Products > Thermal Imaging

Yet another cheap thermal imager incoming.. Seek Thermal

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MLutz:

--- Quote from: eneuro on November 27, 2014, 10:31:04 am ---
--- Quote from: MLutz on November 27, 2014, 10:16:18 am ---here is the same pic as before with °F, sorry, i forgot that...

--- End quote ---
Yep, it will be fun to see what they did wrong in his new app if we'll have decompiled sources if possible of this new "sick" version.
Anyway emissivity settings are the same as in previous 1.4.0 version and correct for skin?
Did you tried install previous version and set the same emissivity, temp units and compare?
I can't believe they did not noticed something like this during testing  :o

BTW: md5sums are fine, so we have the same versions of "Sick" Thermal 1.6.0 apk  :-DD

--- End quote ---

lol @sick thermal...  :clap:

i checked emissivity and there is no difference!
when i uninstall 1.6 and reinstall 1.4.2 temps are back to normal...

btw. with 1.6 the gradient does look better as with 1.4.2, but not as much as i hoped!
but i'm with aurora: for this money this is a very nice device. i'm also into thermal imaging for years, and i did not expect to see a device in this price-range so soon...

regarding the temps on 1.6:
so there must be something strange going on, because i also think that this is something they SHOULD notice during testing!

can someone else beside Yushir0 report this problem as well?

edit: seems you are right that is has something to do with emissivity: now i'm again on 1.6 and there is NO MORE OPTION TO ADJUST EMISSIVITY!!!

how can they miss that (to have no option could be intentionally, because a change from skin to granite didn't change anything at 1.4.2 temperature wise) at QC??

Mudd:
Yes,
Same problems ,temp way off,my coffee was about 86 degrees celsius and personally,I don't see an improvement in gradient issue..

frenky:

--- Quote from: miguelvp on November 27, 2014, 02:24:31 am ---I took my Seek to the optometrist (my ZnSe 4" Focal length lens showed up today).
And my seek can read the label in my router. Edit: (The red Z doesn't show neither does a big red V over the whole verizon logo) the letters showing are white/silver and they probably dissipate heat quicker.

--- End quote ---
Hi.

Could you please tell me the algorithm for getting this great images?
I'm in the process of making software for fine tuning the processed image.
I'm pretty sure the algorithm is not just: sensor - calibration + 16384 because the vertical lines are still very visible...

Tnx.

eneuro:

--- Quote from: MLutz on November 27, 2014, 11:07:21 am ---now i'm again on 1.6 and there is NO MORE OPTION TO ADJUST EMISSIVITY!!!
..
how can they miss that (to have no option could be intentionally, because a change from skin to granite didn't change anything at 1.4.2 temperature wise) at QC??

--- End quote ---
It could be interesting to put on glass plate (table) a few objects with different emissivity like very low for aluminium foil , black plastic stuff, wood, etc, let it settle at constant ambient room temperature for longer time, measure this ambient temperature and than record this thermal objects scene quickly starting from lets say 2m distance to closer eg. up to 0.2m (20cm) at different angles around those things.
They should have room temperature if avoided reflections and human IR source, I guess, so looking what Seek app in old version 1.4.x and "latest" 1.6.0 will record could be very interesting.
BTW: Skin emissivity is about 0.99  according to this table: http://www.optotherm.com/emiss-table.htm
Polished aluminium 0.05-0.1 only, etc...

Edit: Changes made in new Seek apk release 1.6.0 in its libSeekware library used by java below:

--- Code: ---$ diff libSeekware-1.4.0.2.so.nm.txt libSeekware-1.6.0.so.nm.txt
49a50,52
> aslpf_deinit
> aslpf_init
> aslpf_process
154a158,160
> gradient_deinit
> gradient_init
> gradient_process
249a256
> retrieve_bplut
266a274
> tDiodeCount
325d332
< _Z16median5x_processPtS_ii

--- End code ---
As we can see added gradient_* functions and aslpf_* and  retrieve_bplut and a few other.
Versions v7a of libSeekware.so have the same functions exported but a few differences in internal math calcs etc, but exported symbols the same  :)

frenky:
I have finally received my SeekThermal. :-+

In the meantime I've made an app to fine tune raw file conversions. (App screenshot in the attachment)
So far I'm not near the results that Miguel is getting but it's a progress...

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