Brimbank Crime Investigation Unit detectives are seeking assistance from the public following an aggravated burglary in St Albans on 26 September.
Investigators have been told an offender entered the Ruth Street home about 3.40pm.
The offender confronted the female victim and demanded her mobile phone.
The victim screamed and the offender fled the house.
Police have released images of a man and a computer-based image they believe can assist with their investigation.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or file a confidential report at www.crimestoppersvic.com.au