The Scientific Image Analysis (SIA) software is an image processing application written in MATLAB for scientific analysis of images and video. SIA is designed to be intuitive and easy to use, and is free to download. While SIA is designed to meet the image processing needs of biologists, its functionalities can be used for a wide variety of applications. With SIA, users can calibrate and make single and continuous measurements of length, angle, area and the average color values within a region...