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--- project:ar_sandbox:start [2016/12/08 23:37] – Power management ruza
+++ project:ar_sandbox:start [2019/07/23 18:17] – piskoviste^2 sachy
@@ Line 7: / Line 7: @@
 hw=-|
 founder=[[user:harvie]]|
-interested=[[user:stick]]\\ [[user:niekt0]]\\ [[user:pasky]]\\ [[user:nephirus]]\\ [[user:Gygal]]|
+interested=[[user:stick]]\\ [[user:niekt0]]\\ [[user:pasky]]\\ [[user:nephirus]]\\ [[user:Gygal]]\\[[user:sachy]]|
 status=active
 }}
 ~~META:
-status = active
+status = in restart process
 &relation firstimage = :project:sarndbox-foto_by_alef.jpg
 ~~
@@ Line 145: / Line 145: @@
   * 3x VIKA LERBERG Trestle - http://www.ikea.com/gb/en/catalog/products/80130776/
   * custom parts from OBI
+====== AR SandBox^2 ======
+The new software is based on Python + OpenCV + libfreenect to abadon that crappy software from the distant past and make hardware requirements as low as possible (lets convert from tower PC to raspberry).
+<code python piskoviste.py>
+#!/bin/python
+from freenect import sync_get_depth as gdepth
+import cv2
+import numpy as np
+def loopa():
+	global depth
+	while True:
+		(depth,_) = gdepth()
+		npd=np.array(depth)
+		mn=npd.min()
+		npd[npd>1000]=1000 # Eliminate kinect artefacts, constant to be fitted manually
+		#print(npd.max())
+		npd-=mn
+		mx=npd.max()
+		npd2=npd*(255/mx)
+		npd=np.floor(npd2).astype(np.uint8)
+# Debugging histrogram START
+#		himg=np.zeros((300,256,1))
+#		hst=cv2.calcHist([npd],[0],None,[256],[0,2048])
+#		cv2.normalize(hst,hst,0,255,cv2.NORM_MINMAX)
+#		hst2=np.int32(np.around(hst))
+#		pts=np.column_stack((np.arange(256).reshape(256,1),hst2))
+#		cv2.polylines(himg,[pts],False,(255,0,0))
+# Debugging histogram END
+		fdepth=cv2.applyColorMap(npd,cv2.COLORMAP_JET)
+		cv2.imshow('dpth',fdepth)
+		#cv2.imshow('hst',himg) # Debugging histogram
+		if cv2.waitKey(1) & 0xFF == ord('q'):
+			break
+loopa()
+cv2.destroyAllWindows()
+</code>
+===== Environment preparation =====
+Easiest way to do anything pyrelated without fighting incompatible python versions is to create virtual environment (venv).
+<code bash>
+apt-get install python3-venv python-opencv libusb-dev libusb-1.0.0-dev python3-dev
+mkdir ./piskoviste
+cd ./piskoviste
+wget "https://github.com/OpenKinect/archive/master.zip"
+unzip "./master.zip"
+python3 -m venv venv
+source ./venv/bin/activate
+pip install --upgrade pip
+pip install matplotlib
+pip install numpy
+pip install opencv-python
+pip install cython
+mkdir ./libfreenect-master/build
+cd ./libfreenect-master/build
+cmake -L .. -DBUILD_EXAMPLES=OFF -DBUILD_PYTHON3=ON
+make
+make install
+cd ../wrappers/python
+python ./setup.py install
+cd ../../..
+wget "piskoviste.py_Z_BRMLABI_WIKI"
+python ./piskoviste.py
+</code>
+===== Result =====
+{{:project:ar_sandbox:dpth.png?direct|}}
 ===== Similar Projects =====
@@ Line 155: / Line 235: @@
   * http://smartmania.cz/clanky/sandystation-interaktivni-piskoviste-s-vyuzitim-kinectu-video-1672
   * http://www.military.com/video/logistics-and-supplies/army-equipment/sandtable-as-fun-as-sanbox/3849414398001/
+more useful links
+  * http://idav.ucdavis.edu/~okreylos/ResDev/SARndbox/LinkSoftwareInstallation.html
+  * https://arsandbox.ucdavis.edu/