Bitmaps store for every pixel in an image. Images can have multiple sizes, and various number of colors that are all stored as binary data in a bitmap file. There are multiple ways to represent color using the red, green and blue values of light for each pixel. Often, these values are represented as hexadecimal numbers using different amounts of bits per pixel.
- Documents with words…contain individual characters.…And each of those characters is encoded…into a digital format, and is stored…or transmitted using binary numbers.…The same happens with images.…But instead of characters, it is based on pixels.…When you have an image, it is…broken up into individual pixels.…Each pixel defines the color that needs to be shown…on the screen to render that pixel correctly.…Images that are based on pixels are called bitmaps.…Let's take this image for instance.…
It is divided into multiple rows and columns of pixels.…Each pixel needs to store the value of three colors,…red, green and blue, in that order.…On a screen, each pixel actually has three emitters,…one for each color, red, green and blue.…When you store the values of each color,…you are telling that unique pixel…how bright to make each unique color inside.…This is called RGB, and it is how most screens…work and display graphics.…
Each of these pixels needs to store…these three color values.…One simple way to do that is to store…
This course is the first in our Computer Science Principles series, designed around the AP Computer Science Principles (CSP) curriculum. It is a great foundation for anyone, at any age, to prepare for careers in technology and computer science. Lessons in this segment cover the building blocks of computing: binary logic, number systems, text and image encoding, compression, and simple communication protocols. Understanding these basics will help you understand the interplay between hardware, software, data, networks, and the people that use them.
- Binary and bits
- Digital communication
- Number systems
- Encoding text
- Compressing text and images