Hi!
As I said before, the last webcam I bought was useless it was not Linux fault. I went to the Steren Shop and they changed it to me for another webcam, this time the COM-105 one, wich uses other USB Driver and works perfectly with Cheese by just plugging it.
The cam also works with my Windows 7 VM very well, but I have a New problem:
In the webcam features, it says the cam has a 5MP resolution interpolated, but in the instructions it says the cam has a 1.3 MP Resolution, wich is really poor for what I wanna do.
¿How can I reach that 5MP Resolution in Linux? ¿What does that mean? ¿Does this webcam can really record a 5MP Video? ¿How can I do it?
Thanks!
P.S. No matter I use Cheese or the Webcam's recording software for Windows, the resolution is very very poor :(
On Tue, Nov 2, 2010 at 10:55 AM, Manuel Escudero Jmlevick@gmail.com wrote:
¿How can I reach that 5MP Resolution in Linux? ¿What does that mean? ¿Does this webcam can really record a 5MP Video? ¿How can I do it?
I'm no expert (and someone can correct me), but my guess is that the hardware is 1.3MP, but the camera's software can use an algorithm to artificially increase the resolution to 5MP. Interpolation is the method used to do this.
I don't think you'll get anything more than 1.3MP out of it, and even if you did, it wouldn't be "real" video.
-c
It is a nasty marketing trick. You have 1.3X MP camera and every pixel has three sub-pixels (red, green, blue). So the total amount of (sub)pixels is: 3 x 1.3X ~= 5MP. Another trick is that the higher "resolution" - understand the size of image - is artificially increased using an interpolation.
If you need a real 5MP resolution you need a 5MP camera, not 1.3MP, there is no way, how to cheat it.
Vaclav M.
On 11/01/2010 11:55 PM, Manuel Escudero wrote:
Hi!
As I said before, the last webcam I bought was useless it was not Linux fault. I went to the Steren Shop and they changed it to me for another webcam, this time the COM-105 one, wich uses other USB Driver and works perfectly with Cheese by just plugging it.
The cam also works with my Windows 7 VM very well, but I have a New problem:
In the webcam features, it says the cam has a 5MP resolution interpolated, but in the instructions it says the cam has a 1.3 MP Resolution, wich is really poor for what I wanna do.
¿How can I reach that 5MP Resolution in Linux? ¿What does that mean? ¿Does this webcam can really record a 5MP Video? ¿How can I do it?
Thanks!
P.S. No matter I use Cheese or the Webcam's recording software for Windows, the resolution is very very poor :(
-- <-Manuel Escudero-> Linux User #509052 @GWave: jmlevick@googlewave.com mailto:jmlevick@googlewave.com @Blogger: http://www.blogxenode.tk/ (Xenode Systems Blog) PGP/GnuPG: DAE3 82E9 D68E 7AE4 ED31 1F8F 4AF4 D00C 50E7 ABC6
On 11/02/2010 01:11 AM, Vaclav Mocek wrote:
It is a nasty marketing trick. You have 1.3X MP camera and every pixel has three sub-pixels (red, green, blue). So the total amount of (sub)pixels is: 3 x 1.3X ~= 5MP.
Of cause 3 x1.3 is not 5MP and I am going to sleep because ....
Another trick is that the higher "resolution" - understand the size of image - is artificially increased using an interpolation.
If you need a real 5MP resolution you need a 5MP camera, not 1.3MP, there is no way, how to cheat it.
Vaclav M.
On 11/01/2010 11:55 PM, Manuel Escudero wrote:
Hi!
As I said before, the last webcam I bought was useless it was not Linux fault. I went to the Steren Shop and they changed it to me for another webcam, this time the COM-105 one, wich uses other USB Driver and works perfectly with Cheese by just plugging it.
The cam also works with my Windows 7 VM very well, but I have a New problem:
In the webcam features, it says the cam has a 5MP resolution interpolated, but in the instructions it says the cam has a 1.3 MP Resolution, wich is really poor for what I wanna do.
¿How can I reach that 5MP Resolution in Linux? ¿What does that mean? ¿Does this webcam can really record a 5MP Video? ¿How can I do it?
Thanks!
P.S. No matter I use Cheese or the Webcam's recording software for Windows, the resolution is very very poor :(
-- <-Manuel Escudero-> Linux User #509052 @GWave: jmlevick@googlewave.com mailto:jmlevick@googlewave.com @Blogger: http://www.blogxenode.tk/ (Xenode Systems Blog) PGP/GnuPG: DAE3 82E9 D68E 7AE4 ED31 1F8F 4AF4 D00C 50E7 ABC6
2010/11/1 Vaclav Mocek little.owl@email.cz
On 11/02/2010 01:11 AM, Vaclav Mocek wrote:
It is a nasty marketing trick. You have 1.3X MP camera and every pixel has three sub-pixels (red, green, blue). So the total amount of (sub)pixels is: 3 x 1.3X ~= 5MP.
Of cause 3 x1.3 is not 5MP and I am going to sleep because ....
Another trick is that the higher "resolution" - understand the size of image - is artificially increased using an interpolation.
If you need a real 5MP resolution you need a 5MP camera, not 1.3MP, there is no way, how to cheat it.
Vaclav M.
On 11/01/2010 11:55 PM, Manuel Escudero wrote:
Hi!
As I said before, the last webcam I bought was useless it was not Linux fault. I went to the Steren Shop and they changed it to me for another webcam, this time the COM-105 one, wich uses other USB Driver and works perfectly with Cheese by just plugging it.
The cam also works with my Windows 7 VM very well, but I have a New problem:
In the webcam features, it says the cam has a 5MP resolution interpolated, but in the instructions it says the cam has a 1.3 MP Resolution, wich is really poor for what I wanna do.
¿How can I reach that 5MP Resolution in Linux? ¿What does that mean? ¿Does this webcam can really record a 5MP Video? ¿How can I do it?
Thanks!
P.S. No matter I use Cheese or the Webcam's recording software for Windows, the resolution is very very poor :(
-- <-Manuel Escudero-> Linux User #509052 @GWave: jmlevick@googlewave.com @Blogger: http://www.blogxenode.tk/ (Xenode Systems Blog) PGP/GnuPG: DAE3 82E9 D68E 7AE4 ED31 1F8F 4AF4 D00C 50E7 ABC6
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Thanks for your tips. I was reading the Webcam's box and it says it has "5MP resolution (interpolated)" And in the webcam's instructions, it says it has "1.3MP Resolution (interpolated)" I believe I'm going to complain at the store because, they are selling cameras mentioning one resolution in the box and other completely different in the instructions.
That's no Fair.
On Mon, 2010-11-01 at 17:55 -0600, Manuel Escudero wrote:
In the webcam features, it says the cam has a 5MP resolution interpolated, but in the instructions it says the cam has a 1.3 MP Resolution, wich is really poor for what I wanna do.
Interpolated means artificially created resolution. You don't actually get more detail.
Imagine an image formed from the following bitmap:
*** ***** *******
Take that as being the actual resolution of a device. Now, double everything up.
****** ****** ********** ********** ************** **************
You get a bigger, but chunky picture. Interpolating is increasing the picture size, but not as a simple doubling up. It's making assumptions about what would be in between the original picture. It'd space apart the original data, and fill in the dots between (as a simplistic approach). So you'd get a much more triangular-looking object than my second example (less steps).
Depending on how good the interpolation is, it will look better than simply magnifying the picture, but not as good as a picture that actually was higher resolution.
-
Chris Smart -
little.owl -
Manuel Escudero -
Tim