One of the unique selling points of the Google Pixel 4 apart from Motion Sense has got to be the cameras. With the Pixel 4 series, Google has stepped up its camera with new features, one being the Astrophotography mode. Google’s AI team has now explained how the feature works behind the scenes.
“Dark current causes CMOS image sensors to record a spurious signal, as if the pixels were exposed to a small amount of light, even when no actual light is present…Due to unavoidable imperfections in the sensor’s silicon substrate, some pixels exhibit higher dark current than their neighbors. In a recorded frame these “warm pixels,” as well as defective “hot pixels,” are visible as tiny bright dots.”, states Google AI team in a blog post.
