by Steve Walton
Is seeing really believing anymore? Can we trust images as evidence of true events? The answer is generally "no," although image-authentication algorithms do make it possible to tell whether or not an image has been modified. Steve describes and implements a class of algorithms that makes it possible to authenticate digital images.
by Paul J. Martino
Combinatorial optimization involves finding the optimal solution to problems such as computer wiring and the now-familiar traveling-salesman problem. Paul presents a heuristic that's efficient and portable.
by David Charlap
In last month's installment of this two-part article, David examined how the "standard" BMP file format has been implemented differently on different platforms. This month, he explains how to use the structures to read and interpret bits.
by David Perelman-Hall
David describes and implements an object-oriented method of enacting a constraint system, which has been adapted from directed acyclic graph unification. Although he implements this approach for a natural-language parsing system, it can be used in applications as well.
by Dutch Guckenberger, Liz Guckenberger, Frank Luongo, Kay Stanney and Jose Sepulveda.
The hyper-time algorithm lets you alter the flow of "simulated time" to benefit users--slower than real time can be used for novice users, while faster than real time can be used for experts or persons "time surfing" over uninteresting portions of information. Applying the algorithm to "Above-Real-Time Training" also improves human performance, increases retention and training-device effectiveness, and decreases stress.
by Robert A. Duffy
Robert presents a C++ foundation for Internet client applications running on Windows. In doing so, he implements a mail client that understands the Post Office Protocol (POP), a powerful Internet protocol for processing e-mail.
by Ted Faison
In examining the recently released Borland C++ 4.5, Ted focuses on its OLE 2.0 support, using it to create an OLE server that he then embeds into a Word for Windows 6.0 document.
by Chane Cullens
Serialization is the process of writing or reading one or more objects to or from a persistent-storage medium, such as a disk file. Chane examines MFC's serialization mechanism and what it offers cross-platform developers.
by Michael Swaine
Michael takes a look-see at what's new with visual programming.
by Al Stevens
Al analyzes the C++ Standard Template Library (STL), then wraps up his text-search project by discussing the C source-code module of the interface between the Visual Basic front end and the Windows DLL that implements the search engine.
edited by Bruce Schneier
In this month's "Algorithm Alley," Kim Larsen presents a simple yet clever approach for computing the correct day of the week.
edited by Andrew Schulman
Tim unravels the floating-point-division algorithm that Intel didn't quite implement correctly with its Pentium processor.
by Al Stevens
In last month's "Programmer's Bookshelf," Al examined Adrian King's Inside Windows 95. This month, he dives further into Windows 95 when he looks at Andrew Schulman's Unauthorized Windows 95.
by Jonathan Erickson
by you
by Michael Swaine
by Monica E. Berg
Copyright © 1995, Dr. Dobb's Journal