DLKAPA From , joined Dec 1969, posts, RR:
Reply 10, posted (10 years 12 months 1 day 2 hours ago) and read 2680 times:
Quoting Fly747 (Reply 7): it also seems as if you sharpened the whole image. Try sharpening just the airplane. Also the hot fumes look much better unsharpened.
Here is a common misconception about Photoshop. The way Unsharp Mask works, is that it finds the edges and then adjusts the contrast on either side of that edge, by brightening up the lighter side and darkening the darker side. In Photoshop's Unsharp Mask, there is a function called "Threshold." This function effectively tells photoshop what is an edge and what isn't. By raising the threshold, it will take more contrast between pixels to begin with to sharpen those pixels, and by lowering it, it will take less contrast between pixels at the start to sharpen those pixels. If you have a sky that is relatively noise-free and you set the threshold to about 3 or so levels, you don't have to select only the aircraft, you'd just be wasting your time.
Dendrobatid From United Kingdom, joined Nov 2004, 1732 posts, RR: 54
Reply 14, posted (10 years 12 months 17 hours ago) and read 2576 times:
Quoting Fly747 (Reply 11): thanks for the explanation, I was under a different impression but I stand corrected.
Edit: So what if you use 0 for threshold, then you are sharpening the whole image?
Most people seem to leave the threshold at 0 all of the time and I wonder why Adobe included it at all if it wasn't to be used. Every pixel, including noise, becomes a candidate for sharpening if you leave it at 0. I leave it at 1 for digital and 6 for scanning from slides.
If you can avoid sharpening the sky at all by using the magic wand, that is the best option though.
CallMeCapt From Australia, joined Jan 2005, 496 posts, RR: 6
Reply 17, posted (10 years 12 months 15 hours ago) and read 2524 times:
That photo was a bit of a problem for me to begin with and thought I could make good on it. Aperture only goes to F8 so I had some blurring in the background. So, I did selective sharpening. Might need a bit more practise, I think.
Gary, I tried sharpening the whole image but I was getting noticeable grain in the sky.
Ocassionally, I neat image the crap out of the sky if it goes too grainy. Getting a new camera very soon though. My new 300D arrives in 5 days. FujiFilm S7000 is ok and it has gotten me a couple of photos in the DB but I have no doubt picture quality will drastically improve with the 300D.
Without struggle, there is no progress. (Frederick Douglass)
VIR380 From Vatican City, joined Aug 2002, 629 posts, RR: 0
Reply 20, posted (10 years 12 months 14 hours ago) and read 2487 times:
Quoting CallMeCapt (Reply 19): No problem. To answer the question about cloning, there is no cloning in the image. I saw that spot as well and I think it's just blurred from the starboard engine exhaust
Thats fine i accept that
i really do like the image .... great scheme , reduce the sharness a touch and its a winner in my opinion
Moved away from this lost website to better things !