Add second year

second/semester2/CT248/Assignments/Assignment-04/transform_threshold.m

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+function [img] = transform_threshold(img, threshold) 
+% function which converts the picture to binary format where any value 
+% above the threshold is white (1), and all values equal to or below are
+% black (0). 
+
+    % looping through each element in the matrix, and setting it to 1 if
+    % above the threshold, 0 otherwise
+    for i = 1:numel(img) 
+        if img(i) > threshold 
+            img(i) = 1; 
+        else 
+            img(i) = 0; 
+        end
+    end
+    
+    % casting the matrix to type logical once each element is either 1 or 0
+    img = logical(img);
+end