Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2004-09-27
2008-08-26
Alavi, Amir (Department: 2624)
Image analysis
Image compression or coding
Quantization
Reexamination Certificate
active
07418148
ABSTRACT:
An image compression device provided for effective utilization of the memory used for image storage and for attaining a reduction in the compression processing time of an image. An image quality evaluation value calculation section calculates the image quality evaluation value of the block for image quality evaluation value calculation which is compressed using four quantization tables in which the quantized data in each is different. A quantization table selection section calculates an approximation curve for approximations or supplies the image quality evaluation value of the block for image quality evaluation value calculation for each quantization table and from the calculated approximation curve further calculates a standard table value for practicable compression to reduce the file size without deterioration of the image quality. Subsequently, a quantization section compresses the original image data using the quantization table with the calculated standard table value.
REFERENCES:
patent: 5473742 (1995-12-01), Polyakov et al.
patent: 5654760 (1997-08-01), Ohtsuki
patent: 5734368 (1998-03-01), Meyers et al.
patent: 5905578 (1999-05-01), Fujii et al.
patent: 6628709 (2003-09-01), Lin et al.
patent: 6671411 (2003-12-01), Satoh
patent: 6993546 (2006-01-01), Nally et al.
patent: 2003/0103676 (2003-06-01), Kuniba
patent: 2005/0069214 (2005-03-01), Hayashi
patent: 06-125545 (1994-05-01), None
patent: 06-334988 (1994-12-01), None
patent: 07-184062 (1995-07-01), None
patent: 08-195888 (1996-07-01), None
patent: 08-204970 (1996-08-01), None
patent: 08-205156 (1996-08-01), None
patent: 10-200893 (1998-07-01), None
Alavi Amir
Casio Computer Co. Ltd.
Frishauf Holtz Goodman & Chick P.C.
LandOfFree
Image compression method and image compression device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image compression method and image compression device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image compression method and image compression device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4000989