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From: Bismillah Kani on 18 Jun 2010 12:50
hi,
i need to display two images (left and right) more specifically color swatch for comparison. the display should be fullscreen with no other images displaying like scroll bar, filename etc. the right image should be able to changed by the user while the left one is fixed. this is for an experiment that i am going to conduct with different users for finding the color difference.
From: ImageAnalyst on 18 Jun 2010 16:29
I don't know that that is possible. As far as I know, you're always
going to have the titlebar and the window border at a minimum, and
usually some blank space between the edge of the image (which is in an
"axes" control) and the edge of the figure window. And if you're
using WIndows, you may have the task bar along the bottom of the
screen (unless you set it to auto-hide). What operating system are
you using?
From: us on 18 Jun 2010 16:45
"Bismillah Kani " <bismillahkani(a)gmail.com> wrote in message <hvg84b$ku9$1(a)fred.mathworks.com>...
> hi,
> i need to display two images (left and right) more specifically color swatch for comparison. the display should be fullscreen with no other images displaying like scroll bar, filename etc. the right image should be able to changed by the user while the left one is fixed. this is for an experiment that i am going to conduct with different users for finding the color difference.

one of the solutions

i1=.80*rand(5,3,3);
i2=rand(5,7,3);
img=[i1,i2];
itf=[false(size(i1)),true(size(i2))];
ih=image(img);
axis image;
axis off;
for i=1:10
imn=rand(size(i2)); % <- your new image...
img(itf)=imn;
set(ih,'cdata',img);
pause(.25); % <- change display speed...
end

us
From: ImageAnalyst on 18 Jun 2010 18:22
us:
I'm not seeing it. I see a bunch of color patches (not just two), and
there is also a figure window with border, a toolbar, and a bunch of
gray blank space around the colored patches, not to mention all the
other stuff on the screen including other applications, the Windows
taskbar and desktop background. I think he wants to do a
psychophysical study (probably in a darkened room) where there is
NOTHING, absolutely nothing, on the screen except the two color
patches, each taking up half the entire screen. The user would swap
out the right half color patch with a new one by hitting the spacebar
or something. In Windows, you could do this with DirectX but I don't
know how to do this from MATLAB.
From: us on 18 Jun 2010 18:40
ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <8fc6ade1-8c8d-4f3f-be47-1231619d5ef0(a)b7g2000vbl.googlegroups.com>...
> us:
> I'm not seeing it. I see a bunch of color patches (not just two), and
> there is also a figure window with border, a toolbar, and a bunch of
> gray blank space around the colored patches, not to mention all the
> other stuff on the screen including other applications, the Windows
> taskbar and desktop background. I think he wants to do a
> psychophysical study (probably in a darkened room) where there is
> NOTHING, absolutely nothing, on the screen except the two color
> patches, each taking up half the entire screen. The user would swap
> out the right half color patch with a new one by hitting the spacebar
> or something. In Windows, you could do this with DirectX but I don't
> know how to do this from MATLAB.

ia:
of course(!)... and i certainly realized that he/she wants to do a psyphys experiment...

all i showed was the SKELETON of how the OP could quickly change one (or more) parts of a combined image (i probably should have made this more clear, sorry!)...

naturally, he/she would have to do this
- replace I1 with the actual still image...
- replace IMN with the new image, eg,
a randomly selected bitmap from a stack of preloaded images (eg, faces, scenes)...
- replace the PAUSE statement with a smart KEYPRESS function...
- adjust the FIGURE size to full-screen (see another recent OP)...

i've created a complete test suite for our (similar) npsy experiments (including fancy acoustics, timing, timeout, and much more) based on this very (simple) engine...

us
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