Author Topic: Yet another cheap thermal imager incoming.. Seek Thermal (Read 1023307 times)

Fraser · « **Reply #1350 on:** January 04, 2015, 11:04:11 pm »

For anyone interested in thermal calibration references (Black Bodies) I have uploaded some pictures of the inside of an IsoTech plate radiator Black Body here:

https://www.eevblog.com/forum/testgear/thermal-camera-black-body-calibration-check-source-inside-the-isotech-988/msg580476/#msg580476

Aurora

Stoffel Janssens · « **Reply #1351 on:** January 06, 2015, 01:17:52 am »

Just an idea:
I don't know how this vanadium oxide is deposited but during thin film deposition, there could be a gradient in the thickness of the deposited film. Maybe this is what people are seeing here. This is not silicon technology.

Lurchbox · « **Reply #1352 on:** January 06, 2015, 09:32:56 pm »

Is anyone else having issues with the seek on Nexus 7 (2013) It takes snapshots fine but does not show live preview. Same with the usb extension and without.

Fraser · « **Reply #1353 on:** January 06, 2015, 09:45:04 pm »

Unless SEEK Thermal can sort out the niggles with the SEEK quickly, I fear we may be seeing the beginning of the end for this product. See here:

https://www.eevblog.com/forum/testgear/new-flir-products/msg580928/#msg580928

As I state in that thread, many people will judge a thermal camera by how nice the images appear and the FLIR LEPTON produces 'nicer' images with MSX added for 'detail'. For $250 I can see customers moving to FLIR for their phone thermal cameras.

I am even tempted, in spite of the 80x60 thermal resolution !

SEEK Thermal need to act fast or accept the sad possibility that they will fade into obscurity in the shadow of the new FLIR offerings.

Aurora

Lurchbox · « **Reply #1354 on:** January 06, 2015, 10:38:15 pm »

I imagine MSX like features could be added to the seek using another camera especially due to most phones having 5mp+ sensors. Also the windows tablet i use with the seek has its optical camera right next to it. MSX tech to me appears to just be edge detection and overlay two images.

Seeker · « **Reply #1355 on:** January 06, 2015, 10:44:44 pm »

Well let's hope the new FLIR spurs SeeK to get their act together, and/or release the SDK.

mikeselectricstuff · « **Reply #1356 on:** January 06, 2015, 10:48:19 pm »

Quote from: Lurchbox on January 06, 2015, 10:38:15 pm

I imagine MSX like features could be added to the seek using another camera especially due to most phones having 5mp+ sensors. Also the windows tablet with the seek has its optical camera right next to it. MSX tech to me appears to just be edge detection and overlay two images.

It's not that simple - different phones will have different sensor positions and fields of view, the camera-to-imager distances will usually be a lot higher.
And Flir has a patent on MSX, though you could probably use a different algorithm to achieve a similar effect

Lurchbox · « **Reply #1357 on:** January 06, 2015, 11:18:34 pm »

I wonder if a macro lens on a phone/tablet camera would work, i don't know if this would give a similar field of view
http://www.ebay.com/itm/NEW-SEEK-THERMAL-Macro-Lens-CAMERA-IMAGING-ANDROID-FLIR-LWIR-NIGHT-VISION-/191472618216?pt=US_Other_Cell_Phone_Accessories&hash=item2c94a84ae8

Lurchbox · « **Reply #1358 on:** January 07, 2015, 02:59:46 am »

Heres some more pics taken from seeker.exe
leak.jpg is a pic of my friends custom exhaust job lol. radiator is of the coolant line, and ex is of the rear exhaust

Lurchbox · « **Reply #1359 on:** January 07, 2015, 03:09:47 am »

heres some from my the native seek app.

Uho · « **Reply #1360 on:** January 07, 2015, 09:18:01 am »

Lurchbox
Please photo flat surface. I want to see the gradient. Maybe your Seek has a smaller gradient.

Seeker · « **Reply #1361 on:** January 07, 2015, 12:13:05 pm »

I have yet to hear that all SeeK's are afflicted with a gradient. There may be a lot of consumer owners out there who haven't heard of the gradient issue because theirs works great. So would have no reason to say (in any arena) "mine's fine and flat". So owners of afflicted units may be under the false impression that it's a design fault rather than an occasional QC (lens alignment?) issue....?
Be very interesting to hear MikeStuff's findings when he receives his two other* SeeK's for comparison.

*mentioned in gradient video

Uho · « **Reply #1362 on:** January 07, 2015, 12:24:13 pm »

Align the lens does not helps. You can reduce the gradient. When heated, the gradient increases. My order 19xxx. He's not the first place. I still ask my friends. They should get it. You need to collect statistics.

z01z · « **Reply #1363 on:** January 07, 2015, 01:33:37 pm »

Mine stats with no gradient, 4-5 deg after 1 min, 6-7 deg after 10 min. The upper half of the image is affected.
Order #17xxx, hw version 0.0.0.5.

-jeffB · « **Reply #1364 on:** January 07, 2015, 02:03:32 pm »

Quote from: Uho on January 07, 2015, 09:18:01 am

Lurchbox
Please photo flat surface. I want to see the gradient. Maybe your Seek has a smaller gradient.

All those photos cover a wide range of temperatures, much wider than the typical gradient, so that would minimize the gradient's appearance.

Seeker · « **Reply #1365 on:** January 07, 2015, 05:18:10 pm »

@Uho,
statistics yes. It's still to be explained how MikeStuff concluded (with proof video experiments) that it is alignment, and unit temperature is not a factor.
Not to say anyone's wrong, it's that there are still conflicting opinions. The facts seem to be that in some units the temp does affect the gradient, and others not...? It's all conflicting at the moment, apparently.

Uho · « **Reply #1366 on:** January 07, 2015, 05:57:35 pm »

I thought that almost removed the gradient. When pushed the tube. Electronic board warmed and it has increased. The first seconds of no gradient. Maybe other people do not have this problem. Need statistics to understand the patterns.

Lurchbox · « **Reply #1367 on:** January 07, 2015, 06:37:10 pm »

Quote from: Uho on January 07, 2015, 09:18:01 am

Lurchbox
Please photo flat surface. I want to see the gradient. Maybe your Seek has a smaller gradient.

Heres a few shots from my coffee maker, and shots from the black insulated hot pad it was sitting on.

Lurchbox · « **Reply #1368 on:** January 07, 2015, 06:39:12 pm »

Quote from: -jeffB on January 07, 2015, 02:03:32 pm

Quote from: Uho on January 07, 2015, 09:18:01 am
Lurchbox
Please photo flat surface. I want to see the gradient. Maybe your Seek has a smaller gradient.

All those photos cover a wide range of temperatures, much wider than the typical gradient, so that would minimize the gradient's appearance.

Do you have any suggested temps I can try it with?

Uho · « **Reply #1369 on:** January 07, 2015, 06:53:37 pm »

The first and third screenshot is a gradient?

Seeker · « **Reply #1370 on:** January 07, 2015, 06:57:06 pm »

I'd try for uniform rather a particular temp, Lurchbox. I'd try an internal wall (painted matt) or door...or something else dense, homogenous, flat and stabilised enough.

Uho, I think that's just the pad hotspot from the coffee maker.

Lurchbox · « **Reply #1371 on:** January 07, 2015, 07:03:26 pm »

Quote from: Seeker on January 07, 2015, 06:57:06 pm

I'd try for uniform rather a particular temp, Lurchbox. I'd try an internal wall (painted matt) or door...or something else dense, homogenous, flat and stabilised enough.

Uho, I think that's just the pad hotspot from the coffee maker.

ll get a shot of the door in a sec

found an interesting project on github
https://github.com/Kaushu/RubADubDub

does this code mean that his program can display temps?

ImageDisplayer.java
Last indexed 5 days ago

83     while(fromFile.hasNext())
84     {
85     String temp = fromFile.nextLine();
86     int x = Integer.parseInt(temp.substring(0,temp.indexOf(",")));
…
86     int x = Integer.parseInt(temp.substring(0,temp.indexOf(",")));
87     int y = Integer.parseInt(temp.substring(temp.indexOf(",")+1,

Uho · « **Reply #1372 on:** January 07, 2015, 07:09:52 pm »

Picture my flat surface do Seek.

Lurchbox · « **Reply #1373 on:** January 07, 2015, 07:12:17 pm »

Heres a couple of a door and my laptop bag

Lurchbox · « **Reply #1374 on:** January 07, 2015, 07:14:10 pm »

the door with the windows is white, the one with the handle is green so I'm not sure if it would reflect the imager


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Author Topic: Yet another cheap thermal imager incoming.. Seek Thermal (Read 1023307 times)

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