The variation of relief height on the developed and/or bleached photographic image has been measured for SCIENTIA 10E75AH photographic plate by exposing with a spatial frequency series of sinusoidal patterns and scanning the developed images to determine the peak-to-peak variation of density and the modulation of the exposed pattern for each frequency. A rotary drum method and a laser interference method were used for exposing the sine-wave test patterns. The response characteristics of the micro-densitometer and the modulations of exposed patterns can be obtained by assuming the ordinal MTF of the photographic plate to the always 1. MTF of photographic relief images can be calculated from the data obtained by experimental measurements for an unbleached or a bleached photographic material. A method is described for obtaining the MTF of general relief images formed by photo-sensitive materials.