CSN 455 - Image Processing               			Assignment 1 - Due Thursday, Feb. 7 

Please answer the following questions on a separate sheet of paper.  Each response should be preceded by the question it answers. State any assumptions.  Show all work.

1.  Digital images may be stored as pgm files.  The header information minimally consists (for greyscale and true color images) of three lines of ascii data as follows:
     		line 1:  a two-character file type identifier,                  
		line 2:  the number of columns followed by the number of rows,                 
		line 3:  the maximum value which occurs in the data area.     
These three lines are followed by the image data itself, which may be stored either in ascii format or in its raw numerical representation. 
    
How many 512x512 eight bit greyscale images can be stored in pgm raw format on a 1.44MB floppy disk?  (Assume the images are not compressed)  

How many 512x512 eight bit greyscale images can be stored in pgm ascii format on a 1.44MB floppy disk? (Assume the images are not compressed and that the actual pixel values in the image present a worst case scenario for ascii data, i.e. all three digit values)

How many 512x512 true color images can be stored in ppm raw format on a 1.44MB floppy disk?  (Assume the images are not compressed.)

How many 512x512 true color images can be stored in ppm ascii format on a 1.44MB floppy disk? (Assume the images are not compressed and that the actual pixel values in the image present a worst case scenario for ascii data, i.e. all three digit values)

    
2.  Why might one store an image in ascii format?