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kandi X-RAY | faceTracking Summary
kandi X-RAY | faceTracking Summary
this is my blog pages
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Top functions reviewed by kandi - BETA
- Run detection
- Detect all faces and trackers
- Detect faces of the given frame
- Return the boxes for the given frame
- Return the number of seconds since last event
- Update all tracks
- Draws a list of boxes
- Returns True if the event was triggered
- Update the face
- Resets the simulation
faceTracking Key Features
faceTracking Examples and Code Snippets
Community Discussions
Trending Discussions on faceTracking
QUESTION
Using ARKit for facetracking, I get faceAnchor (ARFaceAnchor) as soon as the face is detected, which provides a simd_float4x4 matrix. I know about transformation matrices, and am also aware that the topic has been partially addressed (here: How to get values from simd_float4 in objective-c , and here: simd_float4x4 Columns), but is there a straighforward way to get yaw/pitch/rool values from the face anchor? (in order to feed my y/p/r values in the code below).
...ANSWER
Answered 2021-Apr-28 at 09:41As there is apparently not (yet) a function provided by Apple for that purpose, it is a priori required to implement quaternion to euler angles computation. With these mathematical resources, and a radian-to-degrees conversion function, this can be implemented as an extension, as follows:
QUESTION
I am building an app that captures facetracking data from the iPhone TrueDepth camera.
I need to write this data to files so I can use it as the basis for another app.
Within the app, the data is saved into four separate arrays, one containing ARFaceGeometry objects, and the other three with transform coordinates as simd_float4x4 matrices.
I am converting the arrays into Data objects using archivedData(withRootObject: requiringSecureCoding:)
then calling write(to:)
on them to create the files.
The file containing the ARFaceGeometry data is written and read back in correctly. But the three simd_float4x4 arrays aren't being written, even though the code for doing so is identical. Along with my print logs, the error being given is 'unrecognized selector sent to instance'.
Properties:
...ANSWER
Answered 2020-Aug-31 at 02:25As already mentioned in comments structures can't conform to NSCoding but you can make simd_float4x4 conform to Codable and persist its data:
QUESTION
I'm using a script in Spark AR Studio to try to show and hide a lightbulb on top of a person's head. The bulb hides with bulb.hidden
I have tried bulb.visible
unsuccessfully. Any Ideas? Code below:
ANSWER
Answered 2020-Aug-21 at 21:17bulb.hidden = true //this will show the bulb
bulb.hidden = false //this will hide the bulb
bulb.visible //this is not a valid property
QUESTION
I'm having trouble getting the FaceTracker Class to work on HoloLens 2.
As soon as I try to detect the faces with ProcessNextFrameAsync Method
I get an exception of the following kind:
System.Runtime.InteropServices.COMException (0x80004005): Unspecified error
This is only the first part of the error message, if more information is needed, I can add that.
See this for a minimal example.
...ANSWER
Answered 2020-Jul-14 at 03:29This is an official sample show how to use the FaceTracker class to find human faces within a video stream: Basic face tracking sample. And in line 256, that is the main point to get a preview frame from the capture device.
However, base on your code, you have created a VideoFrame
object and specified the properties and format to it, but you are missing invoke GetPreviewFrameAsync
to convert the native webcam frame into the VideoFrame
object.
You can try the following code to fix it:
QUESTION
I've been trying to make the face texture in a 2D canvas/plane move only along the X/Y axis, following the movements of the face without rotating, with the 2D background camera texture reflected accurately on top. Right now, when I connect the canvas to the face tracker I'm getting distorted scale, and the 2D plane rotates in 3D space. See below for the current canvas/camera texture/face tracker set-up. Manual scaling results in poor tracking.
Here is my code:
...ANSWER
Answered 2020-Jul-07 at 22:17Turns out Facebook has an example that deals with 2D movement but not scale: https://sparkar.facebook.com/ar-studio/learn/reference/classes/facetrackingmodule
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install faceTracking
You can use faceTracking like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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