Summary

In this chapter, we have completed two of the three voices composing the menu of our COVID-19 Detection Tool web application.

To deal with the Image Enhancement voice, we leveraged the Pillow library, which is a very powerful library that makes it possible to manage some quite powerful functions, such as image contrast and brightness, with very few lines of code.

We also created multiple selections for the user, adopting radio buttons and if clauses. Radio buttons are a very clean and powerful way to propose selections, and there is no way to put any kind of ambiguity in the process.

Using sliders in combination with image visualization is a powerful tool to adjust various parameters, such as contrast and brightness. Sliders provide the user with the ability to precisely and continuously select the desired value for any given parameter.

Another important trick to underline is that every time we modified images (for example, to perform brightness adjustments), we...