The deal, which must be signed by this Sunday, includes almost 500 extra electronic gaming machines, an extension to its exclusive Auckland licence and more easily transferable ways of handling cash in the casino.
Mr Brown said the original deal between the Government and SkyCity showed "there was more work to be done" in dealing with "the harm from providing more pokie machines as part of that deal".
"I'm supportive of the deal to the extent it is providing us with a convention centre. I certainly feel ... we're dealing as best we could with the consequences of the decision.
"Facial recognition technology is in my view part of a much better package of harm minimisation measures that would genuinely minimise harm to the family by ... genuine problem gamblers."
Mr Brown said SkyCity was a "good, responsive corporate citizen" for the way it received his facial recognition proposal.
He said the SkyCity use of the technology would effectively work as a trial for pokie machines across Auckland, which the council was responsible for regulating. Problem Gambling Foundation chief executive Graeme Ramsey said he wanted more from SkyCity although facial recognition could be a "useful tool".
Economic Development Minister Steven Joyce said he was "pleased to endorse the approach that Len and SkyCity have discussed".
How it works
1. SkyCity scans in a photograph of a banned problem gambler, either self-barred or excluded by the casino company.
2. All people in the casino are subject to scanning, picking up identifying facial features and movements.
3. The scanner references those in the scanner against the same distinctive features on photographs of banned gamblers.
4. Any match of the banned gambler with someone inside the casino alerts security to a possible barred person.
