Changing size in imshow

Hi Guys,

Whenever I want to display an image using imshow, it is always displayed at a smaller size. I get the following warning, "Warning: Image is too big to fit on screen; displaying at 67%".

Is there any way to display the image at 100% or maybe higher?

NS

Answer 1

[Image Analyst]

See this demo, from the help for imscrollpanel:

rgbImage = imread('concordaerial.png');

%    1. Create a scroll panel.
hFig = figure('Toolbar','none',...
      'Menubar','none');
hIm = imshow(rgbImage);
hSP = imscrollpanel(hFig,hIm);
set(hSP,'Units','normalized',...
    'Position',[0 .1 1 .9])

% 2. Add a Magnification Box and an Overview tool.
hMagBox = immagbox(hFig,hIm);
pos = get(hMagBox,'Position');
set(hMagBox,'Position',[0 0 pos(3) pos(4)])
imoverview(hIm)

% 3. Get the scroll panel API to programmatically control the view.
api = iptgetapi(hSP);

% 4. Get the current magnification and position.
mag = api.getMagnification();
r = api.getVisibleImageRect();

% 5. View the top left corner of the image.
api.setVisibleLocation(0.5,0.5)

% 6. Change the magnification to the value that just fits.
api.setMagnification(api.findFitMag())

% 7. Zoom in to 1600% on the dark spot.
api.setMagnificationAndCenter(16,306,800)

[NS]

Awesome..it works :)

Answer 2

[bym]

imshow('pout.tif','InitialMagnification',200)

[Image Analyst]

That won't do it. pout is smaller than the screen. Just try it with an image larger than the screen and you'll see that that does not work.

[Bayar Shahab]

That is code is "imshow('pout.tif','InitialMagnification',200)" working amazingly . You can even change the resolution to "fit" inorder to fit the screen. imshow('pout.tif','InitialMagnification','fit')

[Image Analyst]

Again, poutis smaller than the screen. My answer stands. Read the original poster's question. He has an image LARGER than the screen and wants it pixel for pixel, not shrunken down. What you did is the same as what proecsm. True, it works but it's for images smaller than the screen, not larger like the original poster wanted.

[arnold]

I'm having this problem in 2020 still. Really annoying, that the argument of InitialMagnification doesn't work if the images are larger than the screen and I can't seem to find a workaround.