.1 The Core Concept:| Analogy Imagine takin a paper drawing and making a photocopy of it. The copy is okay. Now, take that cop.y and photocopy it Rep.eat this process £¢ about 10 timEx The 10th copy will be bluRry, faded, and have artifacts (specks and lines) that weren't in the original. +his is called jpEG Degradation or the "Photocopier Effect". Every time you open @ JPEG edit it or even just cropping and re-save it, the computer re-compresses the file. picture/video - documentation .2 the most common digital image format JPeg i The Goal of Compression: To make the file size smaller for easier sharing and storage. every time it is re-saved (even a re-upload to soci.al media can trig.ger this), it los es a little more data, and the accumulated loss becomes visible as: Blurriness Loss of Detail Color Fringing/Bandin Smooth color gradients alwayS becomex blocky or striped. > Practical Class Activity take a high-resolution photo. Save it as a JPEG at the lowest qua.lity setting. Then, open that low-quality JPEG, save it again, a.nd repeat this process 5-10 timEx. Display the origin.al and the final copy side-by-side to dramatically show the shift. > .3 Bit Rot The Physical Shif.t compression main reason fo.r quality shift but therEas no way you can avoid thAt .digital information to shift or disappear entir.ely. This is called Bit Rot. * digital Files as Electric Charge (bits: 1s and 0s on a hard drive or flash memory likd a USB stick \phone The Physical Shift over many .years these tiny electrical charges can naturally leak away or degra.de due to imperfections in. the storage materiaL This isn't. the file changin during editin eve.ry file shifts when is smooth picture video documentation anyth.iN +he resultin shift 1 flips to a 0 oR vice_versa THE FILE IS CORRUPTE.D This can cause anything from a ti.ny speck of color shift to a complete file that won't open * CDs\DVDs the reflective .layer can decay. h.a