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| 20文字 x 9行 |
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| スマートタグ |
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| 電源、BeagleBone,モータドライバ |
'''
python-opencv tutorial
Annotate message to image.
Usage:
09_annotate.py imagename
'''
import cv2
import sys
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s imagefilename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
#putText(...)
# putText(img, text, org, fontFace, fontScale, color[, thickness[, linetype[, bottomLeftOrigin]]]) -> None
msg='HELLO,OpenCV!'
location=(0,30)
fontface=cv2.FONT_HERSHEY_PLAIN
fontscale=1.0
color=(255,190,0) #sky blue
cv2.putText(img,msg,location,fontface,fontscale,color)
#big size
fontscale=2.0
location=(0,img.shape[0]/2)
thickness=2
cv2.putText(img,msg,location,fontface,fontscale,color,thickness)
cv2.imshow('Annotated Image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
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| 文字列の書き込み |
'''
python-opencv tutorial
Example of mouse callback
draw a circle or rectangle to clicked point.
Usage:
10_mouse_callback.py imagename
'''
import cv2
import sys
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s imagefilename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
usage='left click to draw a circle.\nright click to draw a rectangle.\n'
usage=usage+'press any key to exit.'
print(usage)
windowName="mouse"
cv2.namedWindow(windowName)
def onMouse(event, x, y, flags, param):
"""
Mouse event callback function.
left click -> draw circle
right click -> draw rectangle
"""
if event == cv2.EVENT_MOUSEMOVE:return
if event == cv2.EVENT_LBUTTONDOWN:
center=(x,y)
radius=10
color=(255,255,0)
cv2.circle(img,center,radius,color)
if event == cv2.EVENT_RBUTTONDOWN:
rect_start=(x-10,y-10)
rect_end=(x+10,y+10)
color=(100,255,100)
cv2.rectangle(img,rect_start,rect_end,color)
cv2.imshow(windowName,img)
#setMouseCallback(...)
# setMouseCallback(windowName, onMouse [, param]) -> None
cv2.setMouseCallback(windowName,onMouse)
cv2.imshow(windowName,img)
cv2.waitKey(0)
cv2.destroyAllWindows()
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| マウスイベントの処理 |
"""
webcamera server
for opencv 2.3
"""
import SocketServer
import cv2.cv as cv
import numpy
import socket
import sys
#for OpenCV2.3 python interface
class TCPHandler(SocketServer.BaseRequestHandler):
capture=''
def handle(self):
# self.request is the TCP socket connected to the client
self.data = self.request.recv(1024).strip()
print "%s connected:" % self.client_address[0]
frame=cv.QueryFrame(capture)
jpegstring=cv.EncodeImage('.jpeg',frame).tostring()
print len(jpegstring)
self.request.send(jpegstring)
if __name__ == "__main__":
HOST, PORT = '192.168.111.40', 12345
#init camera
cameraid=0
capture=cv.CreateCameraCapture(0)
cv.SetCaptureProperty(capture,cv.CV_CAP_PROP_FRAME_WIDTH,320)
cv.SetCaptureProperty(capture,cv.CV_CAP_PROP_FRAME_HEIGHT,240)
if not capture:
print "Could not open camera"
exit()
server = SocketServer.TCPServer((HOST, PORT), TCPHandler)
# Activate the server; this will keep running until you
# interrupt the program with Ctrl-C
server.capture=capture
server.serve_forever()
'''
Image receiver
for OpenCV 2.4 python interface
'''
import socket
import sys
import numpy
import cv2
# for opencv 2.4.2
HOST, PORT = "192.168.111.40", 12345
# Receive data from the server and shut down
quitflag=False
recvlen=1
def getImageFromServer():
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.connect((HOST,PORT))
sock.send('HELLO\n')
recvlen=100
buffer=''
while recvlen>0:
receivedstr=sock.recv(1024*8)
recvlen=len(receivedstr)
buffer +=receivedstr
print '%d bytes received' %len(buffer)
narray=numpy.fromstring(buffer,dtype='uint8')
decimg=cv2.imdecode(narray,1)
sock.close()
return decimg
while 1:
img=getImageFromServer()
cv2.imshow('Capture',img)
key=cv2.waitKey(100)
if(int(key)>27): break
img=''
'''
python-opencv tutorial
Create image ROI(Region of Interest)
Usage:
07_image_roi.py imagename
'''
#import opencv library
import cv2
import sys
import numpy
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s imagefilename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
imgshape=img.shape
roiWidth=imgshape[1]/4
roiHeight=imgshape[0]/4
sx=imgshape[1]/2-roiWidth
sy=imgshape[0]/2-roiHeight
ex=imgshape[1]/2+roiWidth
ey=imgshape[0]/2+roiHeight
#extract roi as array
roi=img[sy:ey,sx:ex]
#invert roi area
img[sy:ey,sx:ex]=cv2.bitwise_not(roi)
cv2.imshow('roi image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
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'''
python-opencv tutorial
Encode and decode image data.
Usage:
08_image_encode_decode.py imagename
'''
#import opencv library
import cv2
import sys
import numpy
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s imagefilename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
#encode to jpeg format
#encode param image quality 0 to 100. default:95
#if you want to shrink data size, choose low image quality.
encode_param=[int(cv2.IMWRITE_JPEG_QUALITY),90]
result,encimg=cv2.imencode('.jpg',img,encode_param)
if False==result:
print 'could not encode image!'
quit()
#decode from jpeg format
decimg=cv2.imdecode(encimg,1)
cv2.imshow('Source Image',img)
cv2.imshow('Decoded image',decimg)
cv2.waitKey(0)
cv2.destroyAllWindows()
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'''
python-opencv tutorial
Make gaussian pyramid
Usage:
05_GaussianPyramid.py
'''
#import opencv library
import cv2
import numpy
imgwidth=800
imgheight=800
img_original= numpy.zeros((imgheight,imgwidth,1),numpy.uint8)
#draw some circle
for i in range(1,6):
cv2.circle(img_original,(20*2**i,20*2**i),i*10,(255,255,255),2)
#pyrDown(...)
# pyrDown(src[, dst[, dstsize[, borderType]]]) -> dst
#make half size and quater size
img_half=cv2.pyrDown(img_original)
img_quat=cv2.pyrDown(img_half)
cv2.imshow('original',img_original)
cv2.imshow('Half size',img_half)
cv2.imshow('Quater size',img_quat)
cv2.waitKey()
cv2.destroyAllWindows()
''' python-opencv tutorial Get image from web camera Usage: 06_webcamera.py ''' #import opencv library import cv2 #VideoCapture(...) # VideoCapture() -># or VideoCapture(filename) -> # or VideoCapture(device) -> #get capture object cameraid=0 capture=cv2.VideoCapture(cameraid) isopen=capture.isOpened() if(False==isopen): #retry to open camera capture.open(cameraid) isopen=capture.isOpened() if(False==isopen): #could not open camera... print 'Could not open camera.' exit() #get camera attribute imwidth=capture.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH) imheight=capture.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT) print 'img width %d height %d ' % (imwidth,imheight) print 'press ESC or q to quit' #capture image and display to monitor while True: ret,frame=capture.read() if not ret: print 'Could not capture frame.' exit() cv2.imshow('Captured Frame',frame) inputkey=cv2.waitKey(100) c=chr(inputkey & 255) if c in ['q',chr(27)]: break #release capture if(capture.isOpened()): capture.release() cv2.destroyAllWindows()
"""python-opencv tutorial
Create trackbar control.
Usage:
03_trackbar.py
"""
#import opencv library
import cv2
import numpy
#Trackbar callback function
def onTrackbarChange(trackbarValue):
imgshape=fullcolorimage.shape
fimg=numpy.zeros(imgshape,numpy.uint8)
colorval=trackbarValue*10
diff=trackbarValue*10
xcenter=imgshape[1]/2
ycenter=imgshape[0]/2
color=(colorval,colorval,colorval)
cv2.rectangle(fimg, (xcenter-diff, ycenter-diff), (xcenter+diff, ycenter+diff), color, -1)
cv2.imshow(windowName, fimg)
imgwidth=640
imgheight=480
fullcolorimage = numpy.zeros((imgheight,imgwidth,3),numpy.uint8)
windowName="TrackbarSample"
cv2.namedWindow(windowName)
onTrackbarChange(0)
#createTrackbar(...)
# createTrackbar(trackbarName, windowName, value, count, onChange) -> None
cv2.createTrackbar( 'Trackbarname', windowName, 0, 25, onTrackbarChange )
cv2.waitKey()
cv2.destroyAllWindows()
"""
python-opencv tutorial
Gaussian filter sample script.
Usage:
04_smooth.py imagename
"""
#import opencv library
import cv2
import sys
import numpy
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s filename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
#GaussianBlur(...)
# GaussianBlur(src, ksize, sigmaX[, dst[, sigmaY[, borderType]]]) -> dst
# ksize must pair of odd. (5,5),(7,7),(9,9)...
bluredimg=cv2.GaussianBlur(img,(11,11),0)
cv2.imshow('Gaussian',bluredimg)
cv2.imshow('Source',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
'''
python-opencv tutorial
Load image file from disk.
Usage:
00_loadImage.py imagefile
'''
#import opencv library
import cv2
import sys
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s filename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
#show image
windowName= 'LoadImage'
cv2.imshow(windowName, img)
print 'Press any key to exit.'
cv2.waitKey(0)
'''
python-opencv tutorial
Resize image to half size and
convert to gray scale image.
Usage:
01_resize_and_convertColor.py imagefile
'''
#import opencv library
import cv2
import sys
argvs=sys.argv
if (len(argvs) != 2):
print 'Usage: # python %s filename' % argvs[0]
quit()
imagefilename = argvs[1]
try:
img=cv2.imread(imagefilename, 1)
except:
print 'faild to load %s' % imagefilename
quit()
#define small image size
imgsize=img.shape
#imgsize = (height,width,depth)
simg_width=imgsize[1]/2
simg_height=imgsize[0]/2
#half size image and grayscaled image
simg=cv2.resize(img,(simg_width,simg_height))
gimg=cv2.cvtColor(simg,cv2.COLOR_BGR2GRAY)
cv2.imshow('Half size',simg)
cv2.imshow('Grayscaled',gimg)
print 'Press any key to exit.'
cv2.waitKey(0)
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| 概要図 |
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| 自家用ならではの見た目度外視工作 |
 | |
| 本体部分の大きさは約30センチ。 |
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| 点灯中の様子。電球色なので柔らかい感じに |
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| 印刷してはがきなどに貼ります。 |
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| こんな感じで切り出します。 枠もはさみで切っちゃってください |
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| 載せます |
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| 完成！！ |
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| ガイド用紙。硬い紙に印刷するとよさそう |
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| BeagleBoneを置いたところ。 |
/*
*Beagle Bone
*Sample code for analog input.
*/
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
//LM35D
float VoltageToTemp(float voltage)
{
//LM35D 10.0mV/Celsius
return voltage*1000/10;
}
void printCurrentTime()
{
//
time_t t;
struct tm *s_time;
char str[100];
(void) time(&t);
s_time=localtime(&t);
fprintf(stdout,"%4d-%02d-%02d %02d:%02d:%02d",1900+s_time->tm_year,s_time->tm_mon+1,s_time->tm_mday,
s_time->tm_hour,s_time->tm_min,s_time->tm_sec);
}
//Convert digitalvalue to voltage.
float digitalValueToVoltage(int digValue)
{
int analogResolution=4096;// 12bit A/D converter in BeagleBone
float voltage=0;
float maxInputVoltage= 1.8f;
float rate=(float)(maxInputVoltage/analogResolution);
return (float)(rate*digValue);
}
int main()
{
int filedescriptor=open("/sys/devices/platform/tsc/ain1", O_RDONLY);
fprintf(stdout,"start templuture monitoring\n");
char buffer[128];
while(1)
{
int readcount=read(filedescriptor,buffer,sizeof(buffer));
if(-1!=readcount)
{
buffer[readcount]=NULL;
lseek(filedescriptor,0,0);//reset seek position
int digitalValue=atoi(buffer);
float voltage=digitalValueToVoltage(digitalValue);
float templuture=VoltageToTemp(voltage);
printCurrentTime();
fprintf(stdout," ReadValue:%d\tVoltage:%2.3fV\tTemplture:%2.1f\n",digitalValue,voltage,templuture);
}
else
{
fprintf(stdout,"could not read from ain2\n");
return -1;
}
sleep(1);
}
close(filedescriptor);
return 0;
}
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| １箱しかない。。。 |
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| LED3個と1個。そこそこ明るい |
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| 1個タイプ点灯時 |
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| USB電源に取り付け |
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| 点灯中。かなり明るい。直視注意 |
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| ひとまずAndroidでブギーボード検出ができました |
