sharpness. On a low quality lens, such narrow apertures can produce incredibly soft images.

f/8-f/10 would've been plenty enough DOF for such a shot. The only time I might use an aperture >f/10 is to get slower shutter speeds in daylight.

And having the latest version of Photoshop CS isn't critical. I get by just fine 90% of time with Elements 7 and DPP. I use Lightroom 3 for big jobs like wedding shoots.
The f/22 was a (ridiculously callous) oversight on my part, I've been sick the last few days and thought I was reading 1/20; I didn't even realize how high my iso was Feel free to grab this image for a 'what not to do'. Of course, 1/20 should have set off 'wow, that's kind of slow for this amount of light', but I also made some other less-comical mistakes yesterday that are indicative of moderate medication usage

when you say to sharpen after the re-size, is that something in the resize menu that I'm simply overlooking?
Edited by MistaBernie - 2/7/11 at 8:41am
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post #4 of 11
Quote:
Originally Posted by MistaBernie View Post
The f/22 was a (ridiculously callous) oversight on my part, I've been sick the last few days and thought I was reading 1/20; I didn't even realize how high my iso was Feel free to grab this image for a 'what not to do'.

when you say to sharpen after the re-size, is that something in the resize menu that I'm simply overlooking?
IIRC, in Elements/PS/LR, when using the batch resizer, you can set it up to auto sharpen the converted JPEGs. For individual resizing, you have to do it manually.

Honestly, I just make sure that my actual shot settings are sufficient enough to produce tack sharp images, so much so that I don't bother with post-conversion JPEG sharpening. I will sharpen after resizing only if the shot wasn't super sharp SOOC.
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post #5 of 11
from what it sounds like you need a workflow program more then photo editing. i use lightroom3 and love it. its a bit expensive ~200 or something like 100 if you are a student (might want to double check that yourself) but it makes post processing a whole lot faster.

you can also try the program that comes with canon cameras, it should have most of the features needed for basic post process.
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post #6 of 11
Thread Starter 
I dont really need a workflow program, it's more of getting my images web ready. I simply refuse to put a 4k x 3k image on the web - think about the Canadians..
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post #7 of 11
I'm not sure about Elements but the full fat version of PS give you several options for the reduction sampling used when you resize, this can have an effect on certain images.

Other than that you don't need to do much else.

I always keep a master copy of my images then resize to suit the output medium and sharpen accordingly.

I never sharpen the master as different output mediums (i.e. Screen vs print) require different levels of sharpening. Sharpening is always the very last step before saving.
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post #8 of 11
Quote:
Originally Posted by MistaBernie View Post
I dont really need a workflow program, it's more of getting my images web ready. I simply refuse to put a 4k x 3k image on the web - think about the Canadians..
Good lookin' out for our neighbors!


@OP

If you're looking also for some specific tweaks, let me know, I have an excellent sharpening regiment that I apply to my photos and works extremely well, along with other tweaks I use regularly to enhance/post process my pictures.

Unless your shot is perfect, then no need!
    
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by GanjaSMK View Post
Good lookin' out for our neighbors!


@OP

If you're looking also for some specific tweaks, let me know, I have an excellent sharpening regiment that I apply to my photos and works extremely well, along with other tweaks I use regularly to enhance/post process my pictures.

Unless your shot is perfect, then no need!
LOL but I am the OP! PM incoming, thanks!
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post #10 of 11
Quote:
Originally Posted by MistaBernie View Post
I dont really need a workflow program, it's more of getting my images web ready. I simply refuse to put a 4k x 3k image on the web - think about the Canadians..
yea thats what a workflow program does, it allows you to do batch editing and conversions from raw to jpg.

ex. in LR3 for me, i have lens plugins so LR3 automatically corrects vignetting/distortions/etc then it runs a noise filter and then finally resizes to <5mp. everything is done when i click export.

you dont have to get LR3 or dxo, theres a free one that some of my friends use and they say its pretty good. i just dont remember the name off the top of my head right now......
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