Re: OT: slit camera novel approach
On Sat, 20 Oct 2012 08:11:27 +1100 Brian Walters wrote: There's something similar for Android as well: http://www.androidzoom.com/android_applications/photography/slit-camera_cqcjh.html It gets a lot of negative votes on Google Play but might worth playing with. It works (on a Galaxy S3), but it is NOT the same effect as shown on that webpage. The 'slit' exposes a 'normal' image, but time-sliced. (sort of an exaggerated rolling shutter effect) So, contrary to the examples shown, stationary objects (including the background) are NOT smeared over the whole image to form horizontal lines, but show quite normal. Moving objects get stretched, compressed or otherwise distorted depending on the exaction movements and speed. Would be cool if you could have the slit take the exact same subject spot, and write that left-to-right over the whole image area ... Regards, JvW -- Jan van Wijk; http://www.dfsee.com/gallery -- 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: OT: slit camera novel approach
So, Joe, here's something I've wondered about. Did bus passengers get more docile as cell texting emerged? On Sat, Oct 20, 2012 at 8:23 AM, Jan van Wijk pen...@dfsee.com wrote: On Sat, 20 Oct 2012 08:11:27 +1100 Brian Walters wrote: There's something similar for Android as well: http://www.androidzoom.com/android_applications/photography/slit-camera_cqcjh.html It gets a lot of negative votes on Google Play but might worth playing with. It works (on a Galaxy S3), but it is NOT the same effect as shown on that webpage. The 'slit' exposes a 'normal' image, but time-sliced. (sort of an exaggerated rolling shutter effect) So, contrary to the examples shown, stationary objects (including the background) are NOT smeared over the whole image to form horizontal lines, but show quite normal. Moving objects get stretched, compressed or otherwise distorted depending on the exaction movements and speed. Would be cool if you could have the slit take the exact same subject spot, and write that left-to-right over the whole image area ... Regards, JvW -- Jan van Wijk; http://www.dfsee.com/gallery -- 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. -- Steve Desjardins -- 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: OT: slit camera novel approach
I stopped driving in 2007. At that time, texting had not taken off like it is now. But probably not. Students yes, homeless and disenfranchised are probably stealing other passenger cell phones. Not texting. Same resulting chaos interrupted by inane chatting amongst themselves. Ask Dave Brooks. He probably hears nary a peep on his routes. Is he still driving, or just birdwatching? On Oct 20, 2012, at 06:17 , Steven Desjardins wrote: So, Joe, here's something I've wondered about. Did bus passengers get more docile as cell texting emerged? On Sat, Oct 20, 2012 at 8:23 AM, Jan van Wijk pen...@dfsee.com wrote: On Sat, 20 Oct 2012 08:11:27 +1100 Brian Walters wrote: There's something similar for Android as well: -- 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.
OT: slit camera novel approach
http://www.slate.com/blogs/behold/2012/10/15/jay_mark_johnson_s_very_unusual_camera_emphasizes_time_over_space.html Sincerely, Collin Brendemuehl He is no fool who gives what he cannot keep to gain what he cannot lose -- Jim Elliott -- 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: OT: slit camera novel approach
Those are mesmerizing, especially the dancer and swimmer images. I'm still trying to wrap my head around why they look like they do. This may involve beer. On Fri, Oct 19, 2012 at 1:55 PM, Collin Brendemuehl coll...@brendemuehl.net wrote: http://www.slate.com/blogs/behold/2012/10/15/jay_mark_johnson_s_very_unusual_camera_emphasizes_time_over_space.html Sincerely, Collin Brendemuehl He is no fool who gives what he cannot keep to gain what he cannot lose -- Jim Elliott -- 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. -- Steve Desjardins -- 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: OT: slit camera novel approach
The easiest way to explain it is to describe how the film version works. The camera has a vertical slit the height of the frame. The film moves horizontally past the slit. Anything that is not moving will read as a streak, because from the film's perspective, it's always in the same position as the film moves. Anything that is moving is only recorded as it passes in front of the slit. For racing, it's used to see who passes the finish line first. The first person to cross is clearly shown, and each successive person to cross in front of the slit records farther to the side of the frame. I don't know how the digital version works, maybe a strip sensor that is sampled many times per second and composited in-camera. I wonder if it wouldn't be possible to do something like this for normal cameras and smartphones. It's really quite ingenious, and when you use it as an art tool, you get some striking imagery. The man and horses is my favorite of the set. On Fri, Oct 19, 2012 at 3:38 PM, Steven Desjardins drd1...@gmail.com wrote: Those are mesmerizing, especially the dancer and swimmer images. I'm still trying to wrap my head around why they look like they do. This may involve beer. On Fri, Oct 19, 2012 at 1:55 PM, Collin Brendemuehl coll...@brendemuehl.net wrote: http://www.slate.com/blogs/behold/2012/10/15/jay_mark_johnson_s_very_unusual_camera_emphasizes_time_over_space.html Sincerely, Collin Brendemuehl He is no fool who gives what he cannot keep to gain what he cannot lose -- Jim Elliott -- 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. -- Steve Desjardins -- 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. -- David Parsons Photography http://www.davidparsonsphoto.com Aloha Photographer Photoblog http://alohaphotog.blogspot.com/ -- 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: OT: slit camera novel approach
Good explanation. I missed the idea that the film was moving and not the slit. I'm still having the beer. On Fri, Oct 19, 2012 at 3:50 PM, David Parsons parsons.da...@gmail.com wrote: The easiest way to explain it is to describe how the film version works. The camera has a vertical slit the height of the frame. The film moves horizontally past the slit. Anything that is not moving will read as a streak, because from the film's perspective, it's always in the same position as the film moves. Anything that is moving is only recorded as it passes in front of the slit. For racing, it's used to see who passes the finish line first. The first person to cross is clearly shown, and each successive person to cross in front of the slit records farther to the side of the frame. I don't know how the digital version works, maybe a strip sensor that is sampled many times per second and composited in-camera. I wonder if it wouldn't be possible to do something like this for normal cameras and smartphones. It's really quite ingenious, and when you use it as an art tool, you get some striking imagery. The man and horses is my favorite of the set. On Fri, Oct 19, 2012 at 3:38 PM, Steven Desjardins drd1...@gmail.com wrote: Those are mesmerizing, especially the dancer and swimmer images. I'm still trying to wrap my head around why they look like they do. This may involve beer. On Fri, Oct 19, 2012 at 1:55 PM, Collin Brendemuehl coll...@brendemuehl.net wrote: http://www.slate.com/blogs/behold/2012/10/15/jay_mark_johnson_s_very_unusual_camera_emphasizes_time_over_space.html Sincerely, Collin Brendemuehl He is no fool who gives what he cannot keep to gain what he cannot lose -- Jim Elliott -- 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. -- Steve Desjardins -- 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. -- David Parsons Photography http://www.davidparsonsphoto.com Aloha Photographer Photoblog http://alohaphotog.blogspot.com/ -- 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. -- Steve Desjardins -- 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: OT: slit camera novel approach
On Oct 19, 2012, at 14:50 , David Parsons parsons.da...@gmail.com wrote: I don't know how the digital version works, maybe a strip sensor that is sampled many times per second and composited in-camera. I wonder if it wouldn't be possible to do something like this for normal cameras and smartphones. It's really quite ingenious, and when you use it as an art tool, you get some striking imagery. The man and horses is my favorite of the set. Mine too. For those curious to play with the effect, there is an application for this (free) for iOS (iPhone or iPad) called ScanCamera https://itunes.apple.com/il/app/scancamera/id495845771 -Charles -- Charles Robinson - charl...@visi.com Minneapolis, MN http://charles.robinsontwins.org http://www.facebook.com/charles.robinson -- 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: OT: slit camera novel approach
Quoting Charles Robinson charl...@visi.com: On Oct 19, 2012, at 14:50 , David Parsons parsons.da...@gmail.com wrote: I don't know how the digital version works, maybe a strip sensor that is sampled many times per second and composited in-camera. I wonder if it wouldn't be possible to do something like this for normal cameras and smartphones. It's really quite ingenious, and when you use it as an art tool, you get some striking imagery. The man and horses is my favorite of the set. Mine too. For those curious to play with the effect, there is an application for this (free) for iOS (iPhone or iPad) called ScanCamera https://itunes.apple.com/il/app/scancamera/id495845771 There's something similar for Android as well: http://www.androidzoom.com/android_applications/photography/slit-camera_cqcjh.html It gets a lot of negative votes on Google Play but might worth playing with. Cheers Brian + Brian Walters Australian Native Plants Society (Australia) http://anpsa.org.au -Charles -- Charles Robinson - charl...@visi.com Minneapolis, MN http://charles.robinsontwins.org http://www.facebook.com/charles.robinson -- 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. -- Cheers Brian ++ Brian Walters Western Sydney Australia http://lyons-ryan.org/southernlight/ -- 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: OT: slit camera novel approach
Method used in many non-digital recce cameras going way back. Depending on speed, altitude, etc, BOTH the slit and the film move in a dance that realizes a long strip of exposed film. Sometimes the slit moves with but slower than the film, sometimes the slit may move opposite the direction of the film. Depends on the parameters mentioned above. Developed as a replacement for the cameras with vacuum platens that would hold the film, while the platen moved in the camera (opposite to the direction of flight) to allow sufficient light to expose the film while the ground was moving by under the plane. Then sweealthuk on to the next frame. Happened real fast. While serving, I learned (had to) the intricacies of the NCCS-4 system. (Navy Camera Control System - 4th gen). The pilot turned thumb wheels on the stick (jets man) to set the altitude, air speed, and another parameter I no longer can bring up. These inputs controlled a series of relays that chose voltages to send that set the rate of stepper motors in two boxes per camera station. Each box contained several of these stepper motors, connected to a lunch box sized train of stainless gears on shafts, which ultimately controlled the shutter speed, aperture, platen speed, or went platenless where the film just ran past the platen (focal plane) drawn by motors, also controlled by this system. Ain't analog wonderful? No, I don't have the schematics. Anymore. Post K-17, pre KH-12. if you know what I mean. On Oct 19, 2012, at 12:57 , Steven Desjardins wrote: Good explanation. I missed the idea that the film was moving and not the slit. I'm still having the beer. On Fri, Oct 19, 2012 at 3:50 PM, David Parsons parsons.da...@gmail.com wrote: The easiest way to explain it is to describe how the film version works. The camera has a vertical slit the height of the frame. The film moves horizontally past the slit. Anything that is not moving will read as a streak, because from the film's perspective, it's always in the same position as the film moves. Anything that is moving is only recorded as it passes in front of the slit. For racing, it's used to see who passes the finish line first. The first person to cross is clearly shown, and each successive person to cross in front of the slit records farther to the side of the frame. I don't know how the digital version works, maybe a strip sensor that is sampled many times per second and composited in-camera. I wonder if it wouldn't be possible to do something like this for normal cameras and smartphones. It's really quite ingenious, and when you use it as an art tool, you get some striking imagery. The man and horses is my favorite of the set. -- 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.
