1. Rolando V. RaqueñoSaturday, June 27, 2015 1 NetPBM Image Format Exercises http://netpbm.sourceforge.net/README

2. Rolando V. RaqueñoSaturday, June 27, 2015 2 Creating Sample NetPBM images Using the examples in the NetPBM man pages for pbm, pgm, and ppm –Use a text editor to create the corresponding sample images feep.pbm feep.pgm feep.ppm –If you are unfamiliar with using any of the UNIX text editors, startup the tutorial on the CIS systems % ~rvrpci/pub/vitutor/vitutor or check out http://ecn.www.ecn.purdue.edu/ECN/Documents/VI/ http://www.ncsu.edu/it/pub/tutorials/pico_tutor/pico.html –Use the xv utility to display these sample images

3. Rolando V. RaqueñoSaturday, June 27, 2015 3 Index Example Use the pnmindex routine –make a single image catalog of the images feep.pbm, feep.pgm, feep.ppm

4. Rolando V. RaqueñoSaturday, June 27, 2015 4 Rotate Example Taking the image feep.pbm you created –Rotate the image counter clockwise using one of the NetPBM utilities

5. Rolando V. RaqueñoSaturday, June 27, 2015 5 Flip Example Taking the image feep.pgm you created –Flip the image

6. Rolando V. RaqueñoSaturday, June 27, 2015 6 Cut example Taking the image feep.pgm –Cut out the subimage shown below

7. Rolando V. RaqueñoSaturday, June 27, 2015 7 Image Concatenation Example Taking the results from the previous slides –Index, Rotate, Flip, Cut –Concatenate the results of these processes into one image

8. Rolando V. RaqueñoSaturday, June 27, 2015 8 Histogram Example Compute the histogram of feep.pgm and plot it using any UNIX plotting utility Normalize the feep.pgm and repeat the histogram plot Based on the output of pgmhist –Come up with a strategy of how you might compute the following Min, max, sum, mean, variance, standard deviation –Do not try to implement anything yet, simply state in a stepwise manner what needs to be done –As we get exposed to other UNIX utilities, we will implement and write scripts that will compute these values.