Introduction to Digital Image Processing.ppt

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1、Introduction to Digital Image Processing,Shreekanth Mandayam ECE Department Rowan Universityhttp:/engineering.rowan.edu/shreek/spring03/cc/,March 4, 2003,Module Overview,Lecture 1 Digital Image Fundamentals Lecture 2 Digital Image Enhancement Digital Image Segmentation Digital Image Compression,Lect

2、ure 1,Digital Image Fundamentals,Monochromatic Digital Image,x,y,Gray Level,f(x,y),Sampling & Quantization,Sampling demos/demo1sampling_and_quantization/demo_sampling.mQuantization demos/demo1sampling_and_quantization/demo_quant.m,Digital Image Processing Course Nos. 0909-452-01 (Senior Elective) an

3、d 0909-552-01 (Graduate) Fall 2003Previous Offering: http:/engineering.rowan.edu/shreek/fall01/dip/,Fundamental Steps*,*Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, Addison-Wesley, 1992,Image Acquisition,Preprocessing (Enhancement & Restoration),Segmentation,Representation & De

4、scription,Recognition & Interpretation,Problem Domain,Knowledge Base,Result,Digital Image Enhancement,Point Processing (Intensity Transformation),s(x,y) = T r(x,y),Transformed Gray Level,Original Gray Level,Transformation Function,imadjdemo imadjust,Point Processing,Pixel OperationsPoint processingH

5、istogram equalizationConnectivity,individual pixels,all pixels,neighboring pixels,Point Processing,0,L-1,L-1,0,r,s,r,s,r1,r2,s1,s2,g,imadjdemo imadjust,Image Histogram,imadjdemo imhist,Histogram Equalization (Balancing),imadjdemo histeq,Fundamental Steps*,*Rafael C. Gonzalez and Richard E. Woods, Di

6、gital Image Processing, Addison-Wesley, 1992,Image Acquisition,Preprocessing (Enhancement & Restoration),Segmentation,Representation & Description,Recognition & Interpretation,Problem Domain,Knowledge Base,Result,Digital Image Segmentation,Spatial Filtering (Masking),R,Portion of a digital image,Mas

7、k,= w1z1 + w2z2 + +w9z9,Replace with,Edge Detection,Sobel Masks,edgedemo edge,demos/demo2spatial_filtering/edgegradientdemo.m,Fundamental Steps*,*Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, Addison-Wesley, 1992,Image Acquisition,Preprocessing (Enhancement & Restoration),Segmen

8、tation,Representation & Description,Recognition & Interpretation,Problem Domain,Knowledge Base,Result,Digital Image Compression,Discrete Cosine Transform,Information ConcentrationData CompactionFeature Extraction,Discrete Cosine Transform,dctdemo,JPEG Compression Standard,f(x,y),Level Shift,Compute DCT F(u,v),Normalize,Reorder to form 1-D Sequence,Compute DC Coefficient,Compute AC Coefficients,http:/www.jpeg.org/,Summary,Digital Image Processing Course Nos. 0909-452-01 (Senior Elective) and 0909-552-01 (Graduate) Fall 2003Previous Offering: http:/engineering.rowan.edu/shreek/fall01/dip/,