2017年7月14日 星期五
[OpenCV] OCR
sudo apt-get install tesseract-ocr
sudo pip install pytesseract
http://vmtram.blogspot.tw/2017/05/recognize-text-from-image-with-python.html
https://zhuanlan.zhihu.com/p/20844354
http://www.cnblogs.com/zhongtang/p/5560361.html
2017年7月13日 星期四
[RPi] GY-801
馬上會用到, 筆記一下, 要修改 import 和 i2c address
https://github.com/peterjc/longsight/blob/master/gy80.py
https://github.com/bitify/raspi/tree/master/i2c-sensors/bitify/python/sensors
https://github.com/bitify/raspi/tree/master/i2c-sensors/bitify/python/utils
http://astrobeano.blogspot.tw/2014/01/gy-80-orientation-sensor-on-raspberry-pi.html
不過有些數值好像還沒讀到？
Gyroscope/Accl/Comp q (nan, nan, nan, nan), yaw nan, pitch nan, roll nan (degrees)
Gyro-only quaternion (nan, nan, nan, nan), yaw nan, pitch nan, roll nan (degrees)
Accel/Comp quaternion (0.03, 0.16, 0.99, 0.00), yaw 161.5, pitch 3.54, roll 179.1 (degrees)
https://github.com/peterjc/longsight/blob/master/gy80.py
https://github.com/bitify/raspi/tree/master/i2c-sensors/bitify/python/sensors
https://github.com/bitify/raspi/tree/master/i2c-sensors/bitify/python/utils
http://astrobeano.blogspot.tw/2014/01/gy-80-orientation-sensor-on-raspberry-pi.html
不過有些數值好像還沒讀到？
Gyroscope/Accl/Comp q (nan, nan, nan, nan), yaw nan, pitch nan, roll nan (degrees)
Gyro-only quaternion (nan, nan, nan, nan), yaw nan, pitch nan, roll nan (degrees)
Accel/Comp quaternion (0.03, 0.16, 0.99, 0.00), yaw 161.5, pitch 3.54, roll 179.1 (degrees)
2017年7月12日 星期三
[RPi] Flir Lepton
GetLab
https://groupgets.com/manufacturers/getlab
FLiR Dev Kit
https://www.sparkfun.com/products/13233
FLIR Lepton Hookup Guide
https://learn.sparkfun.com/tutorials/flir-lepton-hookup-guide
How to install FLIR Lepton Thermal Camera and applications on Raspberry Pi
http://www.appropedia.org/How_to_install_FLIR_Lepton_Thermal_Camera_and_applications_on_Raspberry_Pi
Lepton
http://www.pureengineering.com/projects/lepton
Flir Lepton Thermal Imaging Sensor + Gameduino 2
http://www.theresistornetwork.com/2014/11/flir-lepton-thermal-imaging-sensor.html
Pylepton Overlay Guide 2.0 for Raspbian Pixel
https://lepton.flir.com/forums/topic/pylepton-overlay-guide-2-0-for-raspbian-pixel/
https://groupgets.com/manufacturers/getlab
FLiR Dev Kit
https://www.sparkfun.com/products/13233
FLIR Lepton Hookup Guide
https://learn.sparkfun.com/tutorials/flir-lepton-hookup-guide
How to install FLIR Lepton Thermal Camera and applications on Raspberry Pi
http://www.appropedia.org/How_to_install_FLIR_Lepton_Thermal_Camera_and_applications_on_Raspberry_Pi
Lepton
http://www.pureengineering.com/projects/lepton
Flir Lepton Thermal Imaging Sensor + Gameduino 2
http://www.theresistornetwork.com/2014/11/flir-lepton-thermal-imaging-sensor.html
Pylepton Overlay Guide 2.0 for Raspbian Pixel
https://lepton.flir.com/forums/topic/pylepton-overlay-guide-2-0-for-raspbian-pixel/
2017年7月11日 星期二
2017年7月10日 星期一
[RPi] How to speed up X11 forwarding in SSH
還沒有明顯的差距, 但先紀錄一下幾個方法或是方向應該是有用的
1. 超頻
force_turbo=1
2. 關掉 X-Server
3. 用比較簡單的 cipher
ssh -X -c arcfour pi@192.168.2.2
需要先安裝 libgcrypt20-dev
並且修改 /etc/ssh/sshd_config
ciphers arcfour,blowfish-cbc
4. 壓縮(或是不壓縮) ==> 眾說紛紜
不過實際測試, 壓縮比較悲劇
參考資料:
* http://xmodulo.com/how-to-speed-up-x11-forwarding-in-ssh.html
* https://serverfault.com/questions/116875/how-can-i-disable-encryption-on-openssh
* https://www.devolve.net/blog/2014/03/27/raspberry-pi-ssh-cipher-speed/
1. 超頻
force_turbo=1
2. 關掉 X-Server
3. 用比較簡單的 cipher
ssh -X -c arcfour pi@192.168.2.2
需要先安裝 libgcrypt20-dev
並且修改 /etc/ssh/sshd_config
ciphers arcfour,blowfish-cbc
4. 壓縮(或是不壓縮) ==> 眾說紛紜
不過實際測試, 壓縮比較悲劇
參考資料:
* http://xmodulo.com/how-to-speed-up-x11-forwarding-in-ssh.html
* https://serverfault.com/questions/116875/how-can-i-disable-encryption-on-openssh
* https://www.devolve.net/blog/2014/03/27/raspberry-pi-ssh-cipher-speed/
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