Method and apparatus for forming image scaling filters

Data processing: generic control systems or specific application – Generic control system – apparatus or process – Optimization or adaptive control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

702190, G05B 1302, G06F 1500

Patent

active

061285390

ABSTRACT:
A method of forming an image scaling filter for converting a first number of input lines to a second number of output lines comprises the steps of determining an optimal frequency response without sharp cutoffs for a given scaling factor and for a determined number of taps per line 102. Filter coefficients are provided based on the determined filter taps per line and the determined optimal frequency response 103. The coefficients are grouped into sets 104 corresponding to the taps per output line and the coefficients are rescaled so the sum of the set equals one 105. The input lines are multiplied by the rescaled coefficients and summed 106 to achieve the output line values.

REFERENCES:
patent: 5097322 (1992-03-01), Fairhurst
patent: 5212659 (1993-05-01), Scott et al.
patent: 5335020 (1994-08-01), Dieterich
patent: 5337261 (1994-08-01), Rogers
patent: 5384869 (1995-01-01), Wilkinson et al.
patent: 5422827 (1995-06-01), Niehaus
Lien, Brian K., "On the Cascade Realization of 2-D FIR Filters Designated by McCellan Transformation," IEEE Transactions on Signal Processing, vol. 40, No. 9, Sep. 1992. pp. 2338-2340.
Horning, Darrell W., and Chassaing, Rulph, "IIR Filter Scaling for Real-Time Signal Processing," IEEE Transaction on Education, vol. 34, No. 1, Feb. 1991, pp. 108-112.
George Wolberg, Digital Image Warping, IEEE Computer Society Press, Los Alamitos, CA, pp. 129-133.
Nakamura et al., "Fast Calculation of the Coefficients of the Generalized McClellan Transform in 2-D FIR Filter Design", Circuits & Systems, 1993.
Hartnett et al., "On the Use of Cyclotomic Polynomial Prefilters for Efficient FIR Filter Design", IEEE Transactions on Signal Processing, vol. 41, No. 5, 1993.
Wong, "A Clustering Filter for Scale-Space Filtering and Image Restoration", Computer Vision and Pattern Recognition, 1993.
Jeong, "Adaptive Determination of Filter Scales for Edge Detection", IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 14, No. 5, 1992.
Zaulbaus et al., "Design of Signal Dependent Time-Frequency Kernels by McClellan Transformation", Tim-Frequency and Time Scale Analysis 1992 Int'l Symposium, 1992.
Adams et al., "New Quadratic Programming Algorithms for Designing FIR Digital Filters", Signals, Systems & Computers, 1993 27th Asilomar Conf., 1993.
Bomar et al., "Method for Accelerating the Design of Optimal Linear-Phase FIR Digital Filters", IEEE Transactions on Signal Processing, vol. 39, No. 6, 1991.
Murakosi et al., "Frequency Scramble for Secure Communication of Images Using Multidimensional Digital Filters", Circuits and Systems, 1992 Midwest Symposium, 1992.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for forming image scaling filters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for forming image scaling filters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for forming image scaling filters will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-204016

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.