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How to combine image with mask

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hi , i read a image and want combine with mask that contain a line on it , i make a mask but i can't combine a image and mask that show line on the reading image
im=imread('apple.jpg');
mask=255*zeros(size(im));
mask=insertShape(mask,'line',[50 50 250 250],'linewidth',10,'color',[255 255 0]);
mask=uint8(mask);
subplot(1,3,1);
imshow(im);
title('original');
subplot(1,3,2);
imshow(mask);
% how to combine im and mask
% im3 = combine(im , mask)
subplot(1,3,3)
imshow(im3);
title('combine')
how can i do this and show line mask on original image?

Accepted Answer

Walter Roberson
Walter Roberson on 6 Jan 2017
im3 = im;
im3(mask ~= 0) = mask(mask ~= 0);
  3 Comments
sina alizadeh
sina alizadeh on 7 Jan 2017
i want to burns it in image , tanks for your help

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More Answers (2)

Changoleon
Changoleon on 6 Jan 2017
Edited: Walter Roberson on 6 Jan 2017
im=double(imread('autumn.tif'));
red = im(:,:,1);
gre = im(:,:,2);
blu = im(:,:,3);
mask=255*zeros(size(red));
mask=insertShape(mask,'line',[50 50 250 250],'linewidth',10,'color',[255 255 0]);
mask_red = mask(:,:,1).*red;
mask_gre = mask(:,:,1).*gre;
mask_blu = mask(:,:,1).*blu;
  1 Comment
sina alizadeh
sina alizadeh on 6 Jan 2017
tank's for your reply , i don't know how to use (mask_red , mask_gre , mask_blu) !

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Negesse Tadesse
Negesse Tadesse on 1 Sep 2019
can i get split the image from the mask again? here what i want is masking rgb to gray and compress using LZW. please

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