iphone - 如何使用 CIFeatures 将图像放在眼睛和嘴巴上
<p><p>我找到了 <a href="http://www.icapps.be/face-detection-with-core-image-on-live-video/" rel="noreferrer noopener nofollow">link</a>将图像放在面部点上。就像我需要检测眼睛并在那里放置图像一样？</p>
<p>为了简单起见，我需要在人眼上放置一个图像。我该怎么做？任何提示将不胜感激!</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><pre><code>for ( CIFaceFeature *ff in features ) {
// find the correct position for the square layer within the previewLayer
// the feature box originates in the bottom left of the video frame.
// (Bottom right if mirroring is turned on)
CGRect faceRect = ;
// flip preview width and height
CGFloat temp = faceRect.size.width;
faceRect.size.width = faceRect.size.height;
faceRect.size.height = temp;
temp = faceRect.origin.x;
faceRect.origin.x = faceRect.origin.y;
faceRect.origin.y = temp;
// scale coordinates so they fit in the preview box, which may be scaled
CGFloat widthScaleBy = previewBox.size.width / clap.size.height;
CGFloat heightScaleBy = previewBox.size.height / clap.size.width;
faceRect.size.width *= widthScaleBy;
faceRect.size.height *= heightScaleBy;
faceRect.origin.x *= widthScaleBy;
faceRect.origin.y *= heightScaleBy;
if ( isMirrored )
faceRect = CGRectOffset(faceRect, previewBox.origin.x + previewBox.size.width - faceRect.size.width - (faceRect.origin.x * 2), previewBox.origin.y);
else
faceRect = CGRectOffset(faceRect, previewBox.origin.x, previewBox.origin.y);
</code></pre>
<p>你可以得到正确的脸，但你需要细化图像的眼睛</p>
<p>这将帮助你获得每个位置</p>
<pre><code>-(void)markFaces:(CIImage *)image
{
// draw a CI image with the previously loaded face detection picture
@autoreleasepool {
CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace
context:nil options:];
// create an array containing all the detected faces from the detector
NSArray* features = ;
NSLog(@"The Address Of CIImage In: %p %s",image,__FUNCTION__);
NSLog(@"Array Count %d",);
NSUserDefaults *prefs = ;
if(==0)
{
//No image is present
}
else
{
for(CIFaceFeature* faceFeature in features)
{
if(faceFeature.hasMouthPosition)
{
// Your code based on the mouth position
}
if (faceFeature.hasLeftEyePosition) {
// Write your code Note: points are mirrored point so u need to take care of that
}
if (faceFeature.hasRightEyePosition) {
// Write your code Note: points are mirrored point so u need to take care of that
}
}
}
}
</code></pre></p>
<p style="font-size: 20px;">关于iphone - 如何使用 CIFeatures 将图像放在眼睛和嘴巴上，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/15757372/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/15757372/
</a>
</p>
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