Question

Help on python:

If the function name is "widen", with the parameter "picture" and the return type being a picture, return a new picture that is twice as wide as the given picture. For each pixel (x, y) in the original picture, the pixels (2 * x, y) and (2 * x + 1, y) in the new picture should be set to the same color as it.

Can someone please help me? I cant seem to do this. (btw, we cannot use the PIL)

Answer 1

xy coordinates suggest a list of lists as the data structure. For all the color datum in the horizontal, just add it twice to the horizontal of a new list of lists.

Answer 2

Yes I understand that but I don't get how you would set the function. I'm a beginner at Python so I don't know how to set the function properly. I also don't get why in the question 1 is added to 2*x in the x-coordinate?

Answer 3

TBH, ( 2 * x, y ) suggests to me that the image becomes two images side by side. If you just want to distort the image to be twice as wide, reading ( x, y ) from the input picture and writing x to ( x, y ) and ( x +1, y ) in a new image ( to be returned from the function ) will make it twice as wide.

The Python syntax for a function would be:

def widen( inputPicture ):
# make the new picture
return( outputPicture )

And would be called something like:

fatPicture = widen( thinPicture )

I don't know what else to say without writing the code for you without a more specific question.