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transparency of logo

Started by chris-grieve , May 30 2007 12:58 PM

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10 replies to this topic

#1 chris-grieve

Young Padawan

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18 posts

Posted 30 May 2007 - 12:58 PM

hi all,

my friend gave me a logo that he wants the square background changed from white to transparent, but when i save it out then open it again in an image preview there is the white background again. this is probably simple and i am just missing something. anyone able to help?

i.e. the white circle would be the logo, and the blue bit is what he wants transparent.

Untitled_1.jpg 45.04KB 79 downloads

chris-grieve

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#2 Dance

P2L Jedi

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871 posts

Gender:Male
Location:UpNorth

Posted 30 May 2007 - 01:21 PM

Cirkles are in themselfs hard to select using magicwand tools and such beacuse of the anti alialing issues, perfect cirkles like that id use the rulers(or just estimate it and get it right after 2-3 quick atempts) to find the absolute center and then use the round marquee tool to select precisely along the line (or use the round shapetool to save the selection as a vector if needed to scale with the logo) then invert the selection Ctrl-Shift-i and delete the background.

There are ofc alot of alternate methods, the extract filter might do a great job or using a color range selection or selecting by channels or magicwand and then edit the selection via a alpha channel... but but, its whatever you find works and is less time consumeing.

Edited by Dance, 30 May 2007 - 01:23 PM.

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#3 chris-grieve

Young Padawan

Members
18 posts

Posted 30 May 2007 - 01:41 PM

its ok i figured it out.,

i knew how to select it and remove the background, but when i saved it out it replaced the transparent background with white, i figured out that it needed to be saved out as a png instead of jpg.

but thanks for taking your time to help.

chris-grieve

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#4 _Creative Insanity_

Guests

Posted 30 May 2007 - 01:41 PM

Really simple.
Create a canvas of the size you want.
Use background contents of transparent.
Using the circular marquee tool to create the circle while holding down shift.
Create a new layer and fill with the colour you want.
On the bottom layer select all.
Click on the circle layer and press V.
On the top properties bar for the move tool use the center vert and hori buttons to center the circle correctly.
Now save for web as either a gif or png. Not jpeg as that will give a background colour.
Done!

Below is the outcome. The outline on the box is the transparent section.