I'm a VFX artist, programmer, student, and Blender lover. Recently, I decided to combine all four with an addo-n I developed to improve the process of merging images/renders.
We merge images all the time, whether it's a background image with a car or character render, or a visual effect video. As I've created visual effects and seen other's composites, I've noticed a trend. Other than lighting and shadows, there's one common culprit that often breaks the merge: color. Every image has it's own color range; one image's "white" color isn't necessarily the same as another. Our eyes notice those discrepancies, and can quickly discern pictures as a composite.
I applied this principle in the Blender compositor, but I noticed the workflow—picking the white and black values, doing the calculations—was tedious and uncertain. It's hard to know whether you got the "right" white and black values to make the merge work. So I took it upon myself to make the process easier in Blender, and the Color Matching Analyzer add-on was born.
Learn more about what it can do on the Blender Market. Despite my lack of time in school, I put a quick video together to help you get a taste of the workflow. I've loved being able to use this addon, and I know it'll help you with your workflow as well.