Chương 347: Digital Image Processing

Mary ignored the cautiousness that Vanessa had invoked as she took a snippet of the paused video. 

Pasting the image into the software, Mary started to type some code, with the first phrase converting the image to grayscale.

By turning the image into grayscale, Mary essentially erased all traces of the other colors that would have hindered her findings. At the same time, she wrote a code that manually does a histogram on the grayscale image.

The histogram was a graph that showed the frequency of numerical data using rectangles. The height of a rectangle (the vertical axis) represented the distribution frequency of a variable (the amount, or how often that variable appeared).

The goal of doing a histogram was to illustrate the major features of the distribution of the data in a convenient form.

While Mary was focused on digital image processing, Vanessa's solemn expressions were gradually broken down when she saw all that technical stuff.