thanks guys,

okay...this picture is looking as a proof that manually set temperature span can be set down to 2C. However, as I can observe from the feedback, not all users are blessed with such the low span

From this I conclude, that there is some setting which can be adjusted, which is default for the E8 (the latter case) to 4C and altered to 2C (the former case). Again, how it is called and where it can be adjusted? Can it be then adjusted to even smaller span? 1C? 0.5C? There are applications which would benefit greatly from such the low span setting.

Returning to the proof kindly provided, I must say that it proves nothing. If the whole span is -20C to 250C and the 14th bit is 15MKelvin (near noise), for 2C set span, we have ~7 bits (133 > 128 levels ) resolution, so this is again enough to see an unbanded image on such the low pixels count.

In other words, I still cannot see does the E4 hardware set the temperature span on its ADC or it doesn't.

But if Bud would be so kind to run simple statistics on the image, he would give us a good hint ... 7 bits are pretty visible on histogram (all the numbers falls into 128 bins not equally in count, but there are no numbers in between them - test with noise generator parameter set to 0!)

If, however, the ADC really sets its limits according manual setting, all the numbers will be different.

Also in this case thermal image entropy value calculated will be much higher than for the 7 bit image.

If the latter is true, we can de-convolute the tempral noise and much of the other types of noise by special procedures from statistical image processing, thus obtaining true, hi-res, low temperature span image and a branch of new applications for E4 arrives!

Regards,

Solare