Tài liệu Image and Videl Comoression P1 pptx
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 codingare synonymous. ... reconstructed image and video is application dependent. In medicaldiagnoses and some scientific measurements, we may need the reconstructed image and video tomirror the original image and video. ... in many classic optics and digital image processing texts.The RGB model is used mainly in color image acquisition and display. In color signal processingincluding image and video compression,...
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Tài liệu Image and Videl Comoression P14 pptx
... relatedstandards 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 videocoding standards.• JPEG Standard: Since ... several digital binary images and compute their entropies. If one image has almostequal number of zeros and ones and another has a different number of zeros and ones,which image has larger entropy?...
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Tài liệu Image and Videl Comoression P2 doc
... input image and video are to be encoded. It is not necessarythat the original image and video waveform be quantized and coded: we will show that someformats obtained from the input image and ... coding and has a direct impact on the bit rate and the distortion of reconstructedimages or videos. We discuss concepts, principles and various quantization techniques whichinclude uniform and ... original image and video.Note that the term transformation in Figure 2.3(a) is sometimes referred to as mapper and signal processing in the literature (Gonzalez and Woods, 1992; Li and...
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Tài liệu Image and Videl Comoression P9 doc
... coding are the image modeling, image analysis, and image synthesistechniques. Both image analysis and synthesis are based on the image model. The image modelingtechniques used for image coding ... Lundmark, and R. Forchheimer, Image Sequence Coding at Very Low Bitrates: A Review, IEEETrans. Image Process., 3(5), 1994.Li, W. and Y. Zhang, Vector-based signal processing and quantization for image ... areas ofdigital image processing such as image segmentation, image synthesis, and computer graphics, butonly in recent years have they been extended to the applications of image compression...
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Tài liệu Image and Videl Comoression P8 docx
... 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 theparents to the subband of the children. At top left is the lowest-frequency band. (Right) The scanning orderof the subbands for encoding ... algorithm and fractional bit-plane coding. © 2000 by CRC Press LLC constant bandwidth analysis of the STFT and the relative constant bandwidth wavelet transform isshown in Figure 8.2(a) and (b),...
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Tài liệu Image and Videl Comoression P7 doc
... CRC Press LLC Still Image Coding Standard: JPEG In this chapter, the JPEG standard is introduced. This standard allows for lossy and lossless encodingof still images and four distinct modes ... azigzag sequence and then divided into several bands. A frequency band is defined in the scan headerby specifying the starting and ending indexes in the zigzag sequence. The band containing the ... digital compression and coding of continuous-tone still images, or the ITU-T Recommendation T.81. JPEG became aninternational standard in 1992. The JPEG standard allows for both lossy and lossless...
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Tài liệu Image and Videl Comoression P6 ppt
... 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 comparisonhave been presented ... black and white. The resolution of these binarytone images is usually very high. In each scan line, there are many consecutive white and blackpixels, i.e., many alternate white runs and black ... international standards for lossless still image compression. For more details, readers arereferred to an excellent survey paper by Arps and Truong (1994).6.5.1 LOSSLESS BILEVEL STILL IMAGE COMPRESSION6.5.1.1...
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Tài liệu Image and Videl Comoression P5 pdf
... wide applications in image and videocoding and have been adopted in the international still image coding standard JPEG and videocoding 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 international still image coding standard,JPEG. ... (Pennebaker and Mitchell, 1992).5.4.5 APPLICATIONSArithmetic coding is becoming popular. Note that in text and bilevel image applications there areonly two source symbols (black and white), and the...
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Tài liệu Image and Videl Comoression P4 ppt
... the image G and the basis image Iu,v (Wintz, 1972).Note that basis images have nothing to do with the input image. Instead, it is completely definedby the transform itself. That is, basis images ... hasbeen very efficient and was adopted by the international video coding standards H.261, H.263, and MPEG 1, 2, and 4.4.6 SUMMARYIn transform coding, instead of the original image or some function ... original image in thespatial and/ or temporal domain, the image in the transform domain is quantized and encoded. Themain idea behind transform coding is that the transformed version of the image...
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Tài liệu Image and Videl Comoression P3 pdf
... 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. Inthe international coding standard for still images, JPEG (covered in Chapter 7), we can see thatdifferential coding is used in the lossless mode and in the ... in the previous frame and the estimated motion. The difference betweenthe original frame and the predicted frame thus generated and the motion vectors are then quantized and coded. If the motion...
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