Class 35 — November 13

Image visualization

Caterpillars say – Life is a transformation – I agree with them

---

Look both ways

• Back or ahead

---

Agenda

• Image transformations

---

PyCharm gotchas

• When you paste a URL in reaction to a prompt, you must also type a space at the end of the line. Do not add a space at the beginning of the line.

• If your pasting URL has https://... rather than http://..., remove the s before hitting the enter key.

---

Example

• Module manip.py

• Supports several common image transformations – duplicating, mirroring, flipping, rotating, scaling, and pixelation. Except for the pixelation transformation, all of the transformations copy values from the original image into the transformation.

• See documentation for transform specifications.

• Note: manip.py supports limited self-testing

• Questions to ask yourself before attempting the transformations:

• How do the dimensions of the transformation compare with the original?

• What is the correspondence between the pixels from the transformation with pixels from the original?

---

Problem solving pattern

• Slide show

---

To do

• Homework 24

• Review imaging epistle
  
  

---

Transformations

Clockwise rotation
	scale with xfactor = 2.0 and yfactor = 2.0
	scale with xfactor = 0.5 and yfactor = 0.5
	scale with xfactor = 0.5 and yfactor = 2.0
	scale with xfactor = 2.0 and yfactor = 0.5
	pixelation