22102128: Face detection accuracy is bad

[openradar-mirror]

Description

Summary:
CIDetector’s face detection is not accurate. In a picture containing 7 faces — 4 of which are quite vertical and facing front — it detects 0. It needs much improvement.

Steps to Reproduce:
Run sample app and read the console logs. It has nothing because none faces are detected.

Expected Results:
At least it should detect the 4th and 7th faces.

Actual Results:
It detects none.

Sample Code:
http://cl.ly/2N2i2x3E3127

Product Version: 9.0 beta 4
Created: 2015-08-01 01:59:40.453240
Originated: 2015-07-31T20:59:00
Open Radar Link: http://www.openradar.me/22102128