The problem with that approach is that the microdot pattern has to be fixed. SFM type approaches work by doing feature matching between images to determine the correspondence between images. If the microdot pattern changes for each image, the correlation fails.
AIUI, the kinect and similar tools don't do SFM, but rather measure depth by looking at how the micro-dot pattern is distorted.
AIUI, the kinect and similar tools don't do SFM, but rather measure depth by looking at how the micro-dot pattern is distorted.