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The lineup of the first three devices was unveiled at Samsung's Galaxy Unpacked event on 14 January 2021. The three devices served as the successors of the 2020 models. All devices' design scheme has changed drastically, redesigning the massive rear-camera module for a slimmer camera module incorporated with the buttons and a uniform appearance for the S21, S21+, and S21 Ultra.
The measure of the fingerprint image quality is in dots per inch (DPI). [8] Optical scanners take a visual image of the fingerprint using a digital camera. Capacitive or CMOS scanners use capacitors and thus electric current to form an image of the fingerprint. This type of scanner tends to excel in terms of precision.
The S Pen has latency at 2.8ms, reduced from 26ms on Note 20 and 9ms on the Note 20 Ultra and S21 Ultra (although the S21 Ultra had S Pen functionality, it was not included with the phone), and marked the introduction of an 'AI-based co-ordination prediction system'. The S Pen also supports Air gestures and the Air Action system.
The Galaxy S22 Ultra had a huge design change which gave it a more similar look to the Galaxy Note20 Ultra rather than the Galaxy S21 Ultra. The S22 Ultra saw the introduction of the built in S Pen which was not present on the Galaxy S21 Ultra. The S22 Ultra also changed the adaptiveness of the refresh rate from 10–120 Hz to 1–120 Hz.
There is a rear-mounted fingerprint scanner on the polycarbonate plastic back. [3] The camera system of the phone is similar to Samsung Galaxy M30s. It comprises 3 rear cameras: 48 MP, 1/2.0" main sensor with f/2.0 aperture, 0.8 μm pixel size, 80° field of view; 8 MP, 1/4.0" ultra-wide lens with f/2.2 aperture, 1.12 μm pixel size,123° field ...
11: The Galaxy Z Flip's ultra-wide camera utilizes the 16 Mp sensor, but images are cropped down to 12 Mp. 12: The Galaxy S21 and S21+ utilizes either one of two sensors: the Samsung 2LD (Exynos variant) or the Sony IMX555 (Snapdragon variant). [70] They are regarded as nearly identical sensors.
All models use an ultrasonic in-screen fingerprint sensor, except the S24 FE which uses an optical in-screen fingerprint sensor. The S24 series uses a variable refresh rate display with a range of 1 Hz or 24 Hz to 120 Hz, [ 16 ] except the S24 FE which has a range of 60 Hz to 120 Hz [ citation needed ] .
An iPad used by children with its touchscreen covered with fingerprint smudges. A smudge attack is an information extraction attack that discerns the password input of a touchscreen device such as a smartphone or tablet computer from fingerprint smudges.