Converting pointcloud2 data to opencv image

I am trying to convert data obtained from a 2D laser scanner into an openCV image. On searching online for this, I found that first I had to convert the laserscan data to pointcloud2, then the pointcloud2 to a ROS image and then the ROS image to an opencv image. Currently, I do not have access to a lidar, so I had created a node that publishes fake pointcloud2 data. However, I did not understand what organised pointcloud means. I arbitrarily set the height and width parameters to 100 each, and also assigned arbitrary RGB values to points, and I got a 100x100 image, but I do not understand how that image is a representation of my pointcloud data. Can someone please explain it?