Giving a frame to a image

How to make a function which frames a image with input as image, frame size and frame color. Where frame colour is a vector of 3 numbers from 0 to 1. The proportion of frame width should be taken from smaller two dimensions of image.

Answer 1

[Ameer Hamza]

Try something like this

im = imread('pears.png');

im = im2double(im);
frame_size = 100;
frame_color = [1, 0, 1];
framed_image = frameImage(im, frame_color, frame_size);
imshow(framed_image);

function im_out = frameImage(im, frame_color, frame_size)
    im_out = repmat(reshape(frame_color, 1, 1, []), ...
        size(im, [1 2])+2*frame_size);
    im_out(frame_size+1:end-frame_size, frame_size+1:end-frame_size, :) = im;
end

[Mayur Deogade]

This code has a error and it says

Error: File: frameImage.m Line: 8 Column: 11

Function definitions are not permitted in this context.

[Ameer Hamza]

Which version of MATLAB are you using?

[Mayur Deogade]

Matlab R2016a

[Ameer Hamza]

In that case, create a new file named frameImage.m and paste the following code inside it

function im_out = frameImage(im, frame_color, frame_size)
    im_out = repmat(reshape(frame_color, 1, 1, []), ...
        size(im, [1 2])+2*frame_size);
    im_out(frame_size+1:end-frame_size, frame_size+1:end-frame_size, :) = im;
end

and then run the following code

im = imread('pears.png');
im = im2double(im);
frame_size = 100;
frame_color = [1, 0, 1];
framed_image = frameImage(im, frame_color, frame_size);
imshow(framed_image);

[Mayur Deogade]

frameImage has the function

today1 has the code

Tried this too it says the following error.

Error using size

Dimension argument must be a positive integer scalar within indexing range.

Error in frameImage (line 2)

im_out = repmat(reshape(frame_color, 1, 1, []),size(im, [1 2])+2*frame_size);

Error in today1 (line 5)

framed_image = frameImage(im, frame_color, frame_size);

[Ameer Hamza]

Can you show your input image?

[Mayur Deogade]

[Ameer Hamza]

Since you are using an older version of MATLAB, the size() function have different input parameters. Change the function definition to this

function im_out = frameImage(im, frame_color, frame_size)
    im_out = repmat(reshape(frame_color, 1, 1, []), ...
        [size(im, 1) size(im, 2)]+2*frame_size);
    im_out(frame_size+1:end-frame_size, frame_size+1:end-frame_size, :) = im;
end

[Mayur Deogade]

Thank you so much for your guidance.

Now i need to give the border inside of the image. The outer dimensions should be same for image. How can i do it?

[Ameer Hamza]

Try this

function im_out = frameImage(im, frame_color, frame_size)
    im_out = repmat(reshape(frame_color, 1, 1, []), ...
        [size(im, 1) size(im, 2)]);
    im_out(frame_size+1:end-frame_size, frame_size+1:end-frame_size, :) = ...
        im(frame_size+1:end-frame_size, frame_size+1:end-frame_size, :);
end

[Mayur Deogade]

Thank you so much for your kind help. Now, i am facing a problem with the montage. I need to create a montage for 20 images.

the 20 images are derived from the same image with a change in border_size and then i have to make a montage with the help of using a loop

[Ameer Hamza]

Can you show an example of how 20 images will be displayed?

[Mayur Deogade]

I did this my writing a code 20 times as i am not able to store the images and plotted the image using array.

But i need to use montage.

[Ameer Hamza]

Try this code

im = imread('Autumn.png');
im = im2double(im);

frame_size = randi([1, 100], 20, 1); % random frame sizes
frame_color = rand(20, 3); % random colors

images = cell(20, 1);
for i = 1:20
    images{i} = frameImage(im, frame_color(i,:), frame_size(i));
end

montage(images, 'Size', [4 5]);

[Mayur Deogade]

Error using images.internal.getImageFromFile (line 7)

The specified filename is not a string.

Error in montage>getImagesFromFiles (line 355)

[img, map] = images.internal.getImageFromFile(fileNames{1});

Error in montage>parse_inputs (line 241)

[I,cmap] = getImagesFromFiles(varargin{1});

Error in montage (line 114)

[I,cmap,mSize,indices,displayRange,parent] = parse_inputs(varargin{:});

Error in today2 (line 9)

montage(images, 'Size', [4 5]);

[Image Analyst]

Try imtile() instead of montage(), or else pass montage() the filenames, not the images themselves.

[Ameer Hamza]

An alternate solution for R2016a is

im = imread('Autumn.png');
im = im2double(im);

frame_size = randi([1, 100], 20, 1); % random frame sizes
frame_color = rand(20, 3); % random colors

images = cell(20, 1);
for i = 1:20
    images{i} = frameImage(im, frame_color(i,:), frame_size(i));
end

images = cat(4, images{:});
montage(images, 'Size', [4 5]);

[Mayur Deogade]

Thank you so much for your help. It really helped me a lot.

[Ameer Hamza]

I am glad to be of help!