Hello Quazi,
blob(blob == blob(i,j-1)) = blob(i-1,j);
This line is replacing all occurrences of the value blob(i, j-1) in the matrix blob with the value at blob(i-1, j). To understand this in detail, let us go through this step by step:
- blob(i, j-1): This accesses the element in the blob matrix located at row i and column j-1.
- blob == blob(i, j-1): This creates a logical matrix of the same size as blob, where each element is true if it is equal to blob(i, j-1) and false otherwise.
- blob(blob == blob(i, j-1)): This uses logical indexing to select all elements in blob that are equal to blob(i, j-1).
- blob(i-1, j): This accesses the element in the blob matrix located at row i-1 and column j.
- The final operation assigns the value of blob(i-1, j) to all elements in blob that are equal to blob(i, j-1).
I hope this explains everything!
