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edges of a image blur 1

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beco73

Programmer
May 8, 2005
157
CA
Hi,

How can I make edges of a image blur. I know I use the feather option, then after that I get lost.

Thanks
 
Are you using a blur filter or a blur tool?

- - picklefish - -
Why is everyone in this forum responding to me as picklefish?
 
Select your border with the selection tool (box/circle/polygone/magic wand), then invert your selection, feather selection, apply effect.

Also, you can set an adjustment layer, then apply a mask to that, then apply your blur effect. Anything underneath this 'adjustment layer' will blur, which is far more editable than applying directly to artwork.
 
I think I am missing some step when I try to do that.

I selcect the image using selection tool . I then go to select inverse. Then what I do? Feather does not work. If I remmeber right I believe I had to pres some key many times to keep on making blur

 
What you want to do, is create an adjustment layer in your layers window, (just like a new normal layer, but using the adjustment button instead, which is next to new layer button). Apply gausian blur to this adjustment layer. This will blur anything underneath this layer.

Now, for the time being, turn the layer off, so you can see the sharp picture, then select an area within the side limits of your image, ie leaving an area of your picture you don't want to blur. Then use that selection to create a mask on your adjustment layer (again the button is at the bottom of the layers window).

Your adjustment layer will have two boxes now on it's row. Select the right hand picture (which should be a black & white copy of your initial selection). This now means you are now affecting the mask properties of the layer. Masks are black and white images on a layer, where white is solid and black is transparent, so what ever is in that layer, only the white portion will show. Levels of grey are levels of transparency.

Turn the adjustment layer back on, you'll see the middle of your picture is blurred, but the edges aren't. You now want to soften the edge of the effect and then invert it so the outside is blurred but the centre is not. To do this....

Apply a gausian blur to this mask to soften the edges of your blur. Now select all, CTRL-A (Apple key-A on a mac), and do image/invert. This will now put the blur on the outside and make the centre sharp.

Voila, you should have your required effect.

Just a side note, Photoshop considers anything outside the canvas as transparent, which is why you blur the inverse of your mask, so that the hard edges of your canvas stay sharp when you re-invert the mask.

If it's not quite right, you can double click on the adjustment layer's left hand pic to pull up the blur attributes. If the edge is not quite right, you can either drag the mask (right hand b/w box) into the trash can, where you'll be prompted to whether you want to delete the layer or the mask, select mask, then re-do your selection. Or if you just want to soften the mask even more, select the mask box and apply some more blur.

Sorry it's kind of wordy, but you should get the gist of what the process is.

It's a better way of doing what you want to do, because you are not adjusting anything directly on the image layer, and if you want another pic with the same affect, you can just paste in a new image layer underneath the adjustment.

Also, instead of Gausian blur, try using radial blur, but set it to zoom, this will give a more dynamic effect, depending on what you want to achieve.

Good luck, masks are an integral part of photoshop, so getting to understand how they work will be a big plus.
 
thanks a lot for your help. it worked what you mentioned.

I also noticed if you make a selection and round the edge using feather, and then cut it. And then paste on document with white back ground, edge are blue.

 
Thanks bkrike, I originally came to this site to sort out a hardware issue I had, which I've not been able to sort out yet due to time constraints. But I've been working with Photoshop since version3 and I'm always learning new ways of doing things. What goes around comes around.

Cheers
 
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