Introducing the RealSense D405 close-range stereo depth camera
Hi everyone,
Intel have introduced a new RealSense 400 Series stereo depth camera model, the RealSense D405. It is designed for very close range scanning, with an ideal depth sensing range between 7 cm and 50 cm. It is available now from the official online RealSense Store.
https://store.intelrealsense.com/buy-intel-realsense-depth-camera-d405.html
A new March 2022 edition of the data sheet document for the 400 Series cameras that includes the D405 is also now available. Please visit the link below and click on the PDF format link to download the new edition as a PDF file.
https://dev.intelrealsense.com/docs/intel-realsense-d400-series-product-family-datasheet
-
Hi Scott The D405 does not have a built-in projector.
In regard to the effect that an external projector might have on the D405's image, I do not have such a projector to test with. Instead, I enabled the depth stream of the D405 and pointed a D455 camera model at the same area whilst it was streaming infrared at the maximum laser power seting to see whether its projector emissions would affect the D405 depth image. Doing so did not affect the D405's depth image at all. Pointing the D455 directly at the D405 also had no effect on the image.
The imaging sensor component that the D405 uses is equipped with an IR Cut filter, which makes infrared frequencies invisible to the sensor.
-
Is it possible to get a writeup on how to get high-accuracy data from the 405? Particularly at the closer end of its distance range (e.g. 7cm-15cm).
I am currently using a 435i and am not seeing much improvement with the 405 when I swap between the sensors (using the latest viewer app - 2.5.0).
Additionally the 405 sensor is not seeing planar surfaces such as walls (it is just dropping that data) and appears to be seeing outside of it's range. Perhaps this is an exposure or calibration issue?
My guess is that the default settings options (tried accuracy, density, etc) are not the correct way to use this sensor for optimal performance. Any help in optimizing capture from this sensor would be greatly appreciated!
-
I tested with the D405 but was not able to recreate your issue with seeing walls when testing with the RealSense Viewer at 15 cm range from the wall, even in dim lighting conditions. The camera used to produce the image below has not undergone calibration.
The D405's ideal range is 7 cm to 50 cm, not 15 cm. This is likely why you are receiving depth data beyond 15 cm.
I also tested the D405 with a wall at 50 cm in dim light conditions. The depth detail did reduce significantly at that outer range, though was much better when observing an illuminated surface such as a computer screen at that distance.
One of the differences between the D435i and D405 models is that the D405 is not equipped with a built-in laser projector. A built-in projector is useful for analyzing surfaces with low texture or no texture (walls, desks, doors, etc) as it casts a semi-random pattern of dots onto surfaces that the camera can use as a 'texture source' to read depth from. In the absence of the dot pattern, a 400 Series camera can instead use ambient light in a scene to analyze surfaces for depth detail if the scene is well lit.
At maximum range, I found that enabling the Hole-Filling post-processing filter can help to fill in detail when observing a plain wall with D405.
-
If there is a confidential aspect of your project that you cannot discuss on a public forum then please email me at the address below.
-
Hi, I am Jun Kai, I would like to ask some questions about the D405:
1. How good is detection in low light scenarios/under LED flashlight?
2. Is the RGB camera able to show a video feed of distances above 0.5m? If yes, then what would the max distance be?- (in the datasheet, it is written that "Range 7 cm to 1 m (varies with lighting conditions)")
I would be using it for Visual Inertial Odometry purposes and providing video feed in a no-light, constrained, enclosed space (ie. in rubble). Out of all RealSense products, only this sensor is small enough for my project (<6cm). Would really appreciate your advice on whether D405 is the most suitable for our purposes.
Thank you in advance! -
Hi Lojunkai98 As the D405 does not have a built-in projector, it cannot see in the dark without a light source present in the scene. The images below are taken in a room with no light, and when observing an illuminated laptop screen in that dark room.
The next image shows the room in low-light conditions with a single light switched on at the other side of the room.
In regard to sensing beyond 0.5 m, that range value applies to depth sensing. Like a video webcam, the RGB sensor can see much further.
The depth image will begin to break up as the camera is moved below its minimum distance, as shown by the image below where the camera is at 5 cm distance from a laptop.
You can compensate for some of that detail loss by applying a Hole-Filling Filter post-processing filter.
Please sign in to leave a comment.
Comments
10 comments