How to save solid-color figure to tif file?

I am trying to save a tif image with a uniform color to see how that color appears in various applications (PhotoShop etc). Below I create a figure, set its background to green, and save it as a tif file. But when I open the tif file in PhotoShop or Windows Photos it's white, so I've lost the green background of the figure. And the second example also fails when I make a large green axis; the tif file appears white. I believe I am incorrectly stating the command line save command to create the tif file. How do I save an image file showing a solid region of color with no white border, i.e. filled to the image edge?

 f1 = figure;
 set(f1, 'color', 'g') % Make the figure background green
 saveas(gcf, 'green background1.tif') % When this tif file is opened, it appears white not green

Below changing the axis color also results in a white tif file when opened,

 f2 = figure;
 hAx1 = subplot(1,1,1); % Make one big axis
 set(hAx1,'Unit','normalized','Position',[0 0 1 1], ... % set the axes to full screen
   'xgrid', 'off', 'ygrid', 'off', 'xtick', [], 'ytick', []); % Keep the color uniform (no grid lines)
 set(hAx1, 'color', 'g'); % Make the axis green
 saveas(gcf, 'green background2.tif') % When this tif file is opened, it also appears white not green

But when I choose File > Save As from the f2 figure window, and choose to save to a tif file, the resulting tif file does appear green! How can I do this from the command line?

Answer 1

[Ameer Hamza]

if all you want is a solid color tif, you can do it using the following

image = zeros(500, 500, 3);
image(:,:,2) = 1;
imwrite(image, 'test.tif');

As for figure you can use following method to preserve color

 f1 = figure;
 set(f1, 'color', 'g') % Make the figure background green
 image = getframe(f1);
 imwrite(image.cdata, 'test.tif');

[KAE]

Works perfectly, thanks. I didn't think of getframe.

[Ameer Hamza]

You are welcome.