10.4: Pixels! (The Pixels Array) - Processing Tutorial

TL;DR

This video explains the concept of pixels in computer screens and how to manipulate and set individual pixels using functions in Processing.

Transcript

Hi, okay, this, this is the video. This is the one that... I don't know. Maybe you've been waiting for. Maybe not. This is the video where I want to talk about pixels. Pixels. The pixels. The pixels themselves. So let's think about this in context for a second. Something that we do a lot in our lives. This is the lives that we're stuck living. Is w... Read More

Key Insights

• 💻 Pixels in computer screens are not inherent to the system and are created using algorithms that fill in the gaps between two points.
• 😫 Functions like get() and set() in Processing allow for convenient retrieval and manipulation of individual pixels' colors.
• 🏪 The Pixel Array in Processing is a data structure that stores the color values of pixels and enables more efficient manipulation of pixels.

Questions & Answers

Q: Why do we use functions like get() and set() in Processing to manipulate pixels?

Functions like get() and set() provide a convenient way to retrieve and set the color of individual pixels without having to manually set each pixel's color using their x and y coordinates.

Q: When might you want to manipulate pixels individually instead of using functions like get() and set()?

You might want to manipulate pixels individually when you need to create shapes or images that cannot be achieved using the pre-existing functions or when you need to perform specific image processing tasks like adjusting brightness or contrast.

Q: What is the Pixel Array in Processing?

The Pixel Array is a data structure that stores the color values of all the pixels on the screen or in an image. It allows for more efficient manipulation of pixels by accessing them using their x and y coordinates.

Q: How can the Pixel Array be used to set the color of an individual pixel?

By accessing the Pixel Array using the formula x + y * width, individual pixels can be set to a specific color by assigning the desired color value to the corresponding index in the array.

Summary & Key Takeaways

• The video discusses the concept of drawing lines on a computer screen and how the existence of those lines is created using algorithms that fill in the pixels between two points.

• It explores the use of functions in Processing, such as get() and set(), to retrieve and set the color of individual pixels on the screen.

• The video explains the use of the Pixel Array in Processing to efficiently manipulate pixels by accessing them using their x and y coordinates.