1
Roy L Adler, Bruce P Kitchens, Charles P Tresser, Chai W Wu: Compressed image authentication and verification. International Business Machines Corporation, Stephen C Kaufman, McGuireWoods, August 14, 2001: US06275599 (170 worldwide citation)

A watermarking method involves mostly invisible artifacts and is sensitive to any modification of the picture at the level of precision rendered by the compressed version of the image. The image is compressed according to a known compression standard, such as the JPEG standard, and with a fixed qual ...


2
Roy L Adler, Martin Hassner, John P Moussouris: Method and apparatus for generating a noiseless sliding block code for a (1,7) channel with rate 2/3. International Business Machines Corporation, Roy R Schlemmer, November 1, 1983: US04413251 (74 worldwide citation)

An algorithm and the hardware embodiment for producing a run length limited code useful in magnetic recording channels are described. The system described produces sequences which have a minimum of 1 zero and a maximum of 7 zeros between adjacent 1's. The code is generated by a sequential scheme tha ...


3
Roy L Adler: Key controlled block cipher cryptographic system. International Business Machines Corporation, Roy R Schlemmer Jr, March 10, 1981: US04255811 (54 worldwide citation)

A cryptographic system for encrypting a block of binary data under the control of a key consisting of a set of binary symbols. The cryptographic system may be utilized within a data processing environment to ensure complete privacy of data and information that is stored or processed within a computi ...


4
Roy L Adler, Martin Hassner: Method and apparatus for generating a noiseless sliding block code for a (2,7) channel with rate 1/2. International Business Machines Corporation, Roy R Schlemmer, July 31, 1984: US04463344 (35 worldwide citation)

An algorithm and the hardware embodiment for producing a run length limited code useful in magnetic recording channels are described. The system described produces sequences which have a minimum of 2 zeros and a maximum of 7 zeros between adjacent 1's. The code is generated by a sequential scheme th ...


5
Roy L Adler, Peter A Franaszek, Martin Hassner, Richard C Schneider: Dual channel partial response system. International Business Machines Corporation, George E Clark, Thomas P Dowd, September 2, 1986: US04609907 (25 worldwide citation)

Method and apparatus is described for encoding and decoding a stream of randomly distributed binary bits representing digital data, including an encoder for encoding the bit stream to achieve a run length limited, partial response coding of the stream; a recording medium for recording the encoded st ...


6
Roy L Adler, Marco Martens, Joan L Mitchell, Nenad Rijavec, Robert H Risch, Charles P Tresser, Chai W Wu: Constrained digital halftoning. International Business Machines Corporation, Stephen C Kaufman, Whitham Curtis & Christofferson P C, August 5, 2003: US06603573 (6 worldwide citation)

A method and apparatus for halftoning digital images renders color data subject to constraints on the number of colorants which can be deposited on a single pixel and constraints on consecutive pixels rendered with the same color. The color data to be rendered is mapped into a second data set in an ...


7
Roy L Adler, Jean Pierre Dedieu, Alan D Kalvin, Joseph Y Margulies, Marco Martens, Michael Shub: Computation of shapes of three-dimensional linkage structures based on optimization techniques. International Business Machines Corporation, Stephen C Kaufman, Whitham Curtis & Christofferson P C, December 9, 2003: US06662148 (5 worldwide citation)

Spinal modeling is based on a concept called spinal energy which assumes that the spine assumes a shape to minimize spinal energy. Spinal energy depends on parameters called stiffness coefficients. These parameters can be determined from human data which, by hypothesis, are universal for a large cla ...