G'day Tony, and welcome to the madness and addiction from South Dakota, USA.
If I am interpreting your question correctly, you are gluing a photo to your wood to cut a portrait or other cutting? Why?
I believe most of us glue patterns to the plywood, but I have not known of anyone that glue photographs. There are several folks here that will take a photo you upload, or send to them, and produce a pattern which is printed off on paper and then applied to the wood, plywood or whatever you are using. This way you do not damage a photograph, and have a nice clear set of lines to cut with. Yeah, I know, the ole eyes aren't what they used to be.
If I am not making sense here, or I managed to misunderstand your query, let us know, I am sure someone here will have better information that I have provided.
Again, Welcome Aboard, and let us see some of your work.
Al