Nokia 1020 A00014472 用户手册

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A00014472
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systems and it is extremely difficult to achieve bench-
mark performance in both simultaneously. However this 
is exactly what we have done with the Nokia Lumia 1020. 
sharpness is more than just 
megapixels
Resolution is the sum of several parts in the imaging 
chain, starting from how we capture images, how much 
hand-shake is involved, and ending with technical func-
tions including the camera optics, the image sensor, and 
the algorithms. It´s not enough to just include a high 
megapixel sensor – the lenses conveying the image to 
the sensor have to be of equally high quality. 
Together with our partner Carl Zeiss, we yet again 
pushed the limits of optical design to match the reso-
lution of the 41 megapixel camera sensor. To provide 
the best optical resolution we increased the number of 
lenses  used  from  the  five  in  the  award-winning  Nokia 
808 PureView, to six. The first lens element is made of 
high precision glass, and five of the lenses are mould-
ed high-performance plastic, taking lens manufacturing 
precision to the next level. 
The lenses are physically very big for a smartphone, and 
the optical assembly alone is unique. But that is not all. 
We put the whole system inside a completely new kind 
of optical image stabilisation system, which uses an 
extremely high accuracy sensing system linked to very 
small motors which actively move the lens. 
The extremely sharp image projected by the six-element 
lens system is recorded by the second generation 41MP 
BSI sensor, capturing even the smallest of details in the 
scene, including detail not visible to the naked eye. 
The 41MP sensor can capture 34MP and 38MP image 
files at 16:9 and 4:3 aspect ratios respectively. In addi-
Figure 2. Six Carl Zeiss lenses including a high-precision glass element. Illustration only.
tion to the 38MP and 34MP full-resolution images, the 
Lumia 1020 camera captures 5MP oversampled images 
so that every pixel in the 5MP image has been created 
using the data from up to seven pixels of the sensor. 
The oversampling technology ensures that these 5MP 
images are incredibly sharp, natural and low noise.  The 
best part is that the camera saves both the full resolu-
tion and oversampled image simultaneously. 
This is referred to as dual capture. It enables creative 
post-processing while still allowing users to share a 
high-quality small file size image straight after shoot-
ing.
why 5mP?
5MP is the sweet spot for image quality that is easy to 
share and printable up to A3 size. And because our 5MP 
images condense the information from the 41MP sen-
sor, they have amazingly high image quality.
The 5MP images get the full benefit of the oversampling 
technology and their quality is way above that produced 
by any traditional imaging device.  In addition to over-
sampling, the 41MP sensor can also be used for lossless 
or high resolution zooming (see page 6).
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