Ko's deeply humanistic early work moved viewers with its black-and-white depictions of socially realistic themes. His middle-period commercial work was deemed striking even in New York and laid the foundation for his reputation as a master photographer.
早期的柯錫杰，以深具人道關懷的社會寫實黑白照感動人心；中期，連紐約也為之驚豔的商業攝影，為他奠定了「攝影大師」地位。