Nokia 1020 A00013475 用户手册

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

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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.

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.

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