Need help to mask the image.

Hi,

I need help to mask this attached image. I just want the black background to be white and other image remains the same.

Please guide, thank you.

Answer 1

[Walter Roberson]

img = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/578172/untitled.jpg');
grimg = rgb2gray(img);
black = grimg < 10;
background = bwareafilt(black, 1);
grimg(background) = 255;
imshow(img); title('original')

imshow(grimg); title('filtered')