AP Comp Sci Unit One
Your computer science teacher asks you to sample a black and white image that is 4" x 6". How would you sample the image to provide a good digital approximation using the pixelation widget? What sample size would you use? How would your decision affect the digital representation?
15x15 which would be 225 squares. a larger sample square allows for it to be seen clearly.
How would you explain a number system to someone who had never seen numbers before?
A number system like binary I would explain like 0 corresponds with a certain number, and you use multiple 0's to create a certain number up to something like 256 or 512
Recall when you built your information sending device. Why did we decide to send a message as a sequence of two options rather than modifying our devices to represent more options?
Because giving it more options makes it more complicated. And therefore it does not work as well.
Imagine you were using some of our pixelation tools to create an image and you posted it online for your friends to see - but, a week later you find out someone took that image and put it on a T-shirt that they're selling for $10 each.
Now that we understand Copyright, what would need to change in order for the scenario from the warm-up to be okay? You would have to liscence it like basically protect your work if you don't others are free to use it
How is a Creative Commons license different from a regular copyright?
It allows your work to be shared, reused, and remixed to help spark more creativity.
Modern car odometers can record up to a million miles driven. What happens to the odometer reading when a car drives beyond its maximum reading?
It goes to 0
"The binary pattern 01000001 represents the number 65." Write a brief response explaining whether you believe this statement is always true. Explain your reasoning.
It is always right becasue binary means right or wrong and that is correct for the number 65 so it will never be wrong.
You've been given a new cell phone with a 2 gigabyte data plan. You plan to use your phone for text messages, images, video, and music. Which of these categories are best compressed using lossless compression? Which of these categories are best compressed using lossy compression? Why?
Lossy is best for text messages and music because for music it reduces sound quality but most people can not hear the difference. And for text it saves space for repeated phrases and making it shorter. And for lossless compression images and videos because it keeps the quality but reduces the file size.
When using bits to represent fractions of a number, can you create all possible fractions? Why or why not?
No because some numbers are to big and some numbers are to small.
Which statement about analog and digital images is true?
Sampling an analog image more frequently produces a digital image with a better representation.
Describe how the process of sampling, RGB pixels, and binary sequences work together to display a digital color image.
You have to use 1's and 0's in order to create the colors that you want to create. The pixels and color work together to become the image
Need to make a flippy do tommorow
https://www.youtube.com/watch?v=zqeCzv3I1Vk&ab_channel=ChristineLake
