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yzslab / gaussian-splatting-lightning

A 3D Gaussian Splatting framework with various derived algorithms and an interactive web viewer
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What is depth unit? #33

Closed tamuatamu closed 3 months ago

tamuatamu commented 3 months ago

Sure, I can help with that. Here's a revised version of your text:

I want to ask about the depth unit we can get from a depth image.

I checked the inside of the depth image like below. I want to know the depth value for each pixel. But the image has 3 channels, and I'm not sure about the unit of measurement (meters or something else). Could you please help me understand this? Thank you.

def get_outputs(self, camera, scaling_modifier: float = 1.): image = self.renderer( camera, self.gaussian_model, self.background_color, scaling_modifier=scaling_modifier, render_types=[self.render_type], )[self.output_key] image = self.output_processor(image) print(image) print(image.shape) if image.shape[0] == 1: image = image.repeat(3, 1, 1) return image

yzslab commented 3 months ago

Hi, there is no unit for depth. It is the value of the z axis in camera space. Please note that the image return by self.output_processor() is not depth value anymore. It is the colormap of the depth value.