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DPChallenge Forums >> Individual Photograph Discussion >> My DragonFly Step 2
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Showing posts 1 - 9 of 9, (reverse)
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09/30/2005 01:26:51 PM · #1
Hi. I am really appreciating the assistance available on this site. I have had one picture that appears to have stood out from the rest of the pack as being actually good.

My dragonfly pic. Unfortunately, I believe it needs a couple more steps of work. Curves and USM. I would like to see if anyone could help me with some suggestions on these. I am quite new to using PS and mostly desire to really understand how to make certain decisions about USM.

The curves thing is more "Should I or shouldn't I" try to put the black spots at the wingtips to full black? I really love how the black border sets them off.

My goal with this pic is to get it good enough to print in a LARGE size and see if my parents or grandparents are interested in this as a gift for their home. (more about it suiting a room really) If I can get it to this stage, I would be happy. I doubt it's anywhere near the kind of quality that could be a sellable print and it would probably be presumptuous to even try to present it as that.

Thanks again. Here is the pic.

After my terrible results in the current challenge. I am really second guessing my abilities and eye.

Edit: don't know what happened to that thumbnail link. I was sure I put it in there originally. Thanks Faidoi

Message edited by author 2005-10-01 07:45:58.
10/01/2005 12:50:25 AM · #2
bump
10/01/2005 12:56:39 AM · #3
Originally posted by eschelar:


Thanks again. Here is the pic.



?
10/01/2005 07:24:36 AM · #4
I had a go at the shot, not sure i've improved it much though.

My edits are listed in the description.
10/01/2005 07:42:01 AM · #5
Thanks riot. I am not able to see an orange cast on my monitor. My screen is calibrated. Perhaps that is my own inability to see reds? I have the most minor level of colour blindness according to the driver's license test.

Could you please let me know what settings you used for USM? When I do it, I always end up with artifacting and weird stuff in the images or it doesn't seem to do anything.

I noticed that you did actually adjust to bring the black spots in the wingtips to full black via a contrast setting. Was this something you were unsure about as an improvement or something you felt was necessary?

Does anyone else have a take on this?

10/01/2005 08:02:21 AM · #6
Originally posted by eschelar:

Thanks riot. I am not able to see an orange cast on my monitor. My screen is calibrated. Perhaps that is my own inability to see reds? I have the most minor level of colour blindness according to the driver's license test.

It's not a strong colour cast by any means, just the green looked a little brownish to me before i fiddled it. I just think having colder greens brings out the magenta of the dragonfly a bit better by contrast.

Originally posted by eschelar:


Could you please let me know what settings you used for USM? When I do it, I always end up with artifacting and weird stuff in the images or it doesn't seem to do anything.

I actually used "adaptive sharpen" in corel photopaint, which only has a percentage setting (i used 100%). I went back and tried to achieve the same effect using just USM - i managed to get pretty much the same effect by using USM twice, first with 100%, radius 1, threshold 0, and second pass the same but only 50% instead. I'm not really happy with the sharpening i've done though, there's a bit of visible haloing, especially around the head. It might perhaps be better to selectively sharpen just the wings and body.

Originally posted by eschelar:


I noticed that you did actually adjust to bring the black spots in the wingtips to full black via a contrast setting. Was this something you were unsure about as an improvement or something you felt was necessary?

Actually i didn't really alter the low end of the histogram, i think the blackness of the spots is due to the way i removed the orange/red cast - the only thing stopping them being black is a little tinge of red, at least on my monitor.
10/01/2005 08:27:52 AM · #7


Here is my version. I like to add this style of border to prints that are going to be framed.
10/01/2005 09:38:12 AM · #8
Man you guys are awesome. Thanks SO much. Sweet border Spydr!

Could you also post the numbers on the changes you made? Thanks.

Riot: Wow. Looking at the thumbnails, I was really able to see that brown. I never even would have thought that this was orange cast. Shows what I know :).

Is there a particular reason that you chose to use two passes with USM?

Exactly how did you remove the orange cast? Did you reduce saturation to the oranges? Did you hueshift the oranges?

I'd love to know. Thanks.

I'm a little nervous of making changes to selective colour channels as they tend to bring out a lot of noise that is present in my pictures to small degrees.
10/01/2005 12:36:00 PM · #9
Originally posted by eschelar:

Is there a particular reason that you chose to use two passes with USM?

Yep - repeated passes of USM can sometimes bring out detail in murky areas of a low res image, i.e. the wings of this dragonfly. Generally though you should avoid running sharpening algorithms more than once, as it just brings out grain and can add sharpening artefacts that a single pass wouldn't.

Originally posted by eschelar:


Exactly how did you remove the orange cast? Did you reduce saturation to the oranges? Did you hueshift the oranges?

Corel photopaint has a "color balance" tool which is what i used, just shifted the red channel slider -17% (towards cyan). You could probably achieve the same effect with the channel mixer.

Originally posted by eschelar:


I'm a little nervous of making changes to selective colour channels as they tend to bring out a lot of noise that is present in my pictures to small degrees.

Well, that'll only happen if you're boosting one colour channel a lot, in an image that generally has a lot of whites / greys. In an image like this, most of the image's colours are only on one or two channels anyway (the green etc) so making small changes to unimportant channels shouldn't increase the noise noticeably.
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