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كمبيوتر وملاحقاته كيف يعمل نظام التعرف على الوجه تاريخ النشر كتب بواسطة: د.حازم سكيك الزيارات: 20838   تعتمد بعض انظمة الحماية في المطارات والفنادق الضخمة على انظمة حماية متطورة تستخدم فيها انظمة كمبيوتر تستطيع ان تتعرف على الاشخاص المتواجدين والغير مرغوب فيهم مثل اللصوص والمشاغبين، فيستطيع رجال الامن فوراً وخلال فترة وجيزة من القاء القبض عليهم. وتعتمد هذه الانظمة قواعد بيانات لصور الاشخاص المجرمين واللصوص وغيرهم ويقوم برنامج الكمبيوتر بمقارنة الصور التي تلتقطها كاميرات المراقبة بقاعدة البيانات للتعرف على ما اذا كان احداً غير مرغوب فيه موجود في المكان أم لا.   ان هذا الشرح البسيط يخفي خلفه الكثير من العمليات المعقدة التي سوف نتناولها بالشرح والتوضيح في هذا المقال. في العام 2001 تم استخدام اول نظام للتعرف على الأوجه في ولاية امريكية للتقليل من الجريمة.  ولكن هذا النظام فشل في التعرف على اي من المجرمين، حيث انه لم يتمكن من الحصول على صور واضحة لهم وخصوصاً عند استخدامهم للاقنعة.  كما تم في مطار بوستن بامريكا عمل تجربة اخرى لنظام اكثر ت

COLORIZATION Colorization is a computerized process that adds color to a black?and?white movie or TV program. The process was invented by Wilson Markle and was first used in 1970 to add color to monochrome footage of the moon from the Apollo mission. In 1983, Markle founded Colorization, Inc. The word "colorization" soon became a generic name for the adding of color to black?and?white footage . The process of colorizing a movie begins with a monochrome film print, preferably a new print struck from the original negative. From the film print, a high?quality videotape copy is made. Technicians, aided by a computer, determine the gray level of every object in every shot and note any movement of objects within shots. A computer adds color to each object, while keeping gray levels the same as

Tutorial: Making Music with MIDI Part 1: Benefits of MIDI How To Do It Unlike MP3 files and CDs, MIDI files contain individual instructions for playing each individual note of each individual instrument. So with MIDI it is actually possible to change just one note in a song, or to re-orchestrate an entire song with entirely different instruments. And since each instrument in a MIDI performance is separate from the rest, its easy to isolate individual instruments and study them for educational purposes, or to mute individual instruments in a song so that you can play that part yourself .  Here are just some of the tangible advantages of using MIDI for active music-making. Play with "a band" Learning to play a musical instrument is one of the most rewarding things people can do. But why play by yourself when you can play along with a band? Standard MIDI Files are available for many p

Tutorial: MIDI and Music Synthesis Introduction The Musical Instrument Digital Interface (MIDI) protocol has been widely accepted and utilized by musicians and composers since its conception in 1983. MIDI data is a very efficient method of representing musical performance information, and this makes MIDI an attractive protocol not only for composers or performers, but also for computer applications which produce sound, such as multimedia presentations or computer games. However, the lack of standardization of synthesizer capabilities hindered applications developers and presented new MIDI users with a rather steep learning curve to overcome. Fortunately, thanks to the publication of the General MIDI System specification, wide acceptance of the most common PC/MIDI interfaces, support for MIDI in Microsoft WINDOWS and other operating systems, and the evolution of low-cost music synthesizers, the MIDI protocol i