| US 7,489,361 B2 | ||
| Pixel interpolaton apparatus and method with discrimination of similarity between a discrimination block and a plurality of reference blocks | ||
| Eiichi Matsuzaki, Chofu (Japan); and Kenji Inoue, Hiratsuka (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 15, 2005, as Appl. No. 11/79,441. | ||
| Claims priority of application No. 2004-075204 (JP), filed on Mar. 16, 2004; and application No. 2005-065479 (JP), filed on Mar. 09, 2005. | ||
| Prior Publication US 2005/0212961 A1, Sep. 29, 2005 | ||
| Int. Cl. H04N 7/01 (2006.01); H04N 11/20 (2006.01); G09G 5/00 (2006.01); G06K 9/32 (2006.01) | ||
| U.S. Cl. 348—458 [348/448; 382/300; 382/269; 345/671] | 12 Claims |
| 1. A pixel interpolation apparatus comprising:
a discrimination circuit for discriminating, based on an input image signal, a similarity between (a) a discrimination block
including two pixels constituting an edge portion and (b) a plurality of reference blocks, both the discrimination block and
the plurality of reference blocks being constituted of plural pixels on original lines and interpolation pixel positions on
interpolation lines, wherein the plurality of reference blocks are, collectively, positioned neighboring to the discrimination
block and shifted upwards or downwards to a position by at least a line with respect to the discrimination block; and
a circuit for outputting pixel information of a plurality of interpolation pixels in a reference block positioned between
the discrimination block and another reference block having a similarity to the discrimination block,
wherein the pixel information of the plurality of interpolation pixels are determined so as to provide the interpolation pixels,
on the interpolation lines corresponding to pixel positions on the original lines in the discrimination block and the reference
block having the similarity, with pixel information based on pixel information of pixels on the pixel positions.
|