Patent Number: 8,717,446

Title: Image quality evaluation device, terminal device, image quality evaluation system, image quality evaluation method and computer-readable recording medium for storing programs

Abstract: The present invention evaluates the quality of an image shot by a terminal device in a state closer to that seen with the eye. A computer evaluates the quality of an image obtained by shooting a photographic subject including a periodic pattern that fluctuates periodically in one direction. A Fourier transform unit accomplishes a two-dimensional Fourier transform on the image to obtain two-dimensional spatial frequency spectrum components. An analysis unit analyzes the resolution of the image on the basis of spectrum components of spatial frequencies included in the periodic pattern, among the two-dimensional spatial frequency spectrum components obtained by the Fourier transform unit, and analyzes the deterioration of the image on the basis of spectrum components other than these.

Inventors: Masuda; Kozo (Tokyo, JP)

Assignee: NEC Casio Mobile Communications Ltd.

International Classification: H04N 5/228 (20060101); G06K 9/46 (20060101); G09G 5/02 (20060101)

Expiration Date: 5/06/12018