Tài liệu Image and Videl Comoression P1 pptx

... considering that they play a key role 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. ... reconstructed image and video is application dependent. In medical diagnoses and some scientific measurements, we may need the reconstructed image and video to...

Ngày tải lên: 22/12/2013, 21:18

... 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 the JPEG standards ... video-coding standards and were discussed in Chapters 7 and 8, respectively, we include them here for completeness of all international image and video coding standards. • JPEG Standard:...

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

... Process., 3445-3462, Dec. 1993. Vetterli, M. and J. Kovacevic, Wavelets and Subband Coding, Englewood Cliffs, NJ: Prentice-Hall, 1995. Woods, J., Ed., Subband Image Coding, Kluwer Academic Publishers, ... dependencies of subbands; the arrow points from the subband of the parents to the subband of the children. At top left is the lowest-frequency band. (Right) The scanning order of the s...

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 ... a zigzag sequence and then divided into several bands. A frequency band is defined in the scan header by specifying the starting and ending indexes in the zigzag sequence. The band conta...

Ngày tải lên: 19/01/2014, 20:20

... 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 ... black and white. The resolution of these binary tone images is usually very high. In each scan line, there are many consecutive white and black pixels, i.e., many alternate white runs...

Ngày tải lên: 19/01/2014, 20:20

... wide applications in image and video coding and have been adopted in the international still image coding standard JPEG and video coding standards H.261, H.263, and MPEG 1 and 2. When some source ... bilevel image coding (Langdon and Rissanen, 1981) and adopted by the international standards for bilevel image compression, JBIG. It has also been adopted by the internation...

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 ... has been very efficient and was adopted by the international video coding standards H.261, H.263, and MPEG 1, 2, and 4. 4.6 SUMMARY In transform coding, instead of the original ima...

Ngày tải lên: 19/01/2014, 20:20

... the “boy and girl” image (refer to Figure 1.1) and its difference image obtained by horizontal pixel-to-pixel differ- encing, shown in Figure 3.1(a) and (b), respectively. Figure 3.1(b) and its ... important role in image and video coding. In the international coding standard for still images, JPEG (covered in Chapter 7), we can see that differential coding is used in the loss...

Ngày tải lên: 19/01/2014, 20:20