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#1
December 9th, 2012, 07:05 PM
 xorachelannx3
Registered User

Join Date: Dec 2012
Posts: 1
Time spent in forums: 23 m 14 sec
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Cropping a part of one picture and then scaling it up larger onto another part of img

# Date: December 14, 2012

# FinalExam_FLast.py

##### Template for CIS 150 Final Exam Lab ######

# ********** Final Exam **********

# Do your work for the Final Exam Lab below this comment by placing
# Function finalExam goes below this comment

def finalExam():
imageA = makePicture('imageA.jpg')
imageB = makePicture('imageB.jpg')
imageC = makePicture('imageC.jpg')
# All Program code is to be placed immediately below this comment

canvasY = 0
for sourceY in range(0, getHeight(imageB)):
canvasX = 0
for sourceX in range(0, getWidth(imageB)):
sourcePx = getPixel(imageB, sourceX, sourceY)
canvasPx1 = getPixel(imageC, canvasX, canvasY)
canvasPx2 = getPixel(imageC, canvasX+1, canvasY)
canvasPx3 = getPixel(imageC, canvasX, canvasY+1)
canvasPx4 = getPixel(imageC, canvasX+1, canvasY+1)
color = getColor(sourcePx)
setColor(canvasPx1, color)
setColor(canvasPx2, color)
setColor(canvasPx3, color)
setColor(canvasPx4, color)
canvasX = canvasX +2
canvasY = canvasY +2
repaint(imageC)
show(imageC)
return imageC

show(imageC)

# If your finalExam function is using any other function(s)
# you should copy those function below this comment.

This is the error i'm getting :

>>> finalExam()
getPixel(picture,x,y): x (= 300) is less than 0 or bigger than the width (= 299)
The error was:
Inappropriate argument value (of correct type).
An error occurred attempting to pass an argument to a function.
Please check line 26 of /Users/xorachelannx3/Desktop/CIS150-Programming/CIS 150 FINAL EXAM LAB/FinalExam_RGrass.py

Not sure why this doesn't work, i've set my media path to the location of those images. anyone have any ideas on what is going wrong?

#2
December 10th, 2012, 09:11 AM
 b49P23TIvg
Contributing User

Join Date: Aug 2011
Posts: 4,132
Time spent in forums: 1 Month 3 Weeks 2 Days 5 h 47 m 38 sec
Reputation Power: 455
Without knowing anything about makePicture let's guess

canvasX = canvasX +2

is a problem, you should go to half width and half height?

You could kludge with
try:
except:
statement.

good luck!
__________________
[code]Code tags[/code] are essential for python code!

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