Hmmmm...., oh sharp-eyed one...!;-)
I think you are right!
I have seen this effect with the PC-1, but it is noticeable
only under some high-contrast situations, such as the one
you describe. I should have added a lot of "generally's"
and "almost's" to my post...! ;-)
On Tue, 23 Jan 2001 12:20:48 -0500, "Clay Schneider"
>I can very clearly tell the difference between the EIS in my pc7 and the OIS
>in my vx1000. Both shots in full daylight, viewed on a 25" monitor from 6'
>away. The 'correction' on the pc7 is in increments of one pixel
>[horizontally, one scan line], while the 'correction' on the vx1000 is in
>increments smaller than the resolution of the camera.
>
>As a result, high contrast fine horizontal detail [say, electrical wires
>against a bright blue sky] can very clearly be seen to 'jiggle' [the
>aliasing refered to in the following] on the pc7 playback but not on the
>vx1000.
>
>Though newer systems might do interpolation to reduce the aliasing effect
>[which the pc7 does not do], such interpolation could not be done without
>some loss. With current technology, I contend the EIS effect is easy to see
>in a resonably high quality environment if you know what to look for.
>
>Clay
>"Neuman - Ruether"
>news:3a6f9a23.4480239@newsstand.cit.cornell.edu...
>> On Sat, 20 Jan 2001 04:19:09 GMT, "Alexander Ibrahim"
>>
>> >I agree with David's assesment of the implementations, so let me
>> >talk about something else.
>> >
>> >Optical image stabilzation inertially manipulates a prism to
>> >stabilize the image.
>> >
>> >Electronic image stabilization performs transformations on the
>> >image. There is no known way to do these transformations without
>> >causing at least some image degradation.
>> >
>> >So is it noticeable? It depends on how carefully you look and
>> >what type of motion is being corrected for. EIS will always
>> >degrade the image. If you pause the frame and look at high
>> >contrast areas during motion you'll see aliasing and contast
>> >loss. Some "Golden eyed" viewers will see it clearly on normal
>> >playback. Most normal viewers will not notice any but the
>> >grossest errors.
>> [...]
>> Hmmm....;-)
>> It may well be that the motion sensor for EIS is
>> similar to the type used for OIS, but instead of
>> moving a prism, the centering of the read CCD image
>> area is adjusted. If true, there should be no visible
>> difference in the result with either system, given
>> enough light to overcome other differences... In
>> practice, I have never observed the motion artifacts
>> with EIS that AI describes - the image is identical
>> with or without EIS on, still or in motion..