def threshold_image():
""" runs the image processing in order to create a
black and white thresholded image out of D.image
into D.threshed_image.
"""
# get D so that we can change values in it
global D
# Use OpenCV to split the image up into channels, saving them in gray images
cv.Split(D.image, D.blue, D.green, D.red, None)
# This line creates a hue-saturation-value image
cv.CvtColor(D.image, D.hsv, cv.CV_RGB2HSV)
cv.Split(D.hsv, D.hue, D.sat, D.val, None)
# Here is how OpenCV thresholds the images based on the slider values:
cv.InRangeS(D.red, D.thresholds["low_red"], D.thresholds["high_red"],
D.red_threshed)
cv.InRangeS(D.blue, D.thresholds["low_blue"], D.thresholds["high_blue"],
D.blue_threshed)
cv.InRangeS(D.green, D.thresholds["low_green"], D.thresholds["high_green"],
D.green_threshed)
cv.InRangeS(D.hue, D.thresholds["low_hue"], D.thresholds["high_hue"],
D.hue_threshed)
cv.InRangeS(D.sat, D.thresholds["low_sat"], D.thresholds["high_sat"],
D.sat_threshed)
cv.InRangeS(D.val, D.thresholds["low_val"], D.thresholds["high_val"],
D.val_threshed)
# Multiply all the thresholded images into one "output" image, D.threshed_image
cv.Mul(D.red_threshed, D.green_threshed, D.threshed_image)
cv.Mul(D.threshed_image, D.blue_threshed, D.threshed_image)
cv.Mul(D.threshed_image, D.hue_threshed, D.threshed_image)
cv.Mul(D.threshed_image, D.sat_threshed, D.threshed_image)
cv.Mul(D.threshed_image, D.val_threshed, D.threshed_image)
def create_image(self):
#Find the size of the image
#Create images for each channel
blue = cv.CreateImage(self.size, 8, 1)
red = cv.CreateImage(self.size, 8, 1)
green = cv.CreateImage(self.size, 8, 1)
hue = cv.CreateImage(self.size, 8, 1)
sat = cv.CreateImage(self.size, 8, 1)
val = cv.CreateImage(self.size, 8, 1)
#Create an image to be returned and eventually displayed
thresholds = cv.CreateImage(self.size, 8, 1)
#Create images to save the thresholded images to
red_threshed = cv.CreateImage(self.size, 8, 1)
green_threshed = cv.CreateImage(self.size, 8, 1)
blue_threshed = cv.CreateImage(self.size, 8, 1)
hue_threshed = cv.CreateImage(self.size, 8, 1)
sat_threshed = cv.CreateImage(self.size, 8, 1)
val_threshed = cv.CreateImage(self.size, 8, 1)
#Split the image up into channels, saving them in their respective image
cv.Split(self.image, blue, green, red, None)
cv.CvtColor(self.image, self.hsv, cv.CV_RGB2HSV)
cv.Split(self.hsv, hue, sat, val, None)
#Threshold the images based on the slider values
cv.InRangeS(red, self.thresholds['low_red'],\
self.thresholds['high_red'], red_threshed)
cv.InRangeS(green, self.thresholds['low_green'],\
self.thresholds['high_green'], green_threshed)
cv.InRangeS(blue, self.thresholds['low_blue'],\
self.thresholds['high_blue'], blue_threshed)
cv.InRangeS(hue, self.thresholds['low_hue'],\
self.thresholds['high_hue'], hue_threshed)
cv.InRangeS(sat, self.thresholds['low_sat'],\
self.thresholds['high_sat'], sat_threshed)
cv.InRangeS(val, self.thresholds['low_val'],\
self.thresholds['high_val'], val_threshed)
#Recombine all of the thresholded images into one image
cv.Mul(red_threshed, green_threshed, thresholds)
cv.Mul(thresholds, blue_threshed, thresholds)
cv.Mul(thresholds, hue_threshed, thresholds)
cv.Mul(thresholds, sat_threshed, thresholds)
cv.Mul(thresholds, val_threshed, thresholds)
#Erode and Dilate shave off and add edge pixels respectively
cv.Erode(thresholds, thresholds, iterations=1)
cv.Dilate(thresholds, thresholds, iterations=1)
return thresholds
def TransformImage(self, bgr, hsv, channels, size, method): assert(bgr.type == cv.CV_8UC3) assert(hsv.type == cv.CV_8UC3) chs_all = [ cv.CreateMat(hsv.rows, hsv.cols, cv.CV_8UC1) for i in range(0, 6) ] cv.Split(bgr, chs_all[CH_BLUE], chs_all[CH_GREEN], chs_all[CH_RED], None) cv.Split(hsv, chs_all[CH_HUE], chs_all[CH_SAT], chs_all[CH_VAL], None) chs = [ cv.GetImage(chs_all[ch]) for ch in channels ] dst = cv.CreateMat(hsv.rows - size[1] + 1, hsv.cols - size[0] + 1, cv.CV_32FC1) cv.CalcBackProjectPatch(chs, dst, size, self.hist_pos, method, 1.0) return dst
def hs_histogram(src, patch):
# Convert to HSV
hsv = cv.CreateImage(cv.GetSize(src), 8, 3)
cv.CvtColor(src, hsv, cv.CV_BGR2HSV)
hsv_patch= cv.CreateImage(cv.GetSize(patch), 8, 3)
# Extract the H and S planes
h_plane = cv.CreateMat(src.rows, src.cols, cv.CV_8UC1)
h_plane_img = cv.CreateImage(cv.GetSize(src), 8, 1)
h_plane_patch = cv.CreateMat(patch.rows, patch.cols, cv.CV_8UC1)
s_plane = cv.CreateMat(src.rows, src.cols, cv.CV_8UC1)
s_plane_img = cv.CreateImage(cv.GetSize(src), 8, 1)
s_plane_patch = cv.CreateMat(patch.rows, patch.cols, cv.CV_8UC1)
v_plane = cv.CreateMat(src.rows, src.cols, cv.CV_8UC1)
cv.Split(hsv, h_plane, s_plane, v_plane, None)
cv.Split(hsv, h_plane_img, s_plane_img, None, None)
cv.Split(hsv_patch, h_plane_patch, s_plane_patch, None, None)
#cv.Split(src, h_plane, s_plane, v_plane, None)
planes = [h_plane_patch, s_plane_patch]#, s_plane, v_plane]
h_bins = 30
s_bins = 32
v_bins = 30
hist_size = [h_bins, s_bins]
# hue varies from 0 (~0 deg red) to 180 (~360 deg red again */
h_ranges = [0, 180]
# saturation varies from 0 (black-gray-white) to
# 255 (pure spectrum color)
s_ranges = [0, 255]
v_ranges = [0, 255]
ranges = [h_ranges, s_ranges]#, s_ranges, v_ranges]
scale = 10
hist = cv.CreateHist([h_bins, s_bins], cv.CV_HIST_ARRAY, ranges, 1)
cv.CalcHist([cv.GetImage(i) for i in planes], hist)
(_, max_value, _, _) = cv.GetMinMaxHistValue(hist)
hist_img = cv.CreateImage((h_bins*scale, s_bins*scale), 8, 3)
back_proj_img = cv.CreateImage(cv.GetSize(src), 8, 1)
cv.CalcBackProject([h_plane_img, s_plane_img], back_proj_img, hist)
# for h in range(h_bins):
# for s in range(s_bins):
# bin_val = cv.QueryHistValue_2D(hist, h, s)
# intensity = cv.Round(bin_val * 255 / max_value)
# cv.Rectangle(hist_img,
# (h*scale, s*scale),
# ((h+1)*scale - 1, (s+1)*scale - 1),
# cv.RGB(intensity, intensity, intensity),
# cv.CV_FILLED)
return back_proj_img, hist
def image_callback(data):
global running
if (running):
image = bridge.imgmsg_to_cv(data, "bgr8")
#normalize image
cv.Split(image, rgb_r, rgb_g, rgb_b, None)
red_mean = cv2.mean(np.asarray(rgb_r[:, :]))
cv.Div(src2=cv.fromarray(np.ones((480, 640))),
src1=rgb_r,
dst=scaled_r,
scale=128 / red_mean[0])
green_mean = cv2.mean(np.asarray(rgb_g[:, :]))
cv.Div(src2=cv.fromarray(np.ones((480, 640))),
src1=rgb_g,
dst=scaled_g,
scale=128 / green_mean[0])
blue_mean = cv2.mean(np.asarray(rgb_b[:, :]))
cv.Div(src2=cv.fromarray(np.ones((480, 640))),
src1=rgb_b,
dst=scaled_b,
scale=128 / blue_mean[0])
cv.Merge(scaled_r, scaled_g, scaled_b, None, cv_image)
cv.CvtColor(cv_image, hsv, cv.CV_BGR2HSV) # --convert from BGR to HSV
cv.CvtColor(cv_image, lab, cv.CV_BGR2Lab)
cv.Split(hsv, hsv_h, hsv_s, hsv_v, None)
cv.Split(cv_image, rgb_r, rgb_g, rgb_b, None)
cv.Split(lab, lab_l, lab_a, lab_b, None)
cv.Split(luv, luv_l, luv_u, luv_v, None)
cv.Split(hls, hls_h, hls_l, hls_s, None)
cv.Split(xyz, xyz_x, xyz_y, xyz_x, None)
cv.Split(ycrcb, ycrcb_y, ycrcb_cr, ycrcb_cb, None)
cv.Not(lab_a, a_not)
cv.Sub(hsv_s, a_not, sa)
cv.Sub(luv_u, hls_h, test)
cv.Sub(hls_s, hls_h, sminh)
threshold_red(sa)
cv.ShowImage("red", red_dilated_image)
red_contours, _ = cv2.findContours(image=np.asarray(
red_dilated_image[:, :]),
mode=cv.CV_RETR_EXTERNAL,
method=cv.CV_CHAIN_APPROX_SIMPLE)
print_lidar_projections(cv_image)
circles = extract_circles(red_contours, [1, 0, 0])
for x, y, radius in circles:
cv.Circle(cv_image, (x, y), radius, [0, 0, 1], 3)
cv.SetMouseCallback("camera feed", mouse_callback, hsv_image)
cv.ShowImage("camera feed", cv_image)
cv.WaitKey(3)
def wximg_to_cv(wximg, flatten=False):
""" Converts a WxImage to a OpenCV IplImage, with optional conversion
to Grayscale (single channel).
"""
w, h = wximg.GetWidth(), wximg.GetHeight()
#wximg = wximg.Copy()
if flatten:
wximg = wximg.ConvertToGreyscale()
#data = wximg.GetData()
#cv_im = cv.CreateImage((w, h), cv.IPL_DEPTH_8U, 3)
#cv.SetData(cv_im, data)
#cv_mat = cv.CreateMat(h,w, cv.CV_8UC3)
#cv.SetData(cv_mat, data)
#cv_mathead= cv.CreateMatHeader(h, w, cv.CV_8UC3)
#cv.CreateData(cv_mathead)
#cv.SetData(cv_mat, data)
cv_mat = cv.CreateMat(h, w, cv.CV_8UC3)
cv.SetData(cv_mat, wximg.GetData())
#cv.Copy(data, cv_mat)
if flatten:
#cv.SetImageCOI(cv_im, 1)
#res = cv.CreateImage((w,h), cv.IPL_DEPTH_8U, 1)
#cv.Copy(cv_im, res)
#return res
res = cv.CreateMat(h, w, cv.CV_8UC1)
cv.Split(cv_mat, res, None, None, None)
return res
else:
return cv_mat
def get_three_planes(src):
channels = [None] * 4
size = cv.GetSize(src)
for i in range(src.channels):
channels[i] = cv.CreateImage(size, src.depth, 1)
cv.Split(src, channels[0], channels[1], channels[2], None)
return channels[:3]
def hsv_orange_red_threshold(input_image):
blur_image = cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC3)
cv.Smooth(input_image, blur_image, cv.CV_BLUR, 10, 10)
proc_image = cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC3)
cv.CvtColor(blur_image, proc_image, cv.CV_BGR2HSV)
split_image = [
cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1),
cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1),
cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1)
]
cv.Split(proc_image, split_image[0], split_image[1], split_image[2], None)
thresh_0 = cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1)
thresh_1 = cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1)
thresh_2 = cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1)
red_orange = cv.CreateMat(input_image.rows, input_image.cols, cv.CV_8UC1)
cv.Threshold(split_image[1], thresh_0, 128, 255,
cv.CV_THRESH_BINARY) # > 50% saturation
cv.Threshold(split_image[0], thresh_1, 220, 255,
cv.CV_THRESH_BINARY) # > Purple
cv.Threshold(split_image[0], thresh_2, 10, 255,
cv.CV_THRESH_BINARY_INV) # < Yellow-Orange
cv.Add(thresh_1, thresh_2, red_orange)
cv.And(red_orange, thresh_0, red_orange)
return red_orange
def hs_histogram(src):
# Convert to HSV
hsv = cv.CreateImage(cv.GetSize(src), 8, 3)
cv.CvtColor(src, hsv, cv.CV_BGR2HSV)
# Extract the H and S plane
h_plane = cv.CreateMat(src.rows, src.cols, cv.CV_8UC1)
s_plane = cv.CreateMat(src.rows, src.cols, cv.CV_8UC1)
cv.Split(hsv, h_plane, s_plane, None, None)
planes = [h_plane, s_plane]
h_bins = 30
s_bins = 32
hist_size = [h_bins, s_bins]
# hue varies from 0 to 180
h_ranges = [0, 180]
# saturation varies from 0 to 255
s_ranges = [0, 255]
ranges = [h_ranges, s_ranges]
scale = 10
hist = cv.CreateHist([h_bins, s_bins], cv.CV_HIST_ARRAY, ranges, 1)
cv.CalcHist([cv.GetImage(i) for i in planes], hist)
(_, max_value, _, _) = cv.GetMinMaxHistValue(hist)
hist_img = cv.CreateImage((h_bins * scale, s_bins * scale), 8, 3)
for h in range(h_bins):
for s in range(s_bins):
bin_val = cv.QueryHistValue_2D(hist, h, s)
intensity = cv.Round(bin_val * 255 / max_value)
cv.Rectangle(hist_img, (h * scale, s * scale),
((h + 1) * scale - 1, (s + 1) * scale - 1),
cv.RGB(intensity, intensity, intensity), cv.CV_FILLED)
return hist_img
def compute_histogram(self, img, bin_fact=cv.IPL_DEPTH_8U, min_range=0):
"""
Creates the histogram of the input image
Returns a Tippy histogram, with one item by channel of input image.
The number of bins is 2^bin_fact (256 by default)
min_range is the value of the lowest bin
max_range is automatically calculated using the input image depth.
max_range = (2^img_depth)
NOTE : Supports only 8 bits images for now.
More should be added soon.
"""
# TESTS
try:
dims = cv.GetSize(img)
except TypeError:
raise TypeError("(%s) img : IplImage expected!" %
(sys._getframe().f_code.co_name))
# img test
#if not(img.depth == cv.IPL_DEPTH_8U):
# raise TypeError("(%s) 8U image expected!"
# % (sys._getframe().f_code.co_name))
if img.nChannels not in [1, 3]:
raise ValueError("(%s) 1 or 3 channels image expected!" %
(sys._getframe().f_code.co_name))
# bin_fact test
if (bin_fact <= 0 or ((bin_fact % 2) != 0)):
raise ValueError("(%s) Positive odd integer expected!" %
(sys._getframe().f_code.co_name))
elif type(bin_fact) not in [int, long]:
raise TypeError("(%s) Positive odd integer expected!" %
(sys._getframe().f_code.co_name))
# min_range test
if type(min_range) != int:
raise TypeError("(%s) Positive odd integer expected!" %
(sys._getframe().f_code.co_name))
self.channels = img.nChannels
self.nb_bins = int(pow(2, bin_fact))
self.depth = int(img.depth)
max_range = pow(2, bin_fact) + min_range - 1
self.ranges = [min_range, max_range]
img_list = []
# preparing images depending on nChannels
if self.channels == 1:
img_list = [img]
elif self.channels == 3:
# TODO: change this into function
img_1 = cv.CreateImage(dims, cv.IPL_DEPTH_8U, 1)
img_2 = cv.CreateImage(dims, cv.IPL_DEPTH_8U, 1)
img_3 = cv.CreateImage(dims, cv.IPL_DEPTH_8U, 1)
cv.Split(img, img_1, img_2, img_3, None)
img_list = [img_1, img_2, img_3]
self.cvhist = self._compute_1ch_histogram(img_list)
def update_hue(self, frame):
""" Convert frame to HSV and keep the hue
"""
hsv = cv.CreateImage(cv.GetSize(frame), 8, 3)
cv.CvtColor(frame, hsv, cv.CV_BGR2HSV)
self.hue = cv.CreateImage(cv.GetSize(frame), 8, 1)
cv.Split(hsv, self.hue, None, None, None)
def main(args):
if args.output_directory:
directory = args.output_directory
else:
directory = os.path.dirname(args.input_image)
print "No output directory specified. Defaulting to %s" % directory
if not os.path.exists(directory):
os.makedirs(directory)
if args.output_prefix:
prefix = args.output_prefix
extension = os.path.splitext(os.path.basename(args.input_image))[1]
else:
prefix, extension = os.path.splitext(os.path.basename(
args.input_image))
print "No output prefix selected. Defaulting to %s" % prefix
output_file = "%s/%s%s" % (directory, prefix, extension)
image = cv.LoadImage(args.input_image)
input_image = cv.LoadImage(args.input_image)
mask = cv.CreateImage(cv.GetSize(input_image), 8, 1)
image_hue = cv.CreateImage(cv.GetSize(input_image), 8, 1)
image_hsv = cv.CreateImage(cv.GetSize(input_image), 8, 3)
cv.CvtColor(input_image, image_hsv, cv.CV_BGR2HSV)
cv.Split(image_hsv, image_hue, None, None, None)
upper_thresh = cv.CreateImage(cv.GetSize(input_image), 8, 1)
lower_thresh = cv.CreateImage(cv.GetSize(input_image), 8, 1)
cv.Threshold(image_hue, upper_thresh, args.hue_max, 255,
cv.CV_THRESH_BINARY)
cv.Threshold(image_hue, lower_thresh, args.hue_min, 255,
cv.CV_THRESH_BINARY_INV)
cv.Or(upper_thresh, lower_thresh, mask)
cv.SaveImage(output_file, mask)
def threshold(self, frame, record, op=cv.And, magic=False):
"""Threshold a frame using a record of min/max thresholds
Output is a new image.
"""
colorspace, min, max = record
tmp = cv.CloneImage(frame)
if magic:
cv.Smooth(tmp, tmp, cv.CV_GAUSSIAN, 11)
# Work in the correct colorspace
self.colorspaceConv[colorspace](tmp)
num_chans = len(min)
size = cv.GetSize(frame)
chan = [
cv.CreateImage(size, cv.IPL_DEPTH_8U, 1) for _ in range(num_chans)
]
cv.Split(tmp, chan[0], chan[1], chan[2], None)
minS = map(cv.Scalar, min)
maxS = map(cv.Scalar, max)
for i in range(num_chans):
cv.InRangeS(chan[i], minS[i], maxS[i], chan[i])
out = cv.CreateImage(size, cv.IPL_DEPTH_8U, 1)
op(chan[0], chan[1], out)
op(out, chan[2], out)
return out
def split3(cvimg):
size = (cvimg.width, cvimg.height)
c1 = cv.CreateImage(size, cv.IPL_DEPTH_8U, 1)
c2 = cv.CreateImage(size, cv.IPL_DEPTH_8U, 1)
c3 = cv.CreateImage(size, cv.IPL_DEPTH_8U, 1)
cv.Split(cvimg, c1, c2, c3, None)
return c1, c2, c3
def hist_eq(self, frame):
cv.Split(frame, self.B, self.G, self.R, None)
cv.EqualizeHist(self.R, self.R)
cv.EqualizeHist(self.R, self.B)
cv.EqualizeHist(self.G, self.G)
cv.Merge(self.B, self.G, self.R, None, self.Ieq)
return self.Ieq
def get_image():
global corners
corners = []
im = cv.QueryFrame(camera)
im_rgb = cv.GetMat(im)
cv.CvtColor(im, im_rgb, cv.CV_BGR2RGB) #getting the rgbimage
#worst image grayscaling of all time.
#image = cv.CreateImage(cv.GetSize(im),cv.IPL_DEPTH_32F,3)
#cv.ConvertScale(im,image)
#new_image = cv.CreateImage(cv.GetSize(im),cv.IPL_DEPTH_32F,1)
#cv.CvtColor(image,new_image,cv.CV_BGR2GRAY)
#gray_image = cv.CreateImage(cv.GetSize(im),cv.IPL_DEPTH_8U,1)
#cv.ConvertScale(new_image,gray_image)
yuv = cv.CreateImage(cv.GetSize(im), 8, 3)
gray_image = cv.CreateImage(cv.GetSize(im), 8, 1)
cv.CvtColor(im, yuv, cv.CV_BGR2YCrCb)
cv.Split(yuv, gray_image, None, None, None)
eig_image = cv.CreateImage(cv.GetSize(gray_image), cv.IPL_DEPTH_32F, 1)
temp_image = cv.CreateImage(cv.GetSize(gray_image), cv.IPL_DEPTH_32F, 1)
for (x, y) in cv.GoodFeaturesToTrack(gray_image,
eig_image,
temp_image,
300,
0.01,
1.0,
useHarris=True):
corners.append([WIDTH - x, y])
return pygame.transform.flip(
pygame.image.frombuffer(im_rgb.tostring(), cv.GetSize(im_rgb), "RGB"),
True, False)
def processFrames(self):
self.vidcap = cv2.VideoCapture(self.path)
count = 0
success, image = self.vidcap.read()
print success
self.createWindows()
while True:
success, image = self.vidcap.read()
if not success:
return
spare = cv.fromarray(image)
size = (spare.width / 2, spare.height / 2)
cv.Smooth(spare, spare, cv.CV_GAUSSIAN, BLUR_SIZE, BLUR_SIZE)
out = cv.CreateImage(size, 8, 3)
cv.PyrDown(spare, out)
yuv = cv.CreateImage(size, 8, 3)
gray = cv.CreateImage(size, 8, 1)
canny = cv.CreateImage(size, 8, 1)
sobel = cv.CreateImage(size, 8, 1)
harris = cv.CreateImage(size, cv.IPL_DEPTH_32F, 1)
cv.CvtColor(out, yuv, cv.CV_BGR2YCrCb)
cv.Split(yuv, gray, None, None, None)
cv.Canny(gray, canny, 50, 200, 3)
cv.CornerHarris(gray, harris, 3)
cv.Sobel(gray, sobel, 1, 0, 3)
cv.ConvertScale(canny, canny, -1, 255)
cv.ConvertScale(sobel, sobel, -1, 255)
for y in range(0, out.height):
for x in range(0, out.width):
harr = cv.Get2D(sobel, y, x)
if harr[0] < 10e-06:
cv.Circle(out, (x, y), 2, cv.RGB(155, 0, 25))
#cv2.imwrite("frame%d.jpg" % count, np.asarray(canny[:,:]))
cv.ShowImage('canny', canny)
#cv.ShowImage( 'harris' , harris )
cv.ShowImage('sobel', sobel)
cv.ShowImage('output', out)
if cv2.waitKey(1) == 27:
break
count += 1
return
def calcHistogram(self, image):
cv.CvtColor(image, self.tmp, cv.CV_BGR2HSV)
cv.Split(self.tmp, self.B, self.G, self.R, None)
channels = self.B, self.G, self.R
hist_props = [{} for channel in channels]
#Normalisation constant for histogram size
size_norm = 255.0 / self.hist_size
for chnum, ch in enumerate(channels):
#, colour, Ypos in zip(channels, values, positions):
cv.CalcHist([ch], self.hist, 0, None)
hist_arr = self.smoothHistogram()
diffs = np.diff(hist_arr, 1)
hist_props[chnum]['plateaus'] = []
mins = [(0, 0)]
for i, v in enumerate(diffs):
if v < mins[-1][1]:
mins.append((i, v))
if hist_arr[i] > 1 and diffs[i - 1] * diffs[i] <= 0:
hist_props[chnum]['plateaus'].append(i * size_norm)
hist_props[chnum]['mins'] = [(i * size_norm, v) for i, v in mins]
#print "MINS:",mins
# Calculate beyond the 100th percentile due to numerical instability
ptile = range(0, 103, 1)
total = sum(hist_arr)
running_sum = 0
for i, v in enumerate(hist_arr):
running_sum += v
while running_sum >= total * ptile[0] / 100.0:
hist_props[chnum][ptile[0]] = i * size_norm
del ptile[0]
# Make sure all percentiles are actually in the data structure:
prev = 10
for p in ptile:
if p in hist_props[chnum]:
prev = p
else:
hist_props[chnum][p] = hist_props[chnum][prev]
assert 90 in hist_props[chnum], "percentile calculation incomplete"
post_peaks = mins[-1][0]
for i in range(mins[-1][0], len(diffs)):
if diffs[i - 1] * diffs[i] <= 0:
post_peaks = i
#print hist_arr[i:]
break
#print "POST:",post_peaks*size_norm
hist_props[chnum]['post_peaks'] = post_peaks * size_norm
#self.drawHistogram(tmp, chnum, hist_arr, plateaus)
return hist_props
def hough_extractor(self, side):
# create space for a single channel blue image (the robot is red, so I don't want to use that)
blue_image = cv.CreateImage((self.width/2, self.height), 8, 1)# half-width, for splitting down the middle
#cv.CvtColor(self.cv_image, blue_image, cv.CV_BGR2GRAY)
if side = "left":# the image is divided down the middle, so only look at appropriate side
cv.Split(self.left_image, blue_image)
def channels_split(image):
# -- split channels into individual channels
channel = []
# -- all rows and cols will have 8 bit unisg value
for x in range(0, 3):
channel.append(cv.CreateMat(image.rows, image.cols, cv.CV_8UC1))
cv.Split(image, channel[0], channel[1], channel[2], None)
return channel
def split3(iplimage):
if iplimage.nChannels != 3:
raise ValueError("The channel is not consistent.")
b = cv.CreateImage((iplimage.width, iplimage.height), cv.IPL_DEPTH_8U, 1)
g = cv.CreateImage((iplimage.width, iplimage.height), cv.IPL_DEPTH_8U, 1)
r = cv.CreateImage((iplimage.width, iplimage.height), cv.IPL_DEPTH_8U, 1)
cv.Split(iplimage, b, g, r, None)
return b, g, r
def getBrightness(img): hue = cv.CreateImage(cv.GetSize(img), cv.IPL_DEPTH_8U,1) sat = cv.CreateImage(cv.GetSize(img), cv.IPL_DEPTH_8U,1) val = cv.CreateImage(cv.GetSize(img), cv.IPL_DEPTH_8U,1) test = cv.CloneImage(img) cv.CvtColor(img,test, cv.CV_BGR2HSV) cv.Split(img, hue, sat,val,None) return cv.Avg(val)[0]
def split(im):
if im.nChannels == 3:
imr = new_from(im, nChannels=1)
img = new_from(im, nChannels=1)
imb = new_from(im, nChannels=1)
cv.Split(im, imr, img, imb, None)
return (imr, img, imb)
else:
return (im,)
def cutLetters(image, thresh, log):
mask = createMask(image, thresh)
log.log(mask)
h = cv.CreateImage(cv.GetSize(image), image.depth, 1)
cv.CvtColor(image, image, cv.CV_BGR2HSV)
cv.Split(image, h, None, None, None)
log.log(h)
cv.Set(h, cv.ScalarAll(255), mask)
return h
def get_raw_frame(self):
# Assumes that we are going to debayer the image later, so
# returns a single channel image.
im = cv.QueryFrame(self.capture)
if im == None:
raise NoFrameException('')
cv.Split(im, self.gray_image, None, None, None)
return self.gray_image
def run(self):
hist = cv.CreateHist([180], cv.CV_HIST_ARRAY, [(0, 180)], 1)
backproject_mode = False
while True:
frame = cv.QueryFrame(self.capture)
# Convert to HSV and keep the hue
hsv = cv.CreateImage(cv.GetSize(frame), 8, 3)
cv.CvtColor(frame, hsv, cv.CV_BGR2HSV)
self.hue = cv.CreateImage(cv.GetSize(frame), 8, 1)
print(self.hue)
cv.Split(hsv, self.hue, None, None, None)
# Compute back projection
backproject = cv.CreateImage(cv.GetSize(frame), 8, 1)
# Run the cam-shift
cv.CalcArrBackProject([self.hue], backproject, hist)
if self.track_window and is_rect_nonzero(self.track_window):
crit = (cv.CV_TERMCRIT_EPS | cv.CV_TERMCRIT_ITER, 10, 1)
(iters, (area, value, rect),
track_box) = cv.CamShift(backproject, self.track_window, crit)
self.track_window = rect
# If mouse is pressed, highlight the current selected rectangle
# and recompute the histogram
if self.drag_start and is_rect_nonzero(self.selection):
sub = cv.GetSubRect(frame, self.selection)
save = cv.CloneMat(sub)
cv.ConvertScale(frame, frame, 0.5)
cv.Copy(save, sub)
x, y, w, h = self.selection
cv.Rectangle(frame, (x, y), (x + w, y + h), (255, 255, 255))
sel = cv.GetSubRect(self.hue, self.selection)
cv.CalcArrHist([sel], hist, 0)
(_, max_val, _, _) = cv.GetMinMaxHistValue(hist)
if max_val != 0:
cv.ConvertScale(hist.bins, hist.bins, 255. / max_val)
elif self.track_window and is_rect_nonzero(self.track_window):
cv.EllipseBox(frame, track_box, cv.CV_RGB(255, 0, 0), 3,
cv.CV_AA, 0)
if not backproject_mode:
#frame=cv.Flip(frame)
cv.ShowImage("CamShiftDemo", frame)
else:
cv.ShowImage("CamShiftDemo", backproject)
cv.ShowImage("Histogram", self.hue_histogram_as_image(hist))
c = cv.WaitKey(7)
if c == 27:
break
elif c == ord("b"):
backproject_mode = not backproject_mode
def detect_and_draw(img, cascade):
# allocate temporary images
gray = cv.CreateImage((img.width, img.height), 8, 1)
small_img = cv.CreateImage((cv.Round(
img.width / image_scale), cv.Round(img.height / image_scale)), 8, 1)
# convert color input image to grayscale
cv.CvtColor(img, gray, cv.CV_BGR2GRAY)
# scale input image for faster processing
cv.Resize(gray, small_img, cv.CV_INTER_LINEAR)
cv.EqualizeHist(small_img, small_img)
window = cv.CreateImage((cv.Round(img.width), cv.Round(img.height)), 8, 3)
if (cascade):
t = cv.GetTickCount()
faces = local_haar_detect(small_img, cascade, cv.CreateMemStorage(0),
haar_scale, min_neighbors, haar_flags,
min_size)
t = cv.GetTickCount() - t
print "detection time = %gms" % (t / (cv.GetTickFrequency() * 1000.))
channels = None
if faces:
for ((x, y, w, h), n) in faces:
# the input to cv.HaarDetectObjects was resized, so scale the
# bounding box of each face and convert it to two CvPoints
pt1 = (cv.Round(
(x + w * .2) * image_scale), cv.Round(y * image_scale))
pt2 = (cv.Round(
(x + w * .8) * image_scale), cv.Round(
(y + h) * image_scale))
window = cv.CreateImage((cv.Round(w * .6) * image_scale,
cv.Round(h) * image_scale), 8, 3)
cv.Smooth(window, window, cv.CV_GAUSSIAN)
channels = [
cv.CreateImage((cv.Round(w * .6) * image_scale,
cv.Round(h) * image_scale), 8, 1),
cv.CreateImage((cv.Round(w * .6) * image_scale,
cv.Round(h) * image_scale), 8, 1),
cv.CreateImage((cv.Round(w * .6) * image_scale,
cv.Round(h) * image_scale), 8, 1)
]
cv.GetRectSubPix(img, window, (cv.Round(
(pt1[0] + pt2[0]) / 2.0), cv.Round(
(pt1[1] + pt2[1]) / 2.0)))
cv.Rectangle(img, pt1, pt2, cv.RGB(255, 0, 0), 3, 8, 0)
cv.Split(window, channels[0], channels[1], channels[2], None)
result.append([
cv.Avg(channels[0])[0],
cv.Avg(channels[1])[0],
cv.Avg(channels[2])[0]
])
cv.ShowImage("result", img)
def calc_hist(self):
self.hist = cv.CreateHist([self.h_bins, self.s_bins], cv.CV_HIST_ARRAY, self.ranges, 1)
hsv = cv.CreateImage(cv.GetSize(self.background_noise[0]), 8, 3)
h_plane = cv.CreateMat(self.background_noise[0].height, self.background_noise[0].width, cv.CV_8UC1)
s_plane = cv.CreateMat(self.background_noise[0].height, self.background_noise[0].width, cv.CV_8UC1)
for i in xrange(len(self.background_noise)):
cv.CvtColor(self.background_noise[i], hsv, cv.CV_BGR2HSV)
cv.Split(hsv, h_plane, s_plane, None, None)
planes = [h_plane, s_plane]#, s_plane, v_plane]
cv.CalcHist([cv.GetImage(i) for i in planes], self.hist, True, self.mask)
def process_rgb(self, dev, data, timestamp):
#global keep_running
# get an opencv version of video_cv data
frame = frame_convert.video_cv(data)
frame_size = cv.GetSize(frame)
# Convert to HSV and keep the hue
hsv = cv.CreateImage(frame_size, 8, 3)
cv.CvtColor(frame, hsv, cv.CV_BGR2HSV)
self.hue = cv.CreateImage(frame_size, 8, 1)
# split the image into different hues
cv.Split(hsv, self.hue, None, None, None)
# Compute back projection
# Run the cam-shift
backproject = cv.CreateImage(frame_size, 8, 1)
cv.CalcArrBackProject([self.hue], backproject, self.hist)
# if we have a tracking window... shift it
# Track_window => (rectangle of approx hue)
if self.track_window and is_rect_nonzero(self.track_window):
# set criteria for backproject iter
# compute back projections - shifting rectangle in
# appropriate direction
crit = (cv.CV_TERMCRIT_EPS | cv.CV_TERMCRIT_ITER, 10, 1)
(iters, (area, value, rect),
self.track_box) = cv.CamShift(backproject, self.track_window,
crit)
# set track_window to the newly selected rectangle
self.track_window = rect
# if a section is being selected - set the histogram
if self.debug:
sel = self.dbg_rgb.check_for_selection(self.track_window,
self.track_box)
# sets the histogram if there is a selection
if sel: self.set_hist(frame, sel)
self.dbg_rgb.update(frame)
#if self.track_window:
# self.dbg_rgb.add_box(self.track_box)
self.dbg_rgb.render()
# Bail out if ESC is pushed
key = cv.WaitKey(3)
char = chr(key & 255)
# k is for KILL
if char == 'k':
self.keep_running = False
else:
self.curr_classifier().respond_to_key(char)
def sat_threshold(image, min_sat):
image_hsv = cv.CloneImage(image)
cv.CvtColor(image, image_hsv, cv.CV_RGB2HSV)
image_sat = cv.CreateImage(cv.GetSize(image_hsv), 8, 1)
cv.Split(image_hsv, None, image_sat, None, None)
sat_thresh = cv.CloneImage(image_sat)
cv.Threshold(image_sat, sat_thresh, min_sat, 255, cv.CV_THRESH_BINARY)
image_out = cv.CloneImage(image)
cv.Zero(image_out)
cv.Copy(image, image_out, sat_thresh)
return image_out
