Tech
Storyboard Text
- Hello everyone, welcome back to technology camp where we learn the ins and outs of devices! Today we are going to look at images on a computer and how they are encoded.
- Can anyone tell me what digital images are made of?
- Me! Images are made out of 1000s of pixels.
- That is correct! Images are made up of pixels, and each pixel is made up of a set of binary number. 1s and 0s. The colours in pixels are formulated by the RGB colour system.
- The RGB colour system composes all colours from just red, blue, and green. In this case, the RGB system is used to make the colours in pixels.
- What is the RGB colour system?
- Oh, I get it! But how does the computer know where the colours go?
- What a great question! Images are most commonly represented as a bitmap. What I am projecting now is a bitmap.
- The bitmap displays binary numbers and the computer then translates them into coloured pixels, like this!
- Wow! That is so cool!
- Alright the next important thing to know about is metadata! This is the resolution and colour depth of the image.
- I know what resolution is. Resolution is the height and width of an image. Fun fact, the more pixels in an image, the higher the resolution!
- Well Suzie, would you like to share it with us?
- Yeah of course. Colour depth is the number of bits that represent each pixel.
- That is such an interesting fact! Well I know what colour depth is.
- Does anyone have anymore questions?
- That is right! Suzie also mentioned bits. Bits are the state of a single wire being on or off.
- No, you covered it all!
- Okay everyone, your lesson on how images are encoded are over!
- Thank you!
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