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06/24/2005 09:01:31 PM · #1 |
what is USM?
spot editing?
and all the other terms that everyone seems to use when explaining their photos...
i'm still learning and just recently submitted for a challenge... except for a few minor tweaks in PS, my images are mostly as they were taken... |
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06/24/2005 09:03:43 PM · #2 |
in Photoshop it stands for UnSharp Mask (used for sharpening images)
On a lens in stands for Ultra Silent Motor (I think...)
Kev |
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06/24/2005 09:08:47 PM · #3 |
They are something worth learning how to work with. That's the easiest way to describe it.
Spot editing is using the clone or heal tool to remove unwanted items/dust.
USM is a sharpening filter. |
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06/24/2005 09:15:33 PM · #4 |
Originally posted by kevrobertson:
Ultra Silent Motor (I think...)
Kev |
Ultrasonic not silent
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06/24/2005 09:27:29 PM · #5 |
| There's a Dictionary of photographic terms HERE. |
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06/24/2005 10:21:53 PM · #6 |
USM = Unsharp Mask, and it is visible under the "sharpen" subset of Photoshop filters. It is the most common way of bumping up the visual acuity ("sharpness") of images on this site. It's a very flexible tool. As others have pointed out, it's also the acronym for Ultrasonic Motor in autofocus lenses.
Spot Editing isn't just one thing, it refers to a class of actions you might take as you edit an image. We have two different rulesets, basic and advanced. In basic editing challenges, "spot editing" is not allowed. The easiest way to visualize spot editing is to realize that it involves any action that is applied to a portion of the image, usually by selection, rather than to the entire image at once. It doesn't have to be a selected portion, though, in the sense that the clone tool or the burn tool (or many other tools) only affect the area to which you apply them, and the "selection" as it were, is made on the fly as you "paint" with these tools.
It is possible to make basic editing-legal local area adjustments by using hue/saturation and selective color adjustment layers. Both of these are Photoshop adjustments the restrict their effects to predefined ranges of the image. You can, for example, legally change the saturation and brightness and even the hue of the blue portions of your image by adjusting the blue slider in hue/saturation, and you can legally change the colors of the dark, middle, and white areas of your image by using selective color adjustment, to name but two examples.
One thing you can't ever do in basic editing is make a "selection", whether by lasso, magic wand, or marquee, and then apply changes to the selected area. You can only do that in advanced editing. You also cannot use layers that contain pixel information, only "adhustment layers" which of themselves have no pixel information contained. And these layers can only be used in "normal" mode, whereas in advanced editing we have a whole list of other modes that allow us to achieve sometimes spectacular results.
That'll do for starters. More questions?
LOL.
Robt.
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06/24/2005 10:25:57 PM · #7 |
once again bear you rock!! fav use for spot editing .....zit removal
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06/24/2005 10:41:45 PM · #8 |
Originally posted by buzzmom:
once again bear you rock!! fav use for spot editing .....zit removal |
Haha how true! The model from my last shoot emailed me after looking at some of the photos I took of her and said "You forgot a zit in this one!" |
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06/24/2005 10:54:52 PM · #9 |
Originally posted by thewriterside:
Originally posted by buzzmom:
once again bear you rock!! fav use for spot editing .....zit removal |
Haha how true! The model from my last shoot emailed me after looking at some of the photos I took of her and said "You forgot a zit in this one!" |
LOL, that's funny.
R.
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06/28/2005 10:20:13 AM · #10 |
Here is a great link for Canon EOS lenses and explinations about them. Hope it helps.
Link
Click on the Canon EOS Beginners̢۪ FAQ link. |
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06/28/2005 10:28:03 AM · #11 |
Hi rikki11. There are some terrific tutorials under the "Learn" menu heading on dpChallenge. I've gone through every one of them, and learned something each time, even if I thought I already knew how to do something!
Here's one on USM:
//www.dpchallenge.com/tutorial.php?TUTORIAL_ID=4 |
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06/28/2005 11:00:54 AM · #12 |
Here's another Article/Tutorial from Popular Photography on USM, short read however the one that Bebe posted is excellent also.
Digital Toolbox: Look Sharp - How to beat the blur with Unsharp Mask |
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