Differences

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--- thermalsensors [2020/11/07 21:16] – wf68spef
+++ thermalsensors [2021/02/02 16:10] (current) – wf68spef
@@ Line 1: / Line 1: @@
 ====== Thermal sensors ======
+===== Comparison of cameras =====
+https://github.com/OpenHD/Open.HD/wiki/Thermal-Cameras
 ===== Talk with acalbi sales engineer =====
@@ Line 104: / Line 108: @@
  * https://www.thingiverse.com/thing:2581533
+===== HTI =====
+  * HT-201 / HT-301
+  * 320x240 pixel
+  * 32° Opening angle
+  * https://www.amazon.de/Thermal-Infrarot-W%C3%A4rmebildkamera-Mobiltelefone-Aufl%C3%B6sung/dp/B07Y4PJF2S/ref=sr_1_1?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=ht-201+thermal&qid=1607201370&sr=8-1
 ===== Seek compact =====
@@ Line 246: / Line 257: @@
 ===== Calibration =====
-* Flat Field calibration
+  * Images of water are more cold at center than edges
-  * Build avg frame over multiple frames and save flat_field_calib
+    * Due to vignetting
-  * frame_corrected = frame_raw - flat_field_calib
+    * https://en.wikipedia.org/wiki/Vignetting
-  * Implementation https://github.com/OpenThermal/libseek-thermal/blob/master/src/SeekCam.cpp#L101
+  * Flat field calibration
+    * Build avg frame over multiple frames and save flat_field_calib
+    * frame_corrected = frame_raw - flat_field_calib
+    * Implementation https://github.com/OpenThermal/libseek-thermal/blob/master/src/SeekCam.cpp#L101