Yes, we measured as an experiment single depth value at the center of an image. The camera was pointed towards a rectangular object. We captured the object at the start around 1m and moved step by step (around 1cm) further.
Since I cannot upload our measured text files here, you can look at them here. There are two text files with and without alpha scaling.
If I take only the unique captured values, then:
- With alpha scaling: 103, 107, 112, 117, 123, 130, 137, 145, 154, 164, 176 cm
- No alpha scaling: 113, 116, 119, 123, 126, 130, 134, 139, 143, 148, 154, 159, 165 cm
The object, environment and lightning was the same.
As you can see, the steps with alpha scaling are larger than without alpha scaling. I mean without, like as I described, the setAlphaScaling is commented out, meaning no alpha is set.
The camera settings is as follows:
- Pro Wide
- 12MP with isp scaling 4x13
- Depth res 800p
- LR check on
- 30 FPS
- Without any filters
Another question please. We are thinking of manual subpixeling. I would like to ask, is there a possibility how to obtain the disparity (98MB) without turning ON the subpixel? I mean, is there a way, how to do the subpixeling manually with some computation later on? I imagine to calculate it just for specific pixels. Because I read here, that the disparity output is supposed to be dumped into memory, then the software interpolation is done.
