Instead of modifying just particular pixels, now we have learned to modify all of the pixels in an image by changing the values of the colors associated with each pixel.
I decided to take a rather bright water color painting I made of my grandma and tone it down to a nice cool color. I did this by taking the average of all three color values (red, green, and blue) and set the original "blue" value to this new average. After that, I divided the value of red by a factor of 1.2 and multiplied the green values by a factor of 0.8.
Here is the before and after:
And to show this modification with another picture, here is a passion flower example:
See you in class!