Images as arrays

JuliaImages are two-dimensional arrays, and every pixel can be either scalar or a one-dimensional array:

• Grayscale images represent pixels as scalar values and they are called Gray
• RGB is a three-dimensional array which represents each point in three different colors, such as red, green, and blue
• PNG images with a transparent background are called RGBA

Accessing pixels

When you use a load command in Julia, it reads the image and encodes it in RGB. In the following example, we will see how Julia manages information for a single pixel:

using Images
img = load("sample-images/cats-3061372_640.jpg")
img[1:1, 1:1, :]

After Julia executes the preceding set of commands, you should expect to see the following...