Pillow

Creating images in Python

​Visual programming is essential in today's digital landscape, enabling effective communication and creativity.
It plays a pivotal role in web development, data science, and user experience design.

• Determine Colors by RGB Code

  • Understand RGB color representation.

  • Understand how to specify colors using RGB codes.

• Use PIL for Image Manipulation

  • Learn Image module commands in Pillow (PIL).

  • Explore loading, creating, resizing, and saving images.

• Apply Graphic Primitives

  • Discover how to use graphic primitives for drawing.

  • Create visual elements, such as lines, circles, and rectangles, in Python.

​Learning Objectives

• Web Development: Creating visually appealing websites and user interfaces.

• Data Science: Visualizing data and results for better understanding.

• Game Design: Developing graphics, animations, and interactive elements.

• Digital Art: Crafting digital illustrations, designs, and multimedia.

Visual programming is a versatile skill used in a wide range of fields, including:

• RGB (Red, Green, Blue) is a fundamental color model used in digital imaging.

• RGB codes represent colors by specifying intensity levels of each component (0 to 255):

  • (0, 0, 0) represents black.

  • (255, 255, 255) represents white.

  • Equal component values yield various shades of gray.

  • (255, 100, 100, 128) - ???

RGB Color Scheme

RGB in Python

• ​In Python, RGB colors are represented as tuples, like (255, 0, 0) for red.

• Python provides a straightforward way to work with RGB color codes.

Python Imaging Library

Python Pillow (python-pillow.org)

Pillow Library - Tutorial for Beginners | by Vaibhav Patel

• Pillow (PIL) is a Python Imaging Library that simplifies image processing.

• It offers a powerful set of tools for image manipulation and creation.

Introduction to PIL Library

Mini-research 1. Image Manipulation with PIL

• Explore commands in the Image module of Pillow:

• Installation

  • Load: Open and load images.

  • Create: Create new blank images.

  • Resize: Adjust image dimensions.

  • Save: Save modified images to files.

Multiple Choice

Which code snippet correctly opens an image file named "example.jpg" using the Pillow library?

• from PIL import Image img = Image.open("example.jpg")

• import Image img = Image.open("example.jpg")

• from Pillow import Image img = Image.open("example.jpg")

• import PIL img = PIL.open("example.jpg")

Multiple Choice

Which code snippet correctly resizes an image named "input.jpg" to 300x300 pixels using Pillow?

• from PIL import Image img = Image.open("input.jpg") img = img.resize((300, 300))

• from PIL import Image img = Image.open("input.jpg") img.resize((300, 300)).show()

• from PIL import Image img = Image.open("input.jpg") img.thumbnail((300, 300))

• from PIL import Image img = Image.open("input.jpg") img.resize(300, 300).show()

Multiple Choice

Which code correctly saves the image in "output.png" format using the Pillow library?

• from PIL import Image img = Image.open("input.jpg") img.save("output.png")

• from PIL import Image img = Image.open("input.jpg") img.save("output.jpg")

• from PIL import Image img = Image.open("input.jpg") img.save("output.png", format="JPEG")

• from PIL import Image img = Image.open("input.jpg") img.save("output.png", format="PNG")

Introduce graphic primitives, essential for creating drawings:

• Lines: For straight-line segments.

• Circles: To draw circles and ellipses.

• Rectangles: To create rectangular shapes.

• Complex Graphic Composition

Mini-research 2. Graphic Primitives

Drawing with PIL

• Provide code examples for drawing shapes and lines using PIL:

  • Demonstrate how to create visuals within Python scripts.

  • Showcase examples of drawings.

Multiple Choice

What will be the result of the following code?

from PIL import Image img = Image.new("RGB", (200, 100), (255, 0, 0)) img.show()

• It creates a white image

• It creates a black image.

• It creates a red rectangle.

• It raises an error.

Multiple Choice

Which code snippet creates a new image with a blue background and size 400x300 pixels using Pillow?

• from PIL import Image img = Image.new("RGB", (400, 300), (0, 0, 255))

• from PIL import Image img = Image.new("RGBA", (400, 300), (0, 0, 255, 255))

• from PIL import Image img = Image.new("RGB", (400, 300), (255, 0, 0))

• from PIL import Image img = Image.new("RGB", (300, 400), (0, 0, 255))

Task 1

Check if Pillow library is

installed on your

computer.

If yes, uninstall using

pip uninstall pillow

command in command

line

Install using pip install

pillow command in

command line

Task 2

• Choose any image.

• Determine the size of image using

Pillow

• Determine the color of the left-top

pixel using Pillow

• Check the output with Photoshop (if

you have)

Task 3

Create this rectangle using Pillow

with given parameters. Size 200 x

200, color blue (try other colors

using RGB). And save it on

desktop.

Task 4

Draw a line using Pillow

Capabilities of Pillow library

https://www.youtube.com/watch?v=5QR-

dG68eNE&ab_channel=ClearCode

Watch a video to see other capabilities of library in

practice.

Task 5

Create a beautiful image using

the Pillow and your creativity.