|
|
Posted by Steve on 12/26/06 17:49
Dear Jan,
I took a look at a higher-end Mustek (5Mpixels) mp4 camera and found that
the VIDEO RES is 640x480. See below...
a.. Stylish 6-in-1 digital video camcorder with 12-megapixel resolution and
10x digital zoom
a.. 5-megapixel CMOS sensor; MPEG-4 video formatting with 640 x 480
resolution @ 30 fps
a.. 2.0-inch TFT LCD display; 32 MB internal memory; SD/MMC memory card slot
a.. Also functions as digital camera, digital voice recorder, MP3 player,
and card reader
a.. Measures 1.61 x 2.91 x 3.86 inches (W x H x D); 1-year limited warranty
http://www.amazon.com/Mustek-5-0-Megapixel-MPEG-4-Digital-Camcorder/dp/B000E263YG
I suggest you capture a bit of video in what you believe to be the camera's
highest resolution, then examine the file on your PC, in whatever
application you have, and check it's properties to learn it's actual
resolution.
PS: what you see in the viewfinder is not representative of the resolution
of the image you are capturing. Your viewfinder's LCD is probably 320x240
or so - every camera is similar.
"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message
news:emrfep$dl4$1@aioe.org...
> On a sunny day (Tue, 26 Dec 2006 09:50:12 -0500) it happened "Steve"
> <no@mail.sorry> wrote in <DEakh.3$jU4.0@newsfe11.lga>:
>
>>I believe that in the case of that Mustek mp4 camera, the 3M pixel
>>resolution is only for stills. Video is captured using 640x480 of that 3M
>>pixels, period.
>
> period? Well yo uare wrong.
> It is easily tested because the picture size does not change if you press
> 'take picture' or 'record movie'.
> Clearly the resize algo had to be present anyways,
> so there is no cost overhead.
> You can see that the resizin gfrom > 640x480 to 640 480 actually happens
> in
> small steps in digital zoom mode.
> It is more smooth once the area used is smaller then 640 wide pixels on
> the
> sensor.
> Different algo I gues, I write both resizes myself once for some Linux
> video application I use, there are man yways to do this.
>
>
>> Digital zooming uses a smaller and smaller portion of that
>>640x480. No camera regardless of price uses more than 720x480 to capture
>>digital video of any sort, anywhere.
>
> Well seems this one does.
> Else you would need 2 sensors or 2 different lenses to project only on
> part of
> the sensor.
>
>> It's all the resolution one needs to
>>get the most out of NTSC TVs. If I am incorrect here, someone please
>>jump
>>in!
>
> Well, 640x480 mpeg4 is not exactly NTSC, ist is intended to play as ASF
> format
> on the PC in the standard 640x480 VGA resolution.
> The camera _has_ a composite out too, but why bother with (PAL) in my
> case.
>
>>As a test, go to a store where you can try out a camera with a long
>>digital
>>zoom (like 300 to 1 or something) and zoom all the way in. You will find
>>you are looking at an image that's about 20 pixels wide!
>
>
> This camera only has 8x digital zoom, so that would be 2048 / 8 = 256
> pixels
> wide if zoomed in.
>
> It is not a good camera, it sucks in all aspects, the sound is rotten too,
> but it fits in a shirt pocket and I have made some decent shots with it as
> long as you do not pan fast.
> It is the one I always have with me...
> All digital, not tapes, >50 minutes on a 1GB SD card.
[Back to original message]
|