We developed a new MTF measurement method for display using a bar pattern image. This method was designed for easy measurement of the synthetic resolution of the display and the video interface of a computer. A bar pattern image was exposed with a single-lens reflex digital camera, and the waveform data obtained from this image data was processed by the interpolation technique based on a sampling theorem. MTF was then calculated by frequency analysis of the interpolated data. The precision and easy operativity of this method indicated its usefulness.