From Stanford University to the Google engineering team. We already know almost everything about how cameras work on Google Pixel, today we have the opportunity to complement this information with the information given by Marc Levoy, Google Photo Team Leader.
Night vision mode allows brighter and is able to be in Android The only one capable of improving results even in daytime situations. Google’s night mode is an example of how computer photography can evolve and marks a before and an after in mobile photography.
Night Vision: One new stage for photography
The main Achilles heel of any camera is night photography. In phones we have even smaller sensors, which have a hard life to capture the light in complicated scenes. Noise often occurs with consequent loss of detail when taking pictures in very low light conditions, as phone processing tends to try to gather as much information as possible, even if the ISO needs to be raised and the shutter time, resulting in sharper, less sharp images.
Levoy tells us that smartphones start to struggle when the brightness of the scene drops to
lux, although phones with good HDR are able to have results acceptable up to 3 lux. Google Pixel with night vision can deliver results in 0.3 lux conditions, with no tripod or flash required. For this, it is important to understand how they capture scene information.
Google Pixel does not use Zero Shutter Delay to avoid shutter speed limitations, which in this case is much slower. This way they can combine multiple long exposure photographs, and through their noise reduction and processing algorithms Overall of the image, we get the equivalent of a photograph exposed for three seconds. The goal of Night Vision is to be able to have photos of dark areas that we cannot see even with our own eyes.
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Another major problem of Mobile photography is the white balance. Normally, there are no problems during the day, but at night the devices tend to compensate for photography by setting the white balance according to what the “sensor” sees. N At night photography, it is normal that if there is any orange light, the whole picture turns orange. The Google team worked on an automatic white balance algorithm that tends to neutral and eliminates any color that enters the image.
This mode also works during the day, have even brighter images with low noise, so it becomes one of the most versatile mobile phones nowadays when it comes to taking great pictures.