MATLAB Central Newsreader - Combining image and plotted data

Combining image and plotted data

Doug Chan — Tue, 05 Feb 2008 05:04:01 -0500

Hi,
I have plotted some data onto a 1280x960 RGB image file
(imshow, hold on, plot(x,y)).
1) Can I update the 1280x960 image matrix to include this
newly plotted data?
2) If not, how can I save the 2D-plot+image without losing
the resolution of the original image? I used getframe but it
resized it and included the figure border.
Thanks.

Re: Combining image and plotted data

Yumnam Kirani Singh — Tue, 05 Feb 2008 05:41:04 -0500

there are some options, either you copy the image using copy figure option of the figure window and paste it in a new window of mspaint. You can also try Save As option under File menu of the figure window. here you can the format of the image file to be saved.

Combining image and plotted data

Mario — Mon, 07 Apr 2008 14:31:01 -0400

I have the following problem:

I have a bmp image and a vector of points. I want to plot
the points on the image and save the results. I tried with:

h=figure();
I=imshow(filenameIN);
hold on;
plot(x,y,’r-+’);
hold off;
saveas(h,filenameOUT);

It works fine if I "stay" in MATLAB and I do anything else.
But if I open, say, a web page while MATLAB is running these
commands, I get the webpage saved on the output image.
Is there any way to solve this problem (possibly without
using imshow but using imread instead, cause I’m not
interested in displaying the image)?
Thanks in advance for your help.

Yumnam Kirani Singh <kirani.singh@gmail.com> wrote in
message
<12336287.1202190094652.JavaMail.jakarta@nitrogen.mathforum.org>...
> there are some options, either you copy the image using
copy figure option of the figure window and paste it in a
new window of mspaint. You can also try Save As option under
File menu of the figure window. here you can the format of
the image file to be saved.

Re: Combining image and plotted data

Mario — Mon, 07 Apr 2008 16:09:02 -0400

I figured it out using the PRINT command but the output
image has not the same size as the input one.
How can I set the parameters of the print function?

Re: Combining image and plotted data

Mario — Mon, 07 Apr 2008 16:41:05 -0400

ok.. this is the solution to my problem:

h=figure(100);
for count=1:s
    xy=marks{count};
    hold on;
    plot(x(:,1),y(:,2),'r-+');
    hold off;
    outImg=sprintf('test%d.bmp',count);
    set(gcf,'PaperUnits','inches','PaperPosition',[0 0
6.4/1.5 4.8/1.5])
    eval(['print -dbmp ' outImg])
end

it works but the output image is 641x480 and not 640x480? why?

Re: Combining image and plotted data

us — Mon, 07 Apr 2008 17:19:02 -0400

"Mario ":
<SNIP causing CSSMers the blues...

> ok.. this is the solution to my problem:
> eval(['print -dbmp ' outImg])

it hurts so much - i need a drink...
us

Re: Combining image and plotted data

Mario — Mon, 07 Apr 2008 17:51:01 -0400

it was just a rough test! I took the cue from
http://www.mathworks.com/support/solutions/data/1-16WME.html?solution=1-16WME

Anyway, I forgot to put the following commands on the
previous code (before HOLD ON):

filename = sprintf('original.%d.bmp',count);
I=imshow(filename);

btw.. any idea to solve my problem without displaying the
images?

"us " <us@neurol.unizh.ch> wrote in message
<ftdl26$d23$1@fred.mathworks.com>...
> "Mario ":
> <SNIP causing CSSMers the blues...
>
> > ok.. this is the solution to my problem:
> > eval(['print -dbmp ' outImg])
>
> it hurts so much - i need a drink...
> us