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The 'Pulse Estimation' feature, and similar functions that developers have created, work by measuring changes in the color of the skin, since the blood flows under the skin. There is not a pre-made estimation function in SDK 2.0 to the best of my knowledge. You may be able to integrate a pre-made pulse calculation module into an SDK 2.0 application though, since the SDK supports integration with a range of programming languages and software platforms.
For example, here is a webcam pulse detector module in the Python language, which SDK 2.0 supports.
OpenCV pulse detectors tend to use analysis based on face detection via video frames.
You can research this subject further by googling for 'calculate pulse skin color'.
The 400 Series cameras have significant technical advantages over an ordinary webcam. For example, if your project involves depth data, the 400 Series has a depth sensing range of 10 m thanks to its D4 Vision Processor component. The cameras can also run up to 90 frames per second in depth mode. Furthermore, the D4 Vision Processor enables an error rate of less than 1%.