Assignment #2 Instructions: BMP Gain more experience with dynamic memory allocation and deallocation.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

BMP image processing program written in C. also must use getopt. Instructions and relevant code are in the ZIP file attached.

 

Assignment #2 Instructions: BMP 

Image Processing

Through this programming assignment, the students will learn to 

do the following:

1. Learn to read and write binary files.

2. Gain more experience with using pointers.

3. Gain more experience with dynamic memory allocation and 

deallocation.

In this assignment, you are asked to manipulate an image from a 

24-bit uncompressed bmp file. (The format of bmp files is given in 

http://en.wikipedia.org/wiki/BMP_file_format). To help with reading 

and writing the image file, you are given library functions and an 

example that deal with the bmp file (in a zip file). In the example, 

the image is flipped horizontally. You are asked to implement 

some additional functions including the verticalflip(), enlarge() and 

rotate() functions: the first flips the image vertically, the second is 

used to enlarge the image by an integer scale factor of 2 or 3; the 

last one is used to rotate the image either clockwise by 90 

degrees or counter-clockwise by 90 degrees.

The program should take the follow command-line options:

% bmptool [-f | -r | -l | -s scale| -v ] [-o output_file] 

[input_file]

Where -s means to scale the image by a scale factor of 2 or 3 as 

indicated on the command line with a 2 or a 3, -r means to rotate 

the image by 90 degrees clockwise, -l means to rotate the image 

by 90 degrees counter-clockwise, -v means to flip the image 

vertically and -f means to flip the image horizontally. You can 

assume for each type (-s, -r, - l, -f, or -v), the command line has at 

most one option, but that should not affect your code. Only 

implement each one one time no matter how many times it is 

included. However, the user may present a combination, say, 

'bmptool -r -s -l -f -v'. If multiple option types are present, the order 

for processing the image is that you do scale first, then any rotate 

options, and then flip vertically and finally flip horizontally.

You are required to use getopt() to process the command-line. If '-

o output_file' is missing, use standard output. If 'input_file' is 

missing, use standard input. The options to use standard input or 

standard output will only be used when chaining commands. 

Make sure the program returns 0 on success. In that case, one 

can 'chain' the commands using pipes, like:

% bmptool -s 2 1.bmp | bmptool -r | bmptool -f -o 2.bmp

Your program needs to provide necessary sanity-check for 

command line arguments and handle various error conditions and 

prompt the user with helpful information. You need to use getopt() 

to process the command line arguments. Test your program with 

various combinations to make sure it works as expected. You 

must use dynamic memory to store the content of the new image 

before writing out to file. You need to reclaim memory afterwards 

to prevent memory leaks. Please submit your work through 

Canvas as one zip file called FirstnameLastnameA2.zip. Follow 

the instructions below carefully (to avoid unnecessary loss of 

grade). Include your source code, your Makefile, the bmplib files 

that I have provided, and the example.bmp file in the zip file. I 

should be able to create the executable by typing ‘make’. The 

Makefile should also contain a 'clean' target for cleaning up the 

directory (removing all object files). Make sure you don't include 

intermediate files: *.o, executables, *~, etc., in your submission. 

(There'll be a penalty for including unnecessary intermediate 

files).

Please make sure you submit homework before the deadline. 

There will be a late penalty as per the syllabus.

If the program does not compile and do something useful 

when it runs it will not earn any credit.

bmplib

Download bmplib

(Zip file) - files needed to complete this assignment.

Attachments:

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