Re: 80mp is 80mp continued

Started 1 month ago | Discussions thread
ForumParentFirstPrevious
Flat view
Rudi Senior Member • Posts: 1,422
Re: 80mp is 80mp continued
2

to answer this posting from TN Args :

https://www.dpreview.com/forums/post/62183601

It doesn´t matter in how many steps and how big a step size (1/10th, 1/8th or 1/4 steps horizontal or vertical or both) you scan the projection of the lens. You can´t increase the physical number of your sensor pixels. You can calculate the data you collect from the scanning process in a number of different ways, but you never get more than 20MPx.

In other words you collect more Information for each pixel position according to your number of scans (shifts) but you don´t get more pixels this way.

Increasing the pixel count of the result you got by shifting the 20MPx sensor is pure mathematical calculation but never a true representation of the scene you capture with the first frame (before starting the shifting process) shot with the 20MPx sensor. Shifting steps take a certain amount of time and even if it´s in the range of nanoseconds, light is faster and every little change in your scene gives you a different scan result (result of capturing the new position your sensor shifted to).

This is the reason why a picture taken in the so called HiRes mode allways has some kind of artificial look to it. It is never a true reprensentation of the Initial first opening of the shutter. And that is why HiRes mode should not be used for capturing moving subjects.

HiRes mode gives you a 20MPx image with more Information, but never a direct 80MPx Image. More than 20MPx out of a 20MPx sensor is just plain upscaling, nothing else.

Rudi.

ForumParentFirstPrevious
Flat view
Post (hide subjects) Posted by
NCV
ForumParentFirstPrevious
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow