Patent ID: 7995112

Claim:
An image-processing apparatus for processing an image signal, comprising: integration means for integrating the image signal in more than one unit of horizontal synchronization period; interpolation means for carrying out an interpolation process on the basis of integration values output by the integration means, a number of the integration values output by the integration means being reduced at a predetermined rate under control of the interpolation means, in order to generate integration values corresponding to a predetermined number of sampling positions set in advance during at least one period of flickers appearing on a screen under a fluorescent lamp; normalization means for normalizing an integration value output by the interpolation means or for normalizing a difference value between integration values output by the interpolation means as integration values for adjacent fields or adjacent frames, respectively; frequency analysis means for extracting a spectrum of the normalized integration value or the difference values output by the normalization means; and flicker inference means for inferring a flicker component from the spectrum extracted by the frequency analysis means.