Nokia 1020 A00014474 用户手册
产品代码
A00014474
oversampling results in 5mP photos with
amazing detail
In traditional imaging systems, the true resolution of the
system is lower than that of the nominal sensor resolu-
tion. The traditional camera sensor resolution may be
5MP, but it does not really capture photos that have five
million pixels of independent data. The data is spread
across multiple pixels causing, for example, blurring and
artifacts. There are two technical reasons for this: one is
related to the optics design and aliasing, and the other
to the way the sensor samples the data with Bayer co-
lour filters. A traditional 5MP camera has only 2.5 million
green pixels and 1.25 million red and blue pixels
system is lower than that of the nominal sensor resolu-
tion. The traditional camera sensor resolution may be
5MP, but it does not really capture photos that have five
million pixels of independent data. The data is spread
across multiple pixels causing, for example, blurring and
artifacts. There are two technical reasons for this: one is
related to the optics design and aliasing, and the other
to the way the sensor samples the data with Bayer co-
lour filters. A traditional 5MP camera has only 2.5 million
green pixels and 1.25 million red and blue pixels
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for
example. See Figure 3 for a comparison in sharpness of
a standard 5MP image versus an oversampled 5MP im-
age and Figure 4 for an illustration of how oversampling
reduces noise compared with a standard sensor.
a standard 5MP image versus an oversampled 5MP im-
age and Figure 4 for an illustration of how oversampling
reduces noise compared with a standard sensor.
The oversampling technology in the Lumia 1020 makes
it possible to solve both of these issues, and enables
full details to be captured with the 5MP image, visible
as amazing sharpness, naturalness and low noise. It is
physically impossible to capture this with a traditional
5MP camera.
it possible to solve both of these issues, and enables
full details to be captured with the 5MP image, visible
as amazing sharpness, naturalness and low noise. It is
physically impossible to capture this with a traditional
5MP camera.
Figure 3. Comparison of a standard 5MP image and an oversampled 5MP image.
Figure 4. Illustration of how oversampling reduces noise compared with a standard 5MP sensor
Output from a standard 5MP sensor shows noise as variance in the signal
Output from a high resolution sensor before oversampling
Output after oversampling reduces the noise
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