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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: Wed 10-12
Tutor: Peter Christen
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Lab number: Homework 1
Date: 16/9/06
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Have downloaded all required files, Moving onto part 1.

Part 1.

Q1. Have read the program blend.py and have understood it. It reads the
two thailand pictures, Then it creates an empty canvas to put them in.
It then copies the part of the first picture not included in the overlap
into the empty canvas, It then puts the overlap section into the empty
canvas. It calculates the color of the pixels for the overlap by taking 
50% of each color value from the 2 original images and combining it to 
form 1 color. Then lastly the section of the second picture that is not 
included in the overlap is copied into the canvas.

Q2. Created the blendBetter function, I also included and input for the 
2 blend factors..eg you can choose to have 90% of picture 1 showing and
only 10% of picture 2 in the blended section.

The actual blended section of the new picture was difficult to achive,
I had to add two 'If statements' into the main loop copying the blended
section to ensure that if the first picture wasnt overlapping the second
that only it was copied and vice versa.

Q3. Ran the chromakey program with the 2 required pictures and noticed 
that it produced an ordinary result with alot of ocean floor remaining
in the picuture and lots of the shark cut out.

Q4. I modified the chromakey program to produce a much nicer result, 
the modification to the IF satatement is below:

      # Define blue: If the greenness < blueness
      if (getGreen(p)+10) < (getBlue(p)):
        # if theres alot of blue 
        if ((getBlue(p)) > 100):
           # Then grab the pixel from the new background
           setColor(p, getColor(getPixel(bg,x,y)))

Q5. Tried to run the chromokey program with the flow picuture an as
expected it didnt work well because we should be looking to remove
green and brow not blue. Thus I modified the contents of the main
loop as below for the program to produce a desirable result:

      # Define background: If the redness < greenness
      if (getRed(p)) < (getGreen(p)):
        # Then grab the pixel from the new background
        setColor(p, getColor(getPixel(bg,x,y)))
      # Define background: If the theres alot of brown
      elif ((getBlue(p) + getGreen(p)) > (getRed(p))):
        # Then grab the pixel from the new background
        setColor(p, getColor(getPixel(bg,x,y)))

Part 2.

Q1. Have loaded and run the coolpic.py function, I then added comments 
to the code and then saved it.

Q2. Created coolpicB by incrementing the position at which the rectangle
was to be drawn at with each cycle of the loop

Q3. Completed the 2 additional coolpics with commenting through the 
programs so they can be understood.

Q4.The program produces a black image. This is because the rectangles
are being drawn on black and thier border is black, thus we see nothing
And easy fix would be to draw a filled white rectangle over the 
background.

Q5. After fixing the program it produced the same image as figure 5.17
in the text book.

Q6. Created a picture similar to the example picture. I used 4 separate
loops to create the rectanges in each of the corners. and the the addText
function for my name and the addLine function for the triangle. The code
is commented and fairly self explanitory.

Q7. Created a drawing using elements from the coolpics and from the 
myName pic, All code is commented.


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