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T ................................... 8
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1.1.1. Gi u chung ........................................................................................... 8 i thi
1.1.2. Khái ni m v gi u tin trong nh s ............................................................... 8
1.1.3. L ch s gi u tin ............................................................................................. 9
u tin .................................................................................... 10
1.1.5. Các ch n h ng gi u tin ..................................................... 12 th
ng gi u tin..................................................................................... 12
1.1.7. Các thành ph n chính c a m gi u tin trong nh s ............................. 13 t h
1.1.8. Yêu c u thi t y i m ng gi u tin trong nh s ................... 13 i v t hth
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1.2.1. Gi u v ........................................................................................ 15 i thi
ng gi i pháp ................................................................................. 16
1.2.3. Nhi c ............................................................................... 16 m v a lu
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c v các lo i nh JPEG, GIF, PNG .................................................. 16
1.3.2. C u trúc nh Bitmap ................................................................................... 18
SB (Least Significant Bit) ....................................... 23
1.4.1. Khái ni m bit có tr ng s p LSB ........................................................... 23 th
1.4.2. Thu u LSB ................................................................... 24 t toán nhúng dli
..................................................................................................... 27
1.5.1. Qúa trình phát tri n ..................................................................................... 27
1.5.2. Nguyên t c .................................................................................................. 28
c th c hi n ..................................................................................... 28
1.5.4. An toàn c a thu ................................................................................ 29 t toán
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2.1.1. Yêu c u c d ng ........................................................................ 32 i s
2.1.2. Thông tin c n gi u ...................................................................................... 33
ng gi u tin..................................................................................... 33