view of the antishake Lens shift value to avoid unsharp pictures - Feature Requests - CHDK Forum

view of the antishake Lens shift value to avoid unsharp pictures

  • 4 Replies
  • 2533 Views
view of the antishake Lens shift value to avoid unsharp pictures
« on: 02 / November / 2010, 14:54:56 »
Advertisements
I have the idea that a rectangle and a dot in the middle that show the X and Y shift of the lens value can avoid unsharp pictures.the rectangle is the maximum lens antishake shift possible.
Because the photographer can hold the Camera in that way, that the lens shift dot is in the middle.
so the Anti shake lens shift have better range to correct a shake.

I can for example with my Ixus 1000 at 36 mm take a sharp image at 1 sec exposure time freehand
but its not easy, i must move the camera in all 4 ways and look  when the image move in all sides.now i must try to move the camera in the middle position.
but when see the lens shift value this is much better possible.

Is it possible to read this values out and print them with chdk ?
And last not least, do you think is that a usefull function to add to chdk ?
best is when the values are also update during exposure.so the photgrapher have a feedback if he have his camera hold good.
 
« Last Edit: 02 / November / 2010, 14:59:15 by Bernd R »
Ixus 1000 HS

*

Offline fudgey

  • *****
  • 1705
  • a570is
Re: view of the antishake Lens shift value to avoid unsharp pictures
« Reply #1 on: 02 / November / 2010, 15:29:25 »
I'm not sure if anyone's done anything since dataghost's experiments in http://chdk.setepontos.com/index.php?topic=1365.msg12384#msg12384, but back then it clearly was possible to read useful values from the IS system.

Thanks to the Lua native calls and evenprocs it's probably quite a bit easier to experiment with this stuff now than back in 2008. I have no comment on the usefulness, but having such a display might reveal whether it is useful or not :)

Re: view of the antishake Lens shift value to avoid unsharp pictures
« Reply #2 on: 29 / January / 2011, 23:30:06 »
Perhaps another way to look at this is as an inverse of motion detection; when the camera is NOT moving it would take the picture. This might be done as a script command, maybe a new parameter for md_detect_motion. This feature exists on many other cameras already.

*

Offline fudgey

  • *****
  • 1705
  • a570is
Re: view of the antishake Lens shift value to avoid unsharp pictures
« Reply #3 on: 30 / January / 2011, 04:36:47 »
Perhaps another way to look at this is as an inverse of motion detection; when the camera is NOT moving it would take the picture. This might be done as a script command, maybe a new parameter for md_detect_motion. This feature exists on many other cameras already.

Already did that using md_detect_motion years ago... see http://chdk.setepontos.com/index.php?topic=1046.msg9260#msg9260


Re: view of the antishake Lens shift value to avoid unsharp pictures
« Reply #4 on: 30 / January / 2011, 10:11:56 »
i dont know how motion detection work, but i guess it use the Display buffer.If the camera have a 230000 Pixel TFT then motion detection is done in 360*240 in 4:3 display.so resolution is very large.use a raw buffer camera is not fast enough

also problem is that when no motion is detect, it can change when shoot is done.because this is then 1/8 sec or so later.
so see the current movement of the IS system, you can keep hold your Camera so that there is in left/right up/down enough movement possible.

its simular as for a aircraft a attitide indicator.

http://en.wikipedia.org/wiki/Attitude_indicator

but on Camera this show that you move the camera not out of IS range.
« Last Edit: 30 / January / 2011, 10:14:15 by Bernd R »
Ixus 1000 HS

 

Related Topics