Cool, looking forward to its release.
Thanks,
G
Search found 86 matches
- Tue Nov 24, 2020 11:52 am
- Forum: General Topics
- Topic: OpenMV PureThermal Board
- Replies: 2
- Views: 110
- Tue Nov 24, 2020 5:22 am
- Forum: General Topics
- Topic: OpenMV PureThermal Board
- Replies: 2
- Views: 110
OpenMV PureThermal Board
Hi,
I know the board isn't even released yet but I'm just wondering if you intend on including a feature like Flir MSX on this board given that you have both camera outputs to improve the visual quality of the thermal image?
Also what are the dimensions of the board?
Thanks,
G
I know the board isn't even released yet but I'm just wondering if you intend on including a feature like Flir MSX on this board given that you have both camera outputs to improve the visual quality of the thermal image?
Also what are the dimensions of the board?
Thanks,
G
- Fri Nov 20, 2020 5:02 pm
- Forum: Technical Discussion
- Topic: USB VCP Acces denied with pySerial
- Replies: 6
- Views: 128
Re: USB VCP Acces denied with pySerial
Hi, No, you do not need micro python installed on your computer. Micro python is just a lite version of python specifically for use on microcontrollers like the OpenMV products for example. When you save your IDE code as main.py on the OpenMV H7 you need to disconnect the camera from the IDE. I norm...
- Fri Nov 20, 2020 4:16 pm
- Forum: Technical Discussion
- Topic: USB VCP Acces denied with pySerial
- Replies: 6
- Views: 128
Re: USB VCP Acces denied with pySerial
Hi, Yes if you have the IDE open and connected to the camera then you will get an error with the com port as its already in use. Saving your IDE Code to main.py on the openmv H7 and disconnecting the device from the ide should resolve the problem. Then run the code you have labelled as main on your ...
- Wed Nov 18, 2020 3:00 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub (and anyone else interested in improving radiometric output), I have some preliminary results using the two blackbodies in the field of view to improve temperature readings in the 20 to 40 degree temperature range. I have performed various experiments to get to this stage. The test I used to...
- Fri Nov 13, 2020 5:27 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Ok. I'm only using two heating pads on some 2mm steel thats 100mm x 100mm in size. Im using this power supply https://thepihut.com/products/arduino-universal-power-supply-9v-2a to power everything which seems to work quite well. I may need to add a 5v pwm fan to the 20 degree blackbody for its event...
- Thu Nov 12, 2020 10:04 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, I got my blackbodies working eventually. I initially tried implementing a pid controller approach which sort of worked but not well enough. So I basically done what you said with the different pwm and set points etc. I currently power the the Arduino with 9v through the power jack. I'm powe...
- Mon Nov 09, 2020 1:44 pm
- Forum: General Topics
- Topic: flir lepton 3.5
- Replies: 5
- Views: 161
Re: flir lepton 3.5
Try DigiKey, they have loads in stock according to their website
- Fri Nov 06, 2020 3:03 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub,
I've another quick question if thats alright, how did you mount the heating pad to the sheet of steel, did you glue it to it or something as basic as that?
Thanks,
G
I've another quick question if thats alright, how did you mount the heating pad to the sheet of steel, did you glue it to it or something as basic as that?
Thanks,
G
- Wed Nov 04, 2020 10:37 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, In terms of your blackbody heating algorithm did you take the approach of providing current to the heating pad if the temperature is not at the set point and then turn off when the temperature is at the set point or did you go much more robust in your approach. Again I was thinking of apply...
- Wed Oct 21, 2020 6:10 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Thats great, thanks for the help.
G
G
- Wed Oct 21, 2020 5:57 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Out of interest have you checked to see how uniform the heat distribution is on the plate? Or do the three of those heating pads completely cover the back of the plate to mitigate that issue?
- Wed Oct 21, 2020 5:48 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, Apologies for the endless stream of questions, can I ask what sort of a heater element are you using? Is it a cartridge heater or some form of a ptc heating element which seem to be the more power efficient option. I had initially thought of using a cartridge heater but a ptc heating elemen...
- Tue Oct 20, 2020 12:14 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Yes I think I see where your coming from now...the 20 degree blackbody may need to be cooled as opposed to heated if the ambient temperature is too high. Another thing to think about!
Thanks,
G
Thanks,
G
- Tue Oct 20, 2020 10:27 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi, The ambient temperature of the scene will probably fluctuate around 25 - 30 degrees for the most part but the outer limits are 20 and 40. Given space constraints both blackbodies would be relatively close together. But to answer your question no the ambient temperature wouldn't/shouldn't be less...
- Tue Oct 20, 2020 9:58 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub,
Another quick question for you, do you know what the power draw/usage is for the blackbody your using?
Kind regards,
G
Another quick question for you, do you know what the power draw/usage is for the blackbody your using?
Kind regards,
G
- Mon Oct 19, 2020 7:08 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi,
I'll definitely let you know if it works/if I get a chance to do it.
Thanks,
G
I'll definitely let you know if it works/if I get a chance to do it.
Thanks,
G
- Mon Oct 19, 2020 6:50 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, Apologies, I have another question, what thickness is the steel you are using, you mentioned on your website it takes roughly 10 minutes for the temperature to stabilise. I'm not sure what way your blackbody works but I'm thinking of using a PID controller along with the SSR, a couple of ca...
- Mon Oct 19, 2020 4:34 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, Thanks for your help. I'm going to try create a blackbody myself as opposed to my current approach of improving temperature accuracy which was to alter the flux linear parameters on the Lepton and generate a calibration function which compared the output of the camera looking down at a cont...
- Sun Oct 18, 2020 8:15 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, In terms of the blackbody itself, are you using a solid state relay to control the constant temperature? What material are you using for the surface out of interest, I know most metallic surfaces can be made into good emitters using paints. I was actually thinking of having two black body s...
- Sat Oct 17, 2020 6:26 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, I appreciate your help on this matter. Do you basically use the following logic and say if the colour thresholds representing the blackbody @ 37.8 degrees is greater than the colour threshold of somebodies face then they do nothing otherwise trigger an alarm? In my case I am not doing eleva...
- Sat Oct 17, 2020 2:54 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub,
So your using the blackbody as a reference point within the image or am I wrong in saying that?
Did you manufacture the blackbody yourself, if so can you elaborate on that process?
Thanks,
G
So your using the blackbody as a reference point within the image or am I wrong in saying that?
Did you manufacture the blackbody yourself, if so can you elaborate on that process?
Thanks,
G
- Sat Oct 17, 2020 5:45 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi Stub, You mentioned that you had developed a low cost blackbody. I have designed and built a low cost black body - if you need one to help with this process please let me know. I was wondering if you could elaborate on that? Have you used it to calibrate a Lepton 3.5 and if so what sort of measur...
- Thu Oct 15, 2020 4:40 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi kwagyeman
Just curious if theres any update on this
Thanks
G
Just curious if theres any update on this
Regarding the 14-bit data any. I has a todo list task to support the FLIR Lepton in the FIR module. When this is done you will be able to get the 14-bit image. However, don't expect this for a few months.
Thanks
G
- Fri Sep 25, 2020 4:18 am
- Forum: Technical Discussion
- Topic: Lepton FFC Mode
- Replies: 1
- Views: 119
Lepton FFC Mode
Hi, Im just wondering if you can help me read/interpret the FFC settings from section 4.5.16 https://www.flir.com/globalassets/imported-assets/document/flir-lepton-software-interface-description-document.pdf. I want to get the current settings and print them but I seem to be getting unusual values. ...
- Mon Sep 07, 2020 8:51 am
- Forum: General Topics
- Topic: Extracting the pixel value of the image
- Replies: 10
- Views: 420
Re: Extracting the pixel value of the image
Hi, I think Nyamekye already answered this you cant index like that, python doesn't know what structure your trying to use. If you want to use a list you need to define it as mylist = [] for example before you use it. Then you can Insert a value into a certain index position of the list using the fo...
- Fri Aug 28, 2020 1:31 pm
- Forum: Technical Discussion
- Topic: Stream Images From Lepton 3.5 To Host
- Replies: 2
- Views: 164
Re: Stream Images From Lepton 3.5 To Host
Thank you.
- Fri Aug 28, 2020 5:30 am
- Forum: Technical Discussion
- Topic: Stream Images From Lepton 3.5 To Host
- Replies: 2
- Views: 164
Stream Images From Lepton 3.5 To Host
Hi, I'm just wondering if its possible to stream thermal images from the OpenMV H7 + Flir Lepton 3.5 to my host which is a raspberry pi. Can the openmv stream/push the images to the host device via usb without the need for the raspberry pi needing to request the openmv board to take a snapshot. The ...
- Fri Jul 31, 2020 2:12 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Yeah no problem. I won't get to it immediately as I have a few other features to develop first but when I eventually get it done I'll post the code. Thanks
- Fri Jul 31, 2020 6:40 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi, Possibly a foolish question but do you think there is any reason why the openmv board couldn't be used to calibrate the lepton 3.5 as per the Flir guide https://www.flir.com/globalassets/imported-assets/document/lepton-with-radiometry-quickstart-guide.pdf . I know it mentions communicating with ...
- Thu Jul 30, 2020 6:41 am
- Forum: Technical Discussion
- Topic: Temperature value of each pixel captured by LEPTON
- Replies: 39
- Views: 4586
Re: Temperature value of each pixel captured by LEPTON
Hi, I thought this might be useful if someone like me wants the raw data or the reassurance that the 8 bit conversion the OpenMV board does is still quite accurate. I done two comparisons. The top comparison uses the Flir radiometric ROI SDK function to return the average temperature in Kelvin scale...
- Tue Jul 28, 2020 3:45 pm
- Forum: Technical Discussion
- Topic: Send array of values
- Replies: 3
- Views: 155
Re: Send array of values
Given that my array is full of 16 bit data I tried packaging it as .pgm file but when reading on the host device it see's them as 8 bit values for some reason.
- Tue Jul 28, 2020 7:58 am
- Forum: Technical Discussion
- Topic: Unable to connect to your OpenMV cams normal bootloader
- Replies: 2
- Views: 141
Re: Unable to connect to your OpenMV cams normal bootloader
Hi,
Just to let you know I got this working using the shared folders approach as per your documentation. The one thing I did notice is when I run the boot loader to update the firmware the Cam has to be disconnected from the ide before I try do it which I never noticed before.
Just to let you know I got this working using the shared folders approach as per your documentation. The one thing I did notice is when I run the boot loader to update the firmware the Cam has to be disconnected from the ide before I try do it which I never noticed before.
- Tue Jul 28, 2020 7:41 am
- Forum: Technical Discussion
- Topic: Send array of values
- Replies: 3
- Views: 155
Send array of values
Hi, How do i send an array of values to a raspberry pi as opposed to an image object? I have it working for an image object its more how do I package the array. So I have my "img" which is actually an array of 16 bit values but I am not entirely sure how I send those back to the host device. I store...
- Fri Jul 24, 2020 5:56 am
- Forum: Technical Discussion
- Topic: Temperature value of each pixel captured by LEPTON
- Replies: 39
- Views: 4586
Re: Temperature value of each pixel captured by LEPTON
Hi, Just to let you know, and for anyone else that may need it, I got the spotmeter stuff working. There were two things happening. I had to put a time.sleep(500) between the setting of the ROI and the getting of the ROI to allow the changes to take effect. The other thing I wanted was to set the RO...
- Fri Jul 24, 2020 4:42 am
- Forum: Technical Discussion
- Topic: Unable to connect to your OpenMV cams normal bootloader
- Replies: 2
- Views: 141
Unable to connect to your OpenMV cams normal bootloader
Hi, I'm trying to upload some firmware changes on the H7. I have done this several times before and it has worked fine. The only difference now is im trying to do it on a virtual machine, specifically on Ubuntu 14.04 (Guest OS) with the host OS being Windows 10. When I go to run the bootloader and t...
- Thu Jul 23, 2020 4:43 pm
- Forum: Technical Discussion
- Topic: Temperature value of each pixel captured by LEPTON
- Replies: 39
- Views: 4586
Re: Temperature value of each pixel captured by LEPTON
Yes I'll have a look. I also agree that the Flir documentation is quite poor given the complexity of the subject matter. Thank you.
- Thu Jul 23, 2020 11:42 am
- Forum: Technical Discussion
- Topic: Temperature value of each pixel captured by LEPTON
- Replies: 39
- Views: 4586
Re: Temperature value of each pixel captured by LEPTON
Hi,
I have the 3.5. I can set the coordinates and get the coordinates to make sure they are set to mine but when I query the ROI for min, max, avg temp and population it seems to be based off of other coordinates as far as I can see.
I have the 3.5. I can set the coordinates and get the coordinates to make sure they are set to mine but when I query the ROI for min, max, avg temp and population it seems to be based off of other coordinates as far as I can see.
- Thu Jul 23, 2020 10:18 am
- Forum: Technical Discussion
- Topic: Temperature value of each pixel captured by LEPTON
- Replies: 39
- Views: 4586
Re: Temperature value of each pixel captured by LEPTON
Hi, When I issue the rad spot-o-meter set command with the following values I get a sensor control failed error. The code I use is: roi = struct.pack("<HHHH", 0,0,159,119) # defining rectangle coordinates and putting in structure sensor.ioctl(sensor.IOCTL_LEPTON_SET_ATTRIBUTE, 0x4ECD, roi) data = se...
- Thu Jul 23, 2020 9:15 am
- Forum: Technical Discussion
- Topic: Image Indexing
- Replies: 1
- Views: 104
Image Indexing
Hi,
When you have an image object and you index into it to get a pixel value, where is the source code that executes that operation out of interest?
When you have an image object and you index into it
Code: Select all
img[0]
- Wed Jul 22, 2020 9:17 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi, I completely misread one of your earlier responses in this thread which is why I got so confused. You said in non measurement mode the sensor runs an algorithm called AGC which adaptively scales the 14-bits to 8-bits using a method that changes per area of the image . I have since looked at the ...
- Tue Jul 21, 2020 2:21 pm
- Forum: Technical Discussion
- Topic: Built in self test
- Replies: 2
- Views: 128
Re: Built in self test
Hi,
Yes thats fine once i have the use of the print statement I will probably figure it out myself. Cheers.
Yes thats fine once i have the use of the print statement I will probably figure it out myself. Cheers.
- Tue Jul 21, 2020 4:55 am
- Forum: Technical Discussion
- Topic: Built in self test
- Replies: 2
- Views: 128
Built in self test
Hi,
I have made changes to the firmware and uploaded them onto the H7. The camera seems to be stuck on the self test I see no blue light flashing? How long should it take?. Also is it possible to see the output of print statements in the firmware for debugging purposes.
I have made changes to the firmware and uploaded them onto the H7. The camera seems to be stuck on the self test I see no blue light flashing? How long should it take?. Also is it possible to see the output of print statements in the firmware for debugging purposes.
- Mon Jul 20, 2020 4:11 pm
- Forum: Technical Discussion
- Topic: Temperature value of each pixel captured by LEPTON
- Replies: 39
- Views: 4586
Re: Temperature value of each pixel captured by LEPTON
Hi Iseeinir23, I'm definitely not an expert but it sounds like you need to calibrate the lepton off a black body source. The camera should be doing FFC automatically so the core temperature of the camera shouldn't be an issue. The lepton is calibrated at factory for a scence with 100% emissivity in ...
- Wed Jul 15, 2020 8:34 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi, I would like to summarise my understanding of this code and see If you can tell me whether I am on the right lines or not: int value = __REV16(row_ptr[fast_floorf(x * scale_inv)]); if (measurement_mode) { // Need to convert 14/16-bits to 8-bits ourselves... if (!radiometry) value = (value - 8192...
- Tue Jul 14, 2020 6:54 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi, So I had the temperature settings set at -10 and 140 which by my calculations would result in a possible loss of precision of approximately 0.58C in an 8 bit greyscale image, is that correct? I didn't intend on leaving the temperature window that wide going forward anyway but I didn't realise it...
- Mon Jul 13, 2020 2:58 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Yes maybe your right, I'm just trying to understand it which the source code definitely helped with. The critical temperature range is 20 to 40 degrees, you wouldn't really want a server reaching 40 degrees anyway.
- Mon Jul 13, 2020 1:18 pm
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Yes I saw it. The spot meter requires me to give it the coordinates of an area I want to check. In terms of a server rack I cant say the hotspot will always be at a specifc point, hence why I wanted the raw data as well as an 8 bit greyscale image. We would then implement our own hotspot detection c...
- Mon Jul 13, 2020 11:25 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi I would like to access the raw temperature data the camera produces I understand that I would still need to convert it to 8 bit or whatever for display purposes. So in short I would like to have an array of raw temperature values and the 8 bit greyscale image. I understand what you mean about con...
- Mon Jul 13, 2020 6:43 am
- Forum: Technical Discussion
- Topic: Radiometric vs Non-Radiometric Leptons
- Replies: 64
- Views: 2495
Re: Radiometric vs Non-Radiometric Leptons
Hi, Is the logical AND of value and 0xff in the switch statement where the 14 bit to 8 bit conversion is actually happening. I had a quick look at the code and specifically looked up the 0xff operator which gives you the last 8 bits of the value. The code I'm looking at is here: IMAGE_PUT_GRAYSCALE_...