![]() Compressed Image File Formats: JPEG, PNG, GIF, XBM, BMP $59.99 Several years ago, I received a grant to study steganography, which is the process of embedding secret messages in ordinary messages. In my case, I was working on changing the incidental bit values in image files so that they stored messages. Doing this requires a complete understanding of how the image files are stored and I used this book as my primary resource. From it, I found it easy to learn the basic bit patterns and structures used to store images and with that, I could write programs to manipulate the image files. Later, when I was teaching a course in computer security, one of the major exercises was in decrypting messages hidden in image files. My work in this area was presented at a national computer conference. Over the last two years, I supervised a research project with a student where he used neural networks to identify image files that contained text messages. The goal was to identify junk e-mail messages (spam) that were images of text. Such image files were used to defeat filters that would flag spam messages based on the presence of keywords. When he started the project, the first thing I did was give him a copy of this book so that he could understand the structure of the image files and learn what to code for. His project was a success; he presented his work at a regional computer conference. This book presents the structure of the primary types of image files in a manner that is easy to understand. As I have already mentioned, it was a primary resource for two successful research projects, so if you need to know the structure of image files, this is the first book that I would recommend. ![]() The Rolling Stones - Live at the Max (Large Format) $24.99 Supurb, one of the best Blu Ray concerts available. Picture quality A + the transfer has been well done. Sound quality in DTS HD Audio through a Yamaha AV Receiver and Tannoy speakers is excellent. The closest you will get to a Stones concert in your living room. TURN IT UP ALL THE WAY ! Recommended, just buy it.... ![]() Sculptures Et Grands Formats 1971 Jean-Paul Riopelle 17x28 $67.50 Title: Sculptures Et Grands Formats 1971. Artist: Jean-Paul Riopelle. Image Size: 17.00in. x 28.25in. Paper Size: 17.00in. x 28.25in.Popular Images has an unparalleled selection of both vintage and modern prints, posters, art prints, photographs and framed imagery. Our selections are ideal for both the office and home and we have over 400,000 images available for search or browsing. Your print is presented on premium, high grade paper and all framed selections are custom made to order. Orders are shipped to both domestic (US) and international locations. Decorate in style with our tasteful selection of modern and historic imagery. |
|