Closed weshao closed 4 years ago
That's very weird. For me the raw values are (e.g. ~30315 for room at ~30deg C). The values being in 8000 range imply that the data is indeed in GRAY16_LE 16-bit format.
I presume that the following:
!gst-launch-1.0 v4l2src device=/dev/video1 ! video/x-raw,format=GRAY16_LE ! videoconvert ! ximagesink
gives you very dark (near black) image?
Could you send me an example png file from get_ir_image()
so I can take a look?
You can use the following command to save a file:
!gst-launch-1.0 v4l2src device=/dev/video1 num-buffers=1 ! video/x-raw,format=GRAY16_LE ! videoconvert ! pngenc ! filesink location=/tmp/ir.png
It should be in /tmp/ir.png
gst-inspect-1.0 pngenc
@tomek-l Thanks for the reply. This is the running image:
2.The image
Factory Details:
Rank primary (256)
Long-name PNG image encoder
Klass Codec/Encoder/Image
Description Encode a video frame to a .png image
Author Jeremy SIMON <jsimon13@yahoo.fr>
Plugin Details:
Name png
Description PNG plugin library
Filename /usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstpng.so
Version 1.14.5
License LGPL
Source module gst-plugins-good
Source release date 2019-05-29
Binary package GStreamer Good Plugins (Ubuntu)
Origin URL https://launchpad.net/distros/ubuntu/+source/gst-plugins-good1.0
GObject
+----GInitiallyUnowned
+----GstObject
+----GstElement
+----GstVideoEncoder
+----GstPngEnc
Implemented Interfaces:
GstPreset
Pad Templates:
SINK template: 'sink'
Availability: Always
Capabilities:
video/x-raw
format: { (string)RGBA, (string)RGB, (string)GRAY8, (string)GRAY16_BE }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
SRC template: 'src'
Availability: Always
Capabilities:
image/png
width: [ 16, 1000000 ]
height: [ 16, 1000000 ]
framerate: [ 0/1, 2147483647/1 ]
Element has no clocking capabilities.
Element has no URI handling capabilities.
Pads:
SINK: 'sink'
Pad Template: 'sink'
SRC: 'src'
Pad Template: 'src'
Element Properties:
name : The name of the object
flags: readable, writable
String. Default: "pngenc0"
parent : The parent of the object
flags: readable, writable
Object of type "GstObject"
qos : Handle Quality-of-Service events from downstream
flags: readable, writable
Boolean. Default: false
snapshot : Send EOS after encoding a frame, useful for snapshots
flags: readable, writable
Boolean. Default: false
compression-level : PNG compression level
flags: readable, writable
Unsigned Integer. Range: 0 - 9 Default: 6
Hi @weshao Sorry it took me so long to get back to you! I couldn't figure it out, but I ran into a similar issue tonight on different hardware.
You're likely trying to use Lepton 3.0 (S/N: 500-0726-01), instead of Lepton 3.5 (S/N: 500-0771-01) module. They look the same and it's easy to get them confused.
Unfortunately, Lepton 3.0 doesn't support radiometry, which is required to obtain the temperature values.
Hi @tomek-l Yes, you are right, I checked and found that I am using Lepton 3.0. Thank you for your answer :)
Hi, I'm using Lepton 3.5 and purethermal 2, but my result temperature is around 100 (it should be close to 37,right?), and when I use the notebook(https://github.com/tomek-l/ai-thermometer/blob/master/docs/notebooks/Getting%20Started%20with%20Cameras.ipynb), the raw data for each pixel is around 8000 and after Kelvin to Celsius the result is around -195. Do you have any idea about this? Thanks.