image 2 is (now) malformed (run together as a single identifier).
I assumed you had just one.
If you are doing multiples, the wild card needs to be tamed and the commas put back as you append to existing.
ideas only, not even close to being tested:
(.+?),{,2} <<<Second group capture. Note having the comma will not grab the last . you need to match the End of the string
,\2 <<<might be \1 because of the count