Question

Problems. Grayscale images are composed of a 2D matrix of light intensities from O (Black) to 255 (White). In this lab you will be using grayscale images and do 2D-array operations along with loops and iflelse branches. 1. We can regard 2D grayscale images as 2D arrays. Now load the provided image of scientists at the Solvay Conference in 1927 using the imread) function and display it in a figure as follows: IMG-imread( SolvayConfere1927-jpg') figure imshow( IMG) 2. Creating a black & white (B&W) image from a grayscale image could be done using a threshold value. In a B&W image, there are two values: 255 for pure White and O for pure Black. Create a B&W 2D array(image) from the original image (IMG) using a logical indexing approach such that elements (pixels) with values greater than a threshold value of 133 is white and else is black. Use imshow) to display the B&W image/2D- array. You can check if your image is correct by roughly comparing it to the image given by the following built-in function: imshow im2bw(IMG, 133/255));

the picture above is the one you are supposed to use for the MATlab code please help

Answer 1

MATLAB CODE :

2)

IMG = imread('solvay_conference.png');

figure;

imshow(IMG);

threshold = 133;

image = IMG;

for i = 1:size(image,1)

for j = 1:size(image,2)

if image(i,j) < threshold

image(i,j) = 0;

else

image(i,j) = 255;

end

end

end

figure;

imshow(image);