PPT-Huffman coding By: Justin Bancroft

Huffman coding is the most efficient way to code DCT coefficients Quantized DCT coefficients What are the DCT coefficients before quantization They are the entries of the DCT matrix What are the DCT coefficients after quantization. O Jones Building 25 Geography 26 Informatics T eaching Laboratories Joseph Priestley Building 41 Library 32 Law 36 Lockkeeper s Graduate Centre 42 Mathematical Sciences Occupational Health and Safety Directorate 12 The People s PalaceGreat Hall 16 Qu brPage 1br Huffman Codes Example Ot57569vio Braga brPage 2br Say e want to encode a text with the characters a Example Frequency 37 18 29 13 30 17 brPage 3br Total size is 37 brPage 2br Huffman Coding Given the statistical distribution of the gray levels Generate a code that is as close as possible to the minimum bound entropy A variable length code Huffman Coding Five steps 1 Find the graylevel probabilities for the ima Yancy. Vance . Paredes. Outline. Background. Motivation. Huffman Algorithm. Sample Implementation. Running Time Analysis. Proof of . Correctness. Application. Background. Lossless compression where around 20% to 90% of savings in space. Cynthia L. Boyer, Ph.D.. © 2011 Bancroft | All rights reserved. 2. By 2014 our distinct ability to deliver high quality individualized services in modern living, learning and working environments will exceed stakeholder expectations and secure Bancroft as the region’s elite provider of services to people with intellectual and developmental disabilities and brain injuries.. 2) You and your friend have decided to use rotational encoding to encrypt messages. However, you desire something more secure than a simple 1 in 26 key system. Inspired by the Germans in WWII you d Survival Tips and Strategies. Mary G. Brownsberger, Psy.D., ABPP, CBIST. November 2013. © . 2013 . Bancroft | All rights reserved. Happy Holidays. Our Ideal Images. Common Stress Triggers . “Ideal” vs. “Reality”. Haar. Transform. 4c8 – . Dr.. David Corrigan. Entropy. It all starts with entropy. Calculating the Entropy of an Image. The entropy of . lena. is = 7.57 bits/pixel . approx. Huffman Coding. Huffman is the simplest entropy coding scheme. Guns are cool. In The Beginning: The Barriers. Nervous about age gap. Unsure of common interests. Time constraints. Determining what to do for our Dyad experience. Do we trust and respect each other?. 1. Image. Rich info. from visual data. Examples of images around us. natural photographic images; . . artistic and engineering drawings. scientific images (satellite, medical, etc.). “Motion pictures” => video. Kent. 1. DEFLATE Algorithm. DEFLATE uses . a combination of the . . LZ77 algorithm. and . Huffman coding. . . 2. LZ77 Algorithm. The . LZ77 . algorithm . compresses . data that . has already appeared in the . DataSets. Data Compression. Prefix Codes. A . prefix code. is a variable length code in which no codeword is a prefix of another one. e.g. a = 0, b = 100, c = 101, d = 11. Can be viewed as a . binary . Idoia. . Ochoa . and . Nima. . Soltani. . Outline. System overview. Detailed encoder description. Demonstration. Results. Extensions. Conclusions. System Overview (Encoder). R. L. DWT. Quant. Arith. wwwuhsberkeleyeduwwwuhsberkeleyedu for adviceShandoutsClinicalHead Lice 1doc 3/2009Who gets lice and howAdult Louse Egg 2222 Bancroft Way wwwuhsberkeleyeduwwwuhsberkeleyedu for adviceShandoutsCli