Dec 132009


several users of the TIS DMK21 series cameras reported ring like ghost image artefacts in their images that seem to duplicate bright highly contrasted rims in the images. I tried to reproduce these artefacts with an indoor test setup and have been successfull. The artefacts appear when the camera is operating at 60 frames per second only. It seems that 60fps should be avoided for our imaging application, what a bummer :( Please read the complete article for details.

Clear skies,

Nov 162009

November 11, 2009:  The Imaging Source announced their GigE cameras to be available with 10Bit output, read the Blog post. Up to now all TIS cameras featured a 10 Bit analog to digital conversion of the CCD signal but only 8Bit output. The new feature supported by the YGB0 10 bit grayscale format will not be available for IEEE1394 and USB models but Gigabit Ethernet interface cameras only. The GigE models cost 150€ more than the Firewire/USB counterparts – not a too attractive pricing. The cameras seem to be identical to their 8Bit predecessors in terms of CCD selection and A/D conversion so that the additional quite expensive 2 bits are not too desirable. It has to be proofed that full well capacity of the CCD models and noise level of the cameras justifies these additional bits, I doubt any real practical advantage.

From my point of view moving to more than 8 bits for the GigE cameras only – otherwise unchanged – comes far to late. The new generation of cameras from other brands featuring new CCD models like the Sony ICX445, 12 bits A/D conversion or more and advanced features like true ROI, binning etc. look far more attractive – stay tuned for more camera news coming shortly…

Cheers, Oliver

P.S.: Taking a look at the maximum framerates of the GigE models shows that these are identical to the IEEE1394/USB2.0 models – no advantage here…