A test pattern is moved on a screen 5 subject to measurement with the
field of view of an image sensor pursuing the motion of the test pattern
so as to observe BEW. Subsequently, the field of view 33 of the image
sensor is moved at the same velocity vc as in the foregoing observation
to capture an image of a static pattern PE, and a blur width W along the
scrolling direction that appears in a distribution profile of the
captured image is observed. Based upon the blur width W and the exposure
time of the image sensor for capturing the image of the static pattern
PE, the moving velocity of the test pattern at the time of observation of
the BEW is estimated, and by using the moving velocity, the BEW is
normalized. Evaluation of the moving image quality of the screen is
carried out by using the normalized N BEW. The moving velocity of the
original test pattern can thus be estimated easily and accurately, and
accordingly, the moving image quality of the screen can be evaluated
accurately.