How to download an image without its background

[Michiel Spape]

Hi,
You seem to really like canvas... I remember you had another problem with err, uploading an image, and thought canvas would help there as well :) I assume you can do such things with canvas programming, but the answer is far easier. Have a look at the transparency property in the help files: take a slide, insert a picture there with, as you say, a white background, change its transparency property to transparent, its source colour to white, use source colour to yes, and bingo: every white pixel is replaced by whatever is presented underneath this image.
Cheers,
Mich

Michiel Spapé
Research Fellow
Perception & Action group
University of Nottingham
School of Psychology


-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf Of gilis
Sent: 09 March 2010 10:24
To: E-Prime
Subject: How to download an image without its background

Hi,

In my experiment I use flankers. One of those should appear in the
center of the display, in the middle of the stimulus. It have to be
transparent obviously so the stimulus could be seen fully. The problem
is that I can't create flanker image which contain only the flanker
itself, without background. So it maens that the flanker has
background (white) which cover part of the stimulus.

I was thinking that maybe there is away to insert inline command that
will upload the flanker image from the folder-but with out the
background. Meaning that it will upload anything that is not white. I
just don't know how to do that, I assume that it's involved with
canvasing.

Would be very very grateful for help on this.

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