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marek-simonik / record3d

Accompanying library for the Record3D iOS app (https://record3d.app/). Allows you to receive RGBD stream from iOS devices with TrueDepth camera(s).
https://record3d.app/
GNU Lesser General Public License v2.1
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Why does the point cloud reconstruction of the depth map sequence I export have bad effect? #53

Closed wahiahia closed 1 year ago

wahiahia commented 1 year ago

Is it because I need other ways to obtain depth map？

marek-simonik commented 1 year ago

I'm not sure if I understood your question. What do you mean by bad effect and what do you wish to do?

wahiahia commented 1 year ago

I want to use depth frames for research related to 3D reconstruction. When I exported data directly to Mac through the Record3d app, I get .Exr files, but I want to use PNG format files, I convert EXR to PNG directly through Mac conversion, and I find that the data I get is lost. So is it possible to get a depth frame that can only be transmitted through the USB in this project?

marek-simonik commented 1 year ago

So is it possible to get a depth frame that can only be transmitted through the USB in this project?

Do you mean if it is possible to have Record3D export raw, uncompressed float32 bytes as depth data? That is not possible.

However, the EXR files contain float32 depth values (in meters) in the Red channel. I assume Mac conversion is unable to read/convert 32-bit float32 values into 8-bit uint8 PNG files, so you will have to convert the depth data in a different way, i.e. reading the float32 values from EXR yourself and performing the conversion into PNG yourself too.