Class 37 — November 28

Image manipulation

I need a haiku — I can't think of one I like — Will you please help me

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Importance of following directions ( I feel bad for the driver)

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Look both ways

• Back or ahead

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Task

• Add two functions each to your modules dim.py and locate.py

• Define a function pixelate() in module effect.py

• To test your functions use progam photo_ops.py

• Redownload manip.py

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Module dim.py

• Functions to be added

• shrink( orig )

• Returns the dimensions of an image that would be half that of image orig

• enlarge( orig )

• Returns the dimensions of an image that would be twice that of image orig

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Module locate.py

• Functions to be added

• shrink( spot, w, h )

• Returns a new correspondent location ( a, b ) for spot, where the dimensions in the correspondent image are twice that of w and h

• enlarge( spot, w, h )

• Returns a new correspondent location ( a, b ) for spot, where the dimensions in the correspondent image are half that of w and h

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Module effect.py

• Function to be added

• pixelate( orig )

• Returns a new image that is a 16 by 16 scaling of a 1/16 by 1/16 scaling of orig

• You should find module manip.py functions zoom_in() and zoom_out() helpful.

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© 2019 Jim Cohoon

Resources from previous semesters are available.