Re: Comparisons of images between Dazzle DVC100, EasyCap stk1160 and Hauppauge ImapctVCB-e in Linux.

[Steve Cookson <it@sca-uk.com>]

Hi Guys,

(I'm copying Ezequial on this because of the work he has done on the 
stk1160).

My colleague (a Doctor) had this to say on the medical images I posted 
earlier (see below):

 >  The impactVCB-e image is redder and less clear. The dvc100 and 
easycap seem similar to me and both of them are not as good as the 
original one.

So I have to ask how is it that the cheap little EasyCap is performing 
at the same level as the Dazzle DVC100 and better than the ImpactVCB-e?

It seems to me that the more complex and expensive DVC100 and 
ImpactVCB-e should perform well and that the EasyCap should be the 
runner up.

If the DVC100 and ImpactVCB-e had had the same love and attention that 
Ezequial has shown the EasyCap would they outperform it?

The ImpactVCB-e is easier to use internally and the Dazzle is external.  
Does the fact that the ImpactVCB-e has a PCI-e connector help it at all?

Otherwise I should just focus on EasyCap for my raw SD capture and move on.

Thanks,

Steve


On 23/04/14 16:22, Steve Cookson wrote:
> Hi Guys,
>
> I would be interested in your views of the comparisons of these 
> images.  The still is the image of a duodenum taken during an 
> endoscopy and recorded to a DVD player (via an s-video or composite 
> cable).  Although the endoscope is an HD endoscope, the DVD recorder 
> isn't and the resulting video is 720x480i59.94.
>
> Here are further details of the video:-
>
> Format : MPEG Video v2
> Format profile : Main@Main
> Format settings, BVOP : Yes, Matrix : Custom, GOP : M=3, N=15
> Bit rate mode : Variable
> Bit rate : 4 566 Kbps
> Maximum bit rate : 10 000 Kbps
> Width : 720 pixels
> Height : 480 pixels
> Display aspect ratio : 4:3
> Frame rate : 29.970 fps
> Standard : NTSC
> Color space : YUV
> Chroma subsampling : 4:2:0
> Bit depth : 8 bits
> Scan type : Interlaced
> Scan order : Top Field First
> Compression mode : Lossy
> Bits/(Pixel*Frame) : 0.441
>
> The video was played through Dragon Player and the video signal has 
> exited through a mini-VGA port defined as 640x480 and passed through a 
> VGA->S-Video converter to an s-video cable.
>
> The cable has in turn been connected in turn to a Dazzle DVC100, an 
> EasyCap stk1160 and a Hauppauge ImapctVCB-e.
>
> Each setting (eg brightness and contrast etc) has as near as possible 
> to mid-range and a screengrab taken.
>
> The results are shown here:
>
> Original: 
> http://tinypic.com/usermedia.php?uo=fNkd6hpTbcMrgmD6gSf74Ih4l5k2TGxc
>
> Dazzle DVC100: 
> http://tinypic.com/usermedia.php?uo=fNkd6hpTbcMaOf4QTsIefYh4l5k2TGxc
>
> ImpactVCB-e: 
> http://tinypic.com/usermedia.php?uo=fNkd6hpTbcM7i72IqGujuIh4l5k2TGxc
>
> STK1160: 
> http://tinypic.com/usermedia.php?uo=fNkd6hpTbcPO7kmQk/IS94h4l5k2TGxc
>
> I would be grateful for your views on the quality of the images.
>
> Is one of materially higher quality than the others, or can I adjust 
> the settings to improve the quality of one of them more.
>
> It seems to me that the Hauppauge is marginally better than the 
> others.  What do you think?
>
> Can I improve the test?
>
> Regards
>
> Steve.
>
>
>
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