def scan():
"""
Open up the webcam and scans the 9 regions in the center
and show a preview.
After hitting the space bar to confirm, the block below the
current stickers shows the current state that you have.
This is show every user can see what the computer took as input.
:returns: dictionary
"""
sides = {} # collection of scanned sides
preview = ['white','white','white', # default starting preview sticker colors
'white','white','white',
'white','white','white']
state = [0,0,0, # current sticker colors
0,0,0,
0,0,0]
defaultcal = { # default color calibration
'white':[[179,30,255],[0,0,0]],
'green':[[102,255,184],[63,85,39]],
'red':[[172,255,147],[13,165,86]],
'orange':[[172,255,255],[7,136,148]],
'yellow':[[43,172,235],[23,20,52]],
'blue':[[118,255,194],[89,178,51]]
}
colorcal = {} # color calibration dictionary
color = ['white', 'green', 'red', 'orange', 'yellow', 'blue'] # list of valid colors
cv2.namedWindow('default',0)
# create trackbars here
cv2.createTrackbar('H Upper',"default",defaultcal[color[len(colorcal)]][0][0],179, empty_callback)
cv2.createTrackbar('H Lower',"default",defaultcal[color[len(colorcal)]][0][1],179, empty_callback)
# Remember that the range for S and V are not 0 to 179
# make four more trackbars for ('S Upper', 'S Lower', 'V Upper', 'V Lower')
# Note you should use these trackbar names to make other parts of the code run properly
colorcal = defaultcal
##################################################
# Task 1: you can insert out of the loop code here
##################################################
while cameratesting:
'''
Here we want to make sure things are working and learn about how to use some openCV functions
Your code here
'''
#task 1.2 preview a camera window
#task 1.3 draw a rectangle
#task 1.4 make a slider
#task 1.5 add text
#task 1.6 make a mask based on hsv
#task 1.7 display the masked image
while not cameratesting:
_, frame = None # your code here
hsv = None # your code here
key = None # your code here
# init certain stickers.
draw_detector_stickers(frame)
draw_recorded_stickers(frame, preview)
for index,(x,y) in enumerate(detector_stickers):
roi = hsv[y:y+32, x:x+32] # extracts hsv values within sticker
avg_hsv = ColorDetector.median_hsv(roi) # filters the hsv values into one hsv
color_name = ColorDetector.get_color_name(avg_hsv,colorcal) # extracts the color based on hsv
state[index] = color_name # stores the color
# update when space bar is pressed.
if key == 32:
preview = list(state)
draw_recorded_stickers(frame, state) # draw the saved colors on the preview
face = color_to_notation(state[4]) # convert the color to notation of the middle sticker and label this as the face
notation = [color_to_notation(color) for color in state] # convert all colors to notation
sides[face] = notation # update the face in the sides dictionary
# show the new stickers
draw_current_stickers(frame, state) # draw live sampling of face colors
# append amount of scanned sides
text = 'scanned sides: {}/6'.format(len(sides))
cv2.putText(frame, text, (20, 460), cv2.FONT_HERSHEY_TRIPLEX, 0.5, (255,255,255), 1, cv2.LINE_AA)
# indicate the scanning instruction
textInstruction = 'scan and rotate the cube with white on the top and green on the front (towards camera)'
textInstruction2 = 'the color of center brick is used as the side identifier (since the center brick does not move)'
textInstruction3 = 'you can scan as many times as you want'
textInstruction4 = 'the program will overwrite the old scan when same side is detected'
cv2.putText(frame, textInstruction, (20, 600), cv2.FONT_HERSHEY_TRIPLEX, 0.5, (255,255,255), 1, cv2.LINE_AA)
cv2.putText(frame, textInstruction2, (20, 620), cv2.FONT_HERSHEY_TRIPLEX, 0.5, (255,255,255), 1, cv2.LINE_AA)
cv2.putText(frame, textInstruction3, (20, 640), cv2.FONT_HERSHEY_TRIPLEX, 0.5, (255,255,255), 1, cv2.LINE_AA)
cv2.putText(frame, textInstruction4, (20, 660), cv2.FONT_HERSHEY_TRIPLEX, 0.5, (255,255,255), 1, cv2.LINE_AA)
# quit on escape.
if key == 27:
break
# show result
cv2.imshow("default", frame)
if key == 99:
colorcal = {}
while len(colorcal) < 6:
_, frame = cam.read()
hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
key = cv2.waitKey(10) & 0xff
# hue upper lower
hu = cv2.getTrackbarPos('H Upper','default')
hl = cv2.getTrackbarPos('H Lower','default')
# saturation upper lower
su = None # yourcode here
sl = None # yourcode here
# value upper lower
vu = None # yourcode here
vl = None # yourcode here
if color[len(colorcal)] == 'red' or color[len(colorcal)] == 'orange':
lower_hsv = np.array([0,sl,vl])
upper_hsv = np.array([hl,su,vu])
mask1 = cv2.inRange(hsv, lower_hsv, upper_hsv)
lower_hsv = np.array([hu,sl,vl])
upper_hsv = np.array([179,su,vu])
mask2 = cv2.inRange(hsv, lower_hsv, upper_hsv)
mask = cv2.bitwise_or(mask1, mask2)
res = cv2.bitwise_and(frame,frame, mask= mask)
lower_hsv = np.array([hl,sl,vl])
upper_hsv = np.array([hu,su,vu])
else:
lower_hsv = np.array([hl,sl,vl])
upper_hsv = np.array([hu,su,vu])
# Task 3
mask = None # your code here
res = None # your code here
if key == 32:
defaultcal[color[len(colorcal)]] = [upper_hsv,lower_hsv]
colorcal[color[len(colorcal)]] = [upper_hsv,lower_hsv]
if(len(colorcal) < 6):
cv2.setTrackbarPos('H Upper','default',defaultcal[color[len(colorcal)]][0][0])
cv2.setTrackbarPos('S Upper','default',defaultcal[color[len(colorcal)]][0][1])
cv2.setTrackbarPos('V Upper','default',defaultcal[color[len(colorcal)]][0][2])
cv2.setTrackbarPos('H Lower','default',defaultcal[color[len(colorcal)]][1][0])
cv2.setTrackbarPos('S Lower','default',defaultcal[color[len(colorcal)]][1][1])
cv2.setTrackbarPos('V Lower','default',defaultcal[color[len(colorcal)]][1][2])
if(len(colorcal) < 6):
text = 'calibrating {}'.format(color[len(colorcal)])
cv2.putText(res, text, (20, 460), cv2.FONT_HERSHEY_TRIPLEX, 0.5, (255,255,255), 1, cv2.LINE_AA)
cv2.imshow("default", res)
# quit on escape key.
if key == 27:
break
cam.release()
cv2.destroyAllWindows()
return sides if len(sides) == 6 else False
