Magic Lantern Forum

Developing Magic Lantern => Feature Requests => Topic started by: Oswald on March 08, 2014, 08:31:34 AM

Title: [IMPOSSIBLE] Hdr mode by changing shutter speed?
Post by: Oswald on March 08, 2014, 08:31:34 AM
I know that canon cameras has hdr video function. But unfortunately fast moves creates "ghosting". So is it possible to make hdr video by changing shutter speed every  frame? It should not create ghosting.

My English is not so great, hope you understand. :)

http://www.red.com/learn/red-101/hdrx-high-dynamic-range-video
Title: Re: Hdr mode by changing shutter speed?
Post by: a1ex on March 08, 2014, 08:57:50 AM
Looking forward to a proof about how changing shutter speed reduces ghosting.

Meanwhile, try this link: http://www.red.com/store ;)
Title: Re: Hdr mode by changing shutter speed?
Post by: kgv5 on March 08, 2014, 09:57:52 AM
Quote from: Oswald on March 08, 2014, 08:31:34 AM
I know that canon cameras has hdr video function. But unfortunately fast moves creates "ghosting". So is it possible to make hdr video by changing shutter speed every  frame? It should not create ghosting.

My English is not so great, hope you understand. :)

http://www.red.com/learn/red-101/hdrx-high-dynamic-range-video

HDR will cause motion artifacts, HDRx is not an exception. Those artifacts will be slightly different, wheather it is shutter speed or ISO values. DSLRs have exceptional iso performance (even compared to red) so using it is very good idea.

For achieving smiliar results, no motion artifacts but little bit of moire and aliasing - use dualISO.
We have a choice - motion artifacts vs image quality artifacts.