Exactly what does seamless mean? When you watch a dance it has to flow, otherwise it is uncomfortable to watch. In photography, the word “flow” is replaced with seamless. So what does that mean? Let me explain first with a photograph from my personal portfolio:
This is The Monticello Hotel, located in Longview WA. Aside from the strong saturation (I was reconstructing a postcard from the 1920s that showed this building), it looks more natural than the original photograph. There are several layers used to fix this particular photograph, but would you know that if I showed you the original? That’s the power of seamless. The layers have to fit together. Think back to when you were in grade school, and the teacher told you to stay in the lines when coloring; it’s the same thing.
So how does this fit with colorizing exactly? It makes sense with professional photography, not so much with colorization….oh but it does! Take a look at this photo I set up as an example:
Granted, the example is extreme, but it’s to make a point. One circle is showing the pink bleed into the green, indicating that the green wasn’t colored in all the way. I’ll confess, so often when I’m filling in the skin color for my subjects, that’s when I find missed areas with clothing or background. The other circle is showing a missed patch of pink that should have been removed. Another confession – when I’m filling in hair is when I fall into that trap.
Hope this helps!