Tag Archives: Discrete Fourier transform

INTERVIEW AND SHORT ANSWER QUESTION ON IMAGE PROCESSING-BIOMEDICAL JOBS & NOTES QUESTION 41-60

41. What are the applications of transform.
1) To reduce band width
2) To reduce redundancy
3) To extract feature.

42. Give the Conditions for perfect transform?
Transpose of matrix = Inverse of a matrix.
Orthoganality.

43.  What are the properties of unitary transform?
1) Determinant and the Eigen values of a unitary matrix have unity   magnitude   2) the entropy of a random vector is preserved under a unitary  Transformation
3) Since the entropy is a measure of average information, this means information
is preserved under a unitary transformation.