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Forum: Pentax DSLR Discussion
04-29-2010, 12:23 AM
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Hi there
this is just something that crossed my mind this morning, but not having the competences to develop this myself I just wanted to throw it out in the hopes that somebody with the required competences picks it up and does something with it (unless of course my idea is completely non sensical)
Since DSLR video is currently only able to use a fraction of the actual resolution of the sensor to record moving images, wouldn't it be possible to use this limitation and turn it into an advantage by creating something like a stochastic readout of the sensor to avoid moiré patterns (rather than blurring the image with mechanical means like the Caprock and such).
The basic idea would be instead of reading out for instance every third line of the sensor to read out the same amount of information, but in a less regular, more random pattern, possibly even changing the readout pattern between every frame.
I obviously have no idea how complicated it would be to implement such a feature, but if I look at the effort put into the development of compressing video into ever smaller data sizes I can't help but think, that it might just be a matter of shifting priorities.
Anyway, just a thought, not sure what it's worth
Then of course, before getting there it might already be nice to have a 25fps option for those K-7 users residing in Europe hoping to record video under artificial light and maybe even a way to control shutter speed and ISO directly, but that is a whole other matter of priorities I guess...
Best
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Forum: Video Recording and Processing
04-29-2010, 12:13 AM
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Hi there
this is just something that crossed my mind this morning, but not having the competences to develop this myself I just wanted to throw it out in the hopes that somebody with the required competences picks it up and does something with it (unless of course my idea is completely non sensical)
Since DSLR video is currently only able to use a fraction of the actual resolution of the sensor to record moving images, wouldn't it be possible to use this limitation and turn it into an advantage by creating something like a stochastic readout of the sensor to avoid moiré patterns (rather than blurring the image with mechanical means like the Caprock and such).
The basic idea would be instead of reading out for instance every third line of the sensor to read out the same amount of information, but in a less regular, more random pattern, possibly even changing the readout pattern between every frame.
I obviously have no idea how complicated it would be to implement such a feature, but if I look at the effort put into the development of compressing video into ever smaller data sizes I can't help but think, that it might just be a matter of shifting priorities.
Anyway, just a thought, not sure what it's worth
Then of course, before getting there it might already be nice to have a 25fps option for those K-7 users residing in Europe hoping to record video under artificial light and maybe even a way to control shutter speed and ISO directly, but that is a whole other matter of priorities I guess...
Best
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Forum: Video Recording and Processing
04-10-2010, 12:01 AM
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Hi
I really like the video feature of the K7 and I make a rather extensive use of it in my work designing projections for live performances.
I have come across an issue that has been relatively little discussed on this forum and that concerns the flickering of the video under artificial light most particularly in Europe where the electrical current alternates at 50hz a second, rather then the 60hz in the US and in Japan.
Without the ability to set the shutter speed to a multiple of the 50hz frequency (like 1/25 or 1/50) or set the frame rate to 25fps I see little hope to eliminate the flicker.
Has anybody experienced this issue, or more importantly has anybody found a workaround to it. Or do I have to wait for a firmware update from Pentax to solve this issue?
Thanks
Ruppert
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