US 7,577,308 B2
Image data generation with reduced amount of processing
Hiroyuki Sakuyama, Tokyo (Japan)
Assigned to Ricoh Company, Ltd., Tokyo (Japan)
Filed on Apr. 17, 2007, as Appl. No. 11/787,883.
Application 11/787883 is a division of application No. 10/390193, filed on Mar. 14, 2003, granted, now 7,228,000.
Claims priority of application No. 2002-072696 (JP), filed on Mar. 15, 2002.
Prior Publication US 2007/0189622 A1, Aug. 16, 2007
Int. Cl. G06K 9/46 (2006.01)
U.S. Cl. 382—240  [382/233] 8 Claims
OG exemplary drawing
 
1. An image data generator for generating data for a reduced size image of an original image, the image data generator comprising:
a coefficient decoding unit to decode codes into which wavelet coefficients are coded; and
a code omitting unit to omit codes of wavelet coefficients not to be decoded other than the codes of wavelet coefficients that are to be subjected to an inverse wavelet transform in a same sub-band, the inverse wavelet transform being performed only on the wavelet coefficients in the same sub-band that have not been omitted, wherein the coefficient decoding unit decodes codes other than those omitted in the code omitting unit.