yan0409 / gcam2ply

Create 3D point clouds from depth images captured with the lens blur feature of the Google Camera app for Android.

gcam2ply

Creates a 3D point cloud (PLY) from a depth image captured with the lens blur feature of the Google Camera app for Android.

Usage

Make sure you have exiftool and scipy installed and call:

./gcam2ply.sh image.jpg model.ply $w $h $f

w, h, and f are the sensor with, sensor height and focal length of your phone's camera in mm, respectively. For the Nexus 5, the values are w: 4.54, h: 3.42, f: 4.0 .

Information on the Google Camera depth data is available here.

Limitations

• Simple camera model: No skew, principal point at (0,0).
• Assuming 8-bit PNG depth maps.

Tips

• You can get much higher resolution models by changing the lens blur quality to high in the Google Camera app.
• For best quality, turn down the blur to minimum before saving the image. Otherwise, the color information in the point cloud will be blurred as well.
• Meshlab is a nice tool for viewing PLY point clouds.

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