Re: Pixel Shift: Any advantage to NOT using motion correction?
I think its just doing a simple pass looking for ghosting and substituting the information from a single frame much like HDR software does. It doesn't seem perfect, but it is impressive that it even works at all to be honest. You can easily extract a single frame and use that to correct any left over errors in Photoshop too. Nifty. On Sun, Mar 12, 2017 at 5:04 PM, Mark C wrote: > I tried testing processing times using a stop watch - big margin of > error.There might have been a slight difference in processing speed between > motion corrected and non motion corrected processing times when the subject > was moving, but slight enough to be trivial. I tired all combinations - MC > on, MC off, static subject, moving subject. Times seemed about the same > though motion correction made a huge difference in scenes were things were > moving. > > Mark > > On 3/11/2017 4:28 PM, Larry Colen wrote: >> >> >> >> Larry Colen wrote: >>> >>> Processing time per photo? >> >> >> Now that I'm at a real keyboard >> >> Basic pixel shift is pretty trivial, just sum up the information from four >> exposures. Doing motion correction is pretty computationally intensive, you >> need to figure out what things moved, by how much, and how to correct them, >> across four different images. >> >> Some of that can be alleviated by having a deep buffer, in exactly the way >> the K-1 doesn't. That way, you could at least take a few photos before the >> buffer fills up. >> >> To test, I'd set up a scene, maybe a static scene with one moving element >> (clock with a second hand?), take a series of photos in static pixel shift >> and time how long it takes until the write light goes out, then try the same >> thing with dynamic pixel shift. >> >>> >>> On March 11, 2017 8:50:35 AM PST, Mark C wrote: I've been looking around to see what is lost when pixel shift is set to Motion correction mode and haven't found any information about it. It seems that by giving you the option to select between enabling motion correction or not, there must be some situation when non-corrected mode is better, or perhaps even there is some overall lower quality when motion correction is on...? The K1 manual doesn't rally address the question, just saying that one mode corrects for moving objects and the other doesn't. Why is non motion corrected mode included on the menu at all? Mark >>> >>> >> > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pixel Shift: Any advantage to NOT using motion correction?
I tried testing processing times using a stop watch - big margin of error.There might have been a slight difference in processing speed between motion corrected and non motion corrected processing times when the subject was moving, but slight enough to be trivial. I tired all combinations - MC on, MC off, static subject, moving subject. Times seemed about the same though motion correction made a huge difference in scenes were things were moving. Mark On 3/11/2017 4:28 PM, Larry Colen wrote: Larry Colen wrote: Processing time per photo? Now that I'm at a real keyboard Basic pixel shift is pretty trivial, just sum up the information from four exposures. Doing motion correction is pretty computationally intensive, you need to figure out what things moved, by how much, and how to correct them, across four different images. Some of that can be alleviated by having a deep buffer, in exactly the way the K-1 doesn't. That way, you could at least take a few photos before the buffer fills up. To test, I'd set up a scene, maybe a static scene with one moving element (clock with a second hand?), take a series of photos in static pixel shift and time how long it takes until the write light goes out, then try the same thing with dynamic pixel shift. On March 11, 2017 8:50:35 AM PST, Mark C wrote: I've been looking around to see what is lost when pixel shift is set to Motion correction mode and haven't found any information about it. It seems that by giving you the option to select between enabling motion correction or not, there must be some situation when non-corrected mode is better, or perhaps even there is some overall lower quality when motion correction is on...? The K1 manual doesn't rally address the question, just saying that one mode corrects for moving objects and the other doesn't. Why is non motion corrected mode included on the menu at all? Mark -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pixel Shift: Any advantage to NOT using motion correction?
Larry Colen wrote: Processing time per photo? Now that I'm at a real keyboard Basic pixel shift is pretty trivial, just sum up the information from four exposures. Doing motion correction is pretty computationally intensive, you need to figure out what things moved, by how much, and how to correct them, across four different images. Some of that can be alleviated by having a deep buffer, in exactly the way the K-1 doesn't. That way, you could at least take a few photos before the buffer fills up. To test, I'd set up a scene, maybe a static scene with one moving element (clock with a second hand?), take a series of photos in static pixel shift and time how long it takes until the write light goes out, then try the same thing with dynamic pixel shift. On March 11, 2017 8:50:35 AM PST, Mark C wrote: I've been looking around to see what is lost when pixel shift is set to Motion correction mode and haven't found any information about it. It seems that by giving you the option to select between enabling motion correction or not, there must be some situation when non-corrected mode is better, or perhaps even there is some overall lower quality when motion correction is on...? The K1 manual doesn't rally address the question, just saying that one mode corrects for moving objects and the other doesn't. Why is non motion corrected mode included on the menu at all? Mark -- Larry Colen l...@red4est.com (postbox on min4est) http://red4est.com/lrc -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pixel Shift: Any advantage to NOT using motion correction?
Processing time per photo? On March 11, 2017 8:50:35 AM PST, Mark C wrote: >I've been looking around to see what is lost when pixel shift is set to > >Motion correction mode and haven't found any information about it. It >seems that by giving you the option to select between enabling motion >correction or not, there must be some situation when non-corrected mode > >is better, or perhaps even there is some overall lower quality when >motion correction is on...? > >The K1 manual doesn't rally address the question, just saying that one >mode corrects for moving objects and the other doesn't. > >Why is non motion corrected mode included on the menu at all? > >Mark -- Sent from my Android phone with K-9 Mail. Please excuse any swypos. http://red4est.com/lrc -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Pixel Shift: Any advantage to NOT using motion correction?
I've been looking around to see what is lost when pixel shift is set to Motion correction mode and haven't found any information about it. It seems that by giving you the option to select between enabling motion correction or not, there must be some situation when non-corrected mode is better, or perhaps even there is some overall lower quality when motion correction is on...? The K1 manual doesn't rally address the question, just saying that one mode corrects for moving objects and the other doesn't. Why is non motion corrected mode included on the menu at all? Mark -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
