Who photographed Mahatma Gandhi for Indian currency notes?

Mahatma Gandhi’s iconic photograph on Indian currency notes was reportedly taken in 1946 at Viceroy House, now Rashtrapati Bhavan, in Delhi. His image first appeared on a commemorative note in 1969 and later on the ₹500 note in 1987. The RBI introduced the Mahatma Gandhi Series of banknotes in 1996.