Newark727
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Photoshop - Any Tips For "magnetic Lasso" Tool?

Sat Jan 26, 2013 4:13 pm

Like many of you (I assume,) I edit my images before submitting them here with Photoshop, in my case CS5 for Mac. When I apply additional sharpening to an image as a JPEG, I try to only apply it to the airplane itself, and usually I can select off the rest with something like the magic wand tool, but sometimes there's a lot of contrast and clutter behind the aircraft and I can't do it quite like that. So I have to try and use the magnetic lasso tool to get the airplane, however since I first learned the program back when it was CS2, I've never been comfortable with this method- it is always picking the wrong edge, and the need to constantly keep the mouse around the edge is tiresome. It has a degree of configurability, so I might be able to fix some of that? I was wondering if any of you had experience or advice with this. Thanks.
 
KFLLCFII
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sat Jan 26, 2013 5:09 pm

While you're tracing the object, frequently click the mouse to "lock" the location of the selection before it gets a chance to jump off it. Conversely, you can also set a higher Frequency number so it does this on its own too. You can also adjust the Edge Contrast to a lower number so the tool becomes less "tolerant" to selecting objects adjacent to your desired selection.

I will say this though, using any tool for selecting the "edge" of an object usually prevents the outlined edges themselves from receiving sharpening, while only applying inside the selection. It has been my experience that using the Polygonal Lasso tool to roughly outline the entire object does a much better job to include the edges, and also saves the time and hassle as noted above from trying to use the Magic Wand or Magnetic Lasso. 99 shots out of 100, the little bit extra included in the selection but outside the object getting some sharpening is going to make no difference to the final product at all, because it's usually sky, shadow, or flat fuselage.

 
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Silver1SWA
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sat Jan 26, 2013 7:19 pm

I don't use any of the selection tools to select the aircraft only. I duplicate the layer and then use layer masking to control which part of the photo the effect is applied. The added benefit is being able to adjust brush and layer opacity for added control.

[Edited 2013-01-26 11:19:45]
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Newark727
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sat Jan 26, 2013 9:19 pm

Quoting Silver1SWA (Reply 2):
I don't use any of the selection tools to select the aircraft only. I duplicate the layer and then use layer masking to control which part of the photo the effect is applied. The added benefit is being able to adjust brush and layer opacity for added control.

That's clever, I might give it a try. Thanks.
 
vikkyvik
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sat Jan 26, 2013 10:17 pm

I don't use magnetic lasso. Instead, I just use the Polygonal Lasso tool and trace around the aircraft. I used to be very picky about tracing around the aircraft very carefully. Then I realized it doesn't really matter. So I just do it quickly and get it reasonably traced.
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DL747
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sat Jan 26, 2013 11:01 pm

Quoting vikkyvik (Reply 4):
I don't use magnetic lasso.

I second the notion. I use Polygonal like you said, or if it is selective sharpening to a part of the aircraft, just the regular lasso. If it is a very "congested" area that needs precise sharpening, I duplicate the layer like Ryan said.
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ptrjong
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sun Jan 27, 2013 12:32 am

Quoting vikkyvik (Reply 4):

Same here.
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ckw
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sun Jan 27, 2013 1:04 am

Depending on the subject, sometimes it is easier to duplicate the layer, sharpen the whole thing then erase what you don't want sharpened - you can also control the strength of the erase.

The ting with PS is there never seems to be one answer - most experienced users I know have a whole arsenal of tricks which they apply to images according to the content.

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Colin
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Silver1SWA
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RE: Photoshop - Any Tips For "magnetic Lasso" Tool?

Sun Jan 27, 2013 2:04 am

Quoting ckw (Reply 7):
Depending on the subject, sometimes it is easier to duplicate the layer, sharpen the whole thing then erase what you don't want sharpened - you can also control the strength of the erase.

Well this is pretty much the same thing I do, except I use layer masks instead of erasing because you can apply/un-apply if needed.
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