compose a function called scale(image, scale_factor) based on the code given, that rescales due to a scale factor.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

import sys

import stddraw

from picture import Picture

fil = sys.argv[1]

wT = int(sys.argv[21)

hT = int(sys.argv[3])

source Picture (f il)

target = Picture(wT, hT)

for colT in range(wT):

for rowT in range(hT):

colS colT * source.width() ¡I wT

rowS = rowT * source.height() II hT

target.set(colT, rowT, source .get(colS, rowS))

stddraw. setCanvasSize(wT, hT)

stddraw . picture (target)

stddraw. show ()

Based on this code, compose a function with the following definition:

def scale(image, scale_f actor): that accepts a Picture object (not a string, pass the actual Picture object) and a floating-point scale factor, and returns a new Picture object that contains the image contained in the argument, but with its dimensions scaled by the specified factor. For example, if a 500-by-5(X) pixel image is used as input, and a scale factor of 2.0 is specified, the returned Picture object should be 1000-by- 1000 pixels in size.

Once this function has been defined, write the main function that takes a filename and a scale factor as command-line arguments, and then calls the scale function using those inputs, and then displays the resulting scaled image. Call this file scale_test. py.

Attachments:

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