Samsung ISOCELL GN2 image sensor. Free Technical Library News

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Samsung ISOCELL GN2 image sensor

01.03.2021

Samsung Electronics has unveiled a new flagship image sensor for smartphones. The 50-megapixel ISOCELL GN2 is the successor to last year's ISOCELL GN1. Although the resolution of the novelty has been preserved, it brings a number of improvements in other parameters, including larger pixels and faster autofocus.

The 1/1,12-inch sensor has a pixel size of 1,4 micrometers. As the manufacturer promises, the new sensor provides high-quality photos up to 100 megapixels, improved Dual Pixel Pro autofocus, HDR and Smart ISO Pro, depending on lighting conditions.

In poor light conditions, the sensor can use 4 pixels as a single 2,8 micrometer. In 100MP mode, the sensor re-arranges the pixels to create three separate 50MP layers in green, red and blue. These frames are then scaled and combined to produce a single 100MP photo.

Dual Pixel Pro technology provides Samsung's "most advanced" phase detection autofocus system ever. Two photodiodes are used next to each other in each pixel, providing fast focusing. Unlike Dual Pixel, the solution also offers omnidirectional focusing by dividing pixels not only vertically but also diagonally.

The improved HDR mode not only allows you to take pictures in difficult lighting conditions, but also reduces power consumption by 24% compared to HDR in ISOCELL GN1.

ISOCELL GN2 supports Full HD+ video recording at 480 fps and 4K video at 120 fps. Samsung has already begun mass production of the sensor.

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Heatwaves became more frequent and lengthened 08.07.2020

Scientists at Australia's Center of Excellence for Climate Extreme Research said that since the 1950s, global heatwaves have increased in both length and frequency across almost the entire planet.

The first comprehensive global assessment of heat waves showed that since 1950 they have become more frequent and longer across the planet. The results of the study made it possible to obtain a new metric indicator of the total amount of heat. He showed how much heat is contained in individual heat waves and seasons. As the researchers expected, this number is growing.

For example, during the hottest season in Australia, the temperature increased by a total of 80°C. In the Mediterranean, the most extreme seasons were up to 200°C hotter than the "normal" seasons.

“Over the past 70 years, we can see more and more heatwaves around the world. But now this trend has accelerated noticeably. If we add up the temperature, we can see that the heat around the world has increased by 1°C-4,5°C degrees. In some countries, it has increased by 10 ° C "- lead author of the study Sarah Perkins Kirkpatrick.

The only heat wave metric that does not show acceleration is heat wave intensity. However, this is due to the fact that there are more hot days around the world, and heat waves have become longer. When measuring the average temperature in longer thermal waves, any changes in intensity are almost imperceptible.

For example, in the Mediterranean there was a sharp surge in heat waves. In the period 1950-2017, there was an increase in heat waves by two days per season. However, between 1980 and 2017, this increased to 6,4 days per season.

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