Activity 2: Modify your color board
Workshop Resources
Example one: Make a diagonal
#This creates the original colorboard.
from PIL import Image
img = Image.new('RGB', (60, 30), 'red')
img.save('pil_red.png')
#This uses a nested while loop to change the picture.
x = 0
y = 0
while x < 10:
while y < 20:
img.putpixel( (x,y), (0, 0, 0))
x += 1
y += 1
img.save('pil_red.png')
This is the picture before changing.
This is the picture after changing.
Example two: Make a rectangle.
#This creates the original colorboard.
from PIL import Image
img = Image.new('RGB', (60, 30), 'red')
img.save('pil_red.png')
#This uses nested for loop to change the picture.
for x in range(10, 30):
for y in range(5, 25):
img.putpixel( (x,y), (0, 0, 0))
img.save('pil_redmodified.png')
This is the picture before changing.
This is the picture after changing.
Modifying your own colorboard!
Here are two templates to assist your colorboard modifications.
Template One: Adding a line
# Template for adding a line
initial_position_x = 0 #make change here
initial_position_y = 0 #make change here
width = 0 #make change here
height = 0 #make change here
color = (0,0,0) #make change here
while initial_position_x < width:
while initial_position_y < height:
img.putpixel( (x,y), color)
initial_position_x += 1
initial_position_y += 1
img.save('pixel-activity2.png')
Template Two: Adding a rectangle
# Template for adding a rectangle
initial_position_x = 0 #make change here
initial_position_y = 0 #make change here
width = 0 #make change here
height = 0 #make change here
color = (0,0,0) #make change here
for x in range(initial_position_x, width+initial_position_x):
for y in range(initial_position_y, height+initial_position_y):
img.putpixel( (x,y), color)
img.save('pixel-activity2.png')