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COMP 1405/1005 (Fall 2022) − "Introduction to Computer Science I" Specification for Assignment 07

发布时间：2022-11-07

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COMP 1405/1005 (Fall 2022) − "Introduction to Computer Science I"

Specification for Assignment 07

Your submission for this assignment must include your full name and your nine-digit student number as a comment at the top of the sourcefile you submit. All source codefiles must be written using the Python 3 programming language.

Submissions that crash (i.e., terminate with an error) on execution will receive a mark of 0.

Officially, the Due Date for this Assignment is: Friday, November 4, 2022, at 11:59pm EST.

Late Submissions are Accepted Without Penalty Until Sunday, November 6, by 11:59pm EST.

Submissions received after that will not be accepted and will receive a mark of 0.

To further practice with nested looping control structures, for this assignment you will design and implement a program that performs a very elementary photomanipulation.

In order to complete this task, you will need to:

. read about pygame's "image.load"1, "mouse.get_pressed", and "mouse.get_pos" functions2

. read about the pygame Surface methods "get_size", "blit", "get_at", and "set_at"3

. choose whether you would like to implement a simple "negation" effect (below left) …

…or if you would prefer something more impressive, like "blur", "sharpen", or "edge detect"4

Your submission for this assignment:

. must be a source code file with filename 'comp1405_f22_#########_assignment_07.py'

. must initialize pygame, load image specified by the user, and use get_size to find its dimensions

. must create a window that is the correct size and then "blit" the loaded image

. must use the loop (below right) to repeatedly get input, apply the effect, and update the display

. must permit the user to use the mouse to specify a region of the image (i.e., by clicking)5

. must use nested loops, "get_at", and "set_at" to apply an effect to the region the user selected

the difference between the maximum colour component value (i.e., 255) and the red, green, and blue component values of a colour, can be used to get the the negated (or inverted) colour

e.g.,

(200, 100, 50)

becomes

(55, 155, 205)

exit_flag = False

while not exit_flag:

# loop body goes here

for e in pygame.event.get():

if e.type == pygame.QUIT: exit_flag = True