Coolest spreadsheet ever
Excel is the MVP of the Office suite, and here is proof - you can implement computer vision algorithms in Excel without any special scripts or macros!
This spreadsheet was created by an Amazon engineer as an intro to Computer Vision for Amazon employees. He wrote everything in Excel, so you can follow along and understand how computer vision algorithms work using only Excel formulas.
Download the workbook here and check out the step-by-step sheets that slowly build up from how to identify lines/edges in a photo to eventually recognizing faces and text. Super cool!