Required Data Science & Analytics,Data Mining & Management freelancer for Data scientist required for face processing algorithm job

We would like to detect individuals' heart rate by measuring the subtle color changes on their faces.

The task is to develop a forehead detection and tracking computer vision algorithm (i.e., face processing algorithm) which will be used in an Android & iOS mobile application with the following specifications:
(1) Minimal storage size
(2) Minimal CPU load
(4) Minimal forehead movement can be assumed as individuals will be fixating the screen (this should help minimize detection rate and therefore CPU load)

Please kindly apply to the job by specifying:
(1) How much development time and effort this task would require
(2) What CPU load you anticipate / can get to?

Skills & Expertise Required

Data Science & Analytics Data Mining & Management