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=====   COMP2720   =====   Semester 2, 2006   =====   Lab sheet  =====
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Student name: Dean Dal Broi
Student Uni ID: u4222206
Lab goup: Tue 10-12 
Tutor: Peter Christen
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Lab number: 2
Date: 9/8/06
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Downloaded all required files from comp2720 webpage and ready to go for
the lab.

Part 1

Ran the halfAndCopy function. The function asks for a media path, it 
then takes the picture flower400x400.jpg from that path. it then prints
out that picture and scales its size down by half and prints that column
by column on a new canvas.

Majorly commented the function to increase my understanding of its 
operation.

Made the halfAndCopy function into halfAndDouble by adding the following 
line of code into the loop that creates a new column:

 setColor(getPixel(targetPict, targetX + getWidth(sourcePict)/2, targetY), color) 
	#set the color of the duplicated pixel in the source picture


so this creates a new column halfway through the blank picture.

Created quarterAndCopy, did this by modifying halfAndCopy to read every 
4th column and every 4th row from the source picture. The quality of the 
picture is also decreased as the pixels are not being averaged thus we are 
loosing lots of data from the original picture.

Created halfAndCenter, did this by modifying the target picture to be 
400x400, and then to start creating the new pixels in the target at 100,100 
which is 1/4 of the original image width and 1/4 of the original image height.

Modified the halfAndCenter function to allow it to be run on the same picture 
twice, it results in the original picture be scaled down twice and thus you 
have a very small picture returned.

Added the save function to halfAndCenter so that the picture is saved to the 
file modifiedPic.jpg in the media path that is set at the beginning of the 
function.

Part 2.

Loaded and ran the blur.py program. Noticed that it did in fact do what it was 
suppost to, that was bluring the original image.

Created the blurSquare function by modifying the blur function to read an extra 
4 pixels and take those into consideration when creating the new color for each 
blured pixel.

Created the blurLargeCross function by slightly modifying my blurSquare function 
to chage the places where the 4 extra pixels are read from, I also had to modify 
the loops as follows:

  for x in range(3,getWidth(source)-1):
    for y in range(3,getHeight(source)-1):

The original blur function only does a very basic blur that can be hard to notice, 
the square blur function improves on this and produces a more easily notice outcome. 
However the LargeCross blur function produces an outcome that is very noticable.

Have had a look at the line detect function and have commented the code to explain 
how it works. I then played around with the threshold values placing different 
values for each condition, only to notice that it changes where the black pixels
are placed.

I then found a set of threshold values that I liked, 10 and 10 and saved a picture 
from running the function with those values.

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