如何在iPhone中检测眼睛瞳孔和测量瞳孔之间的距离 [英] How to detect eye pupils and measure distance between pupils in iPhone

问题描述

我研究过很多关于人脸检测的例子，而且我已经使用 CIDetector 和 HaarCascade_eye.xml 。但我想检测眼睛的瞳孔并想测量瞳孔之间的距离。请指导我，以便我能做到。

I have studied a lot of example about face detection and also I have detected the eye in iPhone using CIDetector and HaarCascade_eye.xml. But I want to detect the pupils of eye and want to measure the distance between pupils. Please guide me something so that I could do that.

推荐答案

使用以下公式计算两点之间的距离：

To calculate distance between two points using the following formula:

这将获得两只眼睛的中心点（由CIDetector检测并比较它们的位置以输出您正在寻找的测量值。

This will get center points of the two eyes (as detected by CIDetector) and compare their locations to output the measurements you're looking for.

if(faceFeature.hasLeftEyePosition && faceFeature.hasRightEyePosition)
{
    CGPoint leftEyeCenter = faceFeature.leftEyePosition;
    CGPoint rightEyeCenter = faceFeature.rightEyePosition;

    float simpleDistance = rightEyeCenter.x - leftEyeCenter.x;
    //This finds the distance simply by comparing the x coordinates of the two pupils

    float complexDistance = fabsf(sqrtf(powf(leftEyeCenter.y - rightEyeCenter.y, 2) + powf(rightEyeCenter.x - leftEyeCenter.x, 2)));
    //This will return the diagonal distance between the two pupils allowing for greater distance if the pupils are not perfectly level.       
}

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