Displaying temperature from Boson sensor with RT1062?

jimbo · January 25, 2026, 9:47pm

I am wondering if it is possible to convert the pixel values from a csi.snapshot() actual temperature values and display as the blob temperature etc…. I am using a radiometric Boson 640 with a RT1062. the Boson pixformat seems to be only GRAYSCALE (8bit) so, I am not sure if it is possible. I have looked through the examples etc and cannot find anything related to the Boson, there are some promising hints in the Lepton examples though. Rather than re-inventing any wheels, I thought I would ask first Thank you.

kwagyeman · January 26, 2026, 2:17am

Hi, for the FLIR Boson at the moment, no.

Most FLIR Bosons don’t support outputting 14-bit IR readings over an 8-bit data bus. I looked into this and it appears that this may only work with the FLIR Boson+. Older units don’t have the functionality. The API we are using appears to have the functionality, but, on all the FLIR Bosons I tried they did not update their output to mux 14-bit IR data over two clock cycles on an 8-bit data bus.

However, you can use the spot-o-meter functionality with them. You’ll need to modify the C code and add an ioctl for this, but, with the spot-o-meter, you specify a ROI (x, y, w, h) and then the FLIR Boson gives you the temperature average of all values in that ROI.

github.com/openmv/openmv

drivers/boson/include/Client_API.h

master


      
          FLR_RESULT spnrGetAlgorithm(FLR_SPNR_ALGORITHM_E *data);
          FLR_RESULT spnrSetAlgorithmDesired(const FLR_SPNR_ALGORITHM_E data);
          FLR_RESULT spnrGetAlgorithmDesired(FLR_SPNR_ALGORITHM_E *data);
          FLR_RESULT spnrSetDFFast(const float dffast);
          FLR_RESULT spnrGetDFFast(float *dffast);
          FLR_RESULT spnrSetDFSlow(const float dfslow);
          FLR_RESULT spnrGetDFSlow(float *dfslow);
          FLR_RESULT spnrSetSensitivityThreshold(const float threshold);
          FLR_RESULT spnrGetSensitivityThreshold(float *threshold);
          FLR_RESULT spnrSetReset(const FLR_SPNR_RESET_E resetType);
          FLR_RESULT spotMeterSetEnable(const FLR_ENABLE_E data);
          FLR_RESULT spotMeterGetEnable(FLR_ENABLE_E *data);
          FLR_RESULT spotMeterGetRoiMaxSize(uint16_t *width, uint16_t *height);
          FLR_RESULT spotMeterSetRoi(const FLR_ROI_T roi);
          FLR_RESULT spotMeterGetRoi(FLR_ROI_T *roi);
          FLR_RESULT spotMeterGetSpotStats(uint16_t *mean, uint16_t *deviation, FLR_SPOTMETER_SPOT_PARAM_T *min, FLR_SPOTMETER_SPOT_PARAM_T *max);
          FLR_RESULT spotMeterSetStatsMode(const FLR_SPOTMETER_STATS_TEMP_MODE_E mode);
          FLR_RESULT spotMeterGetStatsMode(FLR_SPOTMETER_STATS_TEMP_MODE_E *mode);
          FLR_RESULT spotMeterGetTempStats(float *mean, float *deviation, FLR_SPOTMETER_STAT_PARAM_TEMP_T *min, FLR_SPOTMETER_STAT_PARAM_TEMP_T *max);
          FLR_RESULT srnrSetEnableState(const FLR_ENABLE_E data);
          FLR_RESULT srnrGetEnableState(FLR_ENABLE_E *data);

jimbo · January 26, 2026, 10:14pm

Thank you @kwagyeman - this is helpful. However, for the time being, modifying the C code is a little out of my comfort zone so, I will stick to the GRAYSCALE / IRONBOW imagery and just go for hot spot detection. Thanks again I am enjoying the OpenMV gear (I think I need to get a couple N6s next).

kwagyeman · January 26, 2026, 10:33pm

This feature may be added to the API this year. Have some customers asking about it.

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Displaying temperature from Boson sensor with RT1062?

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