Reflection on Unit 2

In Unit 2, we learned all about images; what is needed to render them, RGB values and bits per pixel, and different file types that open images. In the unit I enjoyed using the tools on code.org to create my own images, because it allowed me to learn the code in an interactive way but also exercise my creativity. In the unit I did not enjoy hexadecimal, at first. However once I understood how it worked I grew to really admire it's practicality. One new thing I learned was compression, and how it worked; I had no idea that it used algorithms and a dictionary to compress image data. Another new thing I learned was steganography, which I read in the Blown to Bits chapter reading. Steganography is sending secret messages in imperceptible ways, so for example, manipulating color values on an image so that they represent sequences of 0s and 1s that translate to ASCII letters. This was very interesting to me since it opened up a whole new function of images, in using them to communicate in a way that isn't necessarily obvious. Though we covered a lot of information in this unit I would like to know more about sampling, and how a camera converts the physical world to the digital world, and what changes are involved. I feel like that would be an interesting topic to pursue because it directly impacts me, as I have multiple cameras and take many pictures.