Tài liệu Image and Videl Comoression P10 ppt

... the international video coding standards: ISO, MPEG-1 and MPEG-2, and ITU H.261, and H.263. These standards will be introduced in detail in Chapters 16, 17, and 19, respectively. It is interesting ... between multigrid and multiresolution structures: both are hierarchical in nature and the splitting and merging can be easily performed. An example of an image decomposition and...

Ngày tải lên: 25/01/2014, 13:20

... in image and video compression. * In this book, the terms image and video data compression, image and video compression, and image and video coding are synonymous. © 2000 by CRC Press LLC and (1.19) In ... reconstructed image and video is application dependent. In medical diagnoses and some scientific measurements, we may need the reconstructed image and video t...

Ngày tải lên: 22/12/2013, 21:18

... fact that there are several international standards concerning still image coding (for both bilevel and multilevel images), a brief summary of them and a performance comparison have been presented ... is also used in the UNIX Compress command. 6.5 INTERNATIONAL STANDARDS FOR LOSSLESS STILL IMAGE COMPRESSION In the previous chapter, we studied Huffman and arithmetic coding techniques...

Ngày tải lên: 19/01/2014, 20:20

... the image G and the basis image I u,v (Wintz, 1972). Note that basis images have nothing to do with the input image. Instead, it is completely defined by the transform itself. That is, basis images ... estimation; subimage sizes of 4, 8, and 16 are used most often. In particular, N = 8 is adopted by the international still image coding standard, JPEG, as well as video coding standa...

Ngày tải lên: 19/01/2014, 20:20

... several digital binary images and compute their entropies. If one image has almost equal number of zeros and ones and another has a different number of zeros and ones, which image has larger entropy? ... related standards include JPEG standards, MPEG-1,2,4 standards, and H.261 and H.263 video teleconfer- encing coding standards as shown in Table 15.2. It should be noted that t...

Ngày tải lên: 25/01/2014, 13:20

... techniques. The pioneering Netravali and Robbins algorithm and several other algorithms such as the Bergmann (1982), the Cafforio and Rocca, the Walker and Rao, and the Bergmann (1984) are discussed ... very small. 12.4.4 THE WALKER AND RAO ALGORITHM Walker and Rao developed an algorithm based on the steepest descent method (Walker and Rao, 1984; Tekalp, 1995), and also with...

Ngày tải lên: 25/01/2014, 13:20

... input image and video are to be encoded. It is not necessary that the original image and video waveform be quantized and coded: we will show that some formats obtained from the input image and ... coding and has a direct impact on the bit rate and the distortion of reconstructed images or videos. We discuss concepts, principles and various quantization techniques which inc...

Ngày tải lên: 22/12/2013, 21:18

... coding are the image modeling, image analysis, and image synthesis techniques. Both image analysis and synthesis are based on the image model. The image modeling techniques used for image coding ... Lundmark, and R. Forchheimer, Image Sequence Coding at Very Low Bitrates: A Review, IEEE Trans. Image Process., 3(5), 1994. Li, W. and Y. Zhang, Vector-based signal proce...

Ngày tải lên: 19/01/2014, 20:20

... of image compression system under development by Joint Photographic Experts Group for still image coding. This standard is intended to meet a need for image compression with great flexibility and efficient ... computer-generated imagery or computer graphics. Compound documents: the new coding standard is desired to be capable of compressing both continuous-tone and bilevel images. The...

Ngày tải lên: 19/01/2014, 20:20

... CRC Press LLC Still Image Coding Standard: JPEG In this chapter, the JPEG standard is introduced. This standard allows for lossy and lossless encoding of still images and four distinct modes ... second layer, and 0.1 bits per pixel at the third layer). REFERENCES Digital compression and coding of continuous-tone still images. Requirements and Guidelines, ISO-/IEC Internat...

Ngày tải lên: 19/01/2014, 20:20