def calculate_hist_and_id(path, t, flag):
"""
This is a modified trusty hist function
"""
try:
image = Image.open(path)
except IOError:
print "Error Opening Image file (PIL)"
try:
hist = image.histogram()
except:
print "Unexpected error:", sys.exc_info()
exit(0)
hist16bin = []
start = 0
end = 16
bin_count = 0
hist16bin.append(0)
for i in range(len(hist)):
if i % 16 == 0:
start = i
end = start + 16
if bin_count == 15:
break
bin_count += 1
hist16bin.append(0)
else:
hist16bin[bin_count] += hist[i]
# Now we put the histogram in the database
if flag == True:
normal = Histograms()
normal.bin0 = hist16bin[0]
normal.bin1 = hist16bin[1]
normal.bin2 = hist16bin[2]
normal.bin3 = hist16bin[3]
normal.bin4 = hist16bin[4]
normal.bin5 = hist16bin[5]
normal.bin6 = hist16bin[6]
normal.bin7 = hist16bin[7]
normal.bin8 = hist16bin[8]
normal.bin9 = hist16bin[9]
normal.bin10 = hist16bin[10]
normal.bin11 = hist16bin[11]
normal.bin12 = hist16bin[12]
normal.bin13 = hist16bin[13]
normal.bin14 = hist16bin[14]
normal.bin15 = hist16bin[15]
normal.hist_type = t
normal.is_video = 'y'
normal.save()
im = Histograms.objects.all()
id = 0
l = len(im)
if len(im) > 0:
id = im[l - 1].id
return [id, hist16bin]
def calculate_hist(path, t, flag):
""" Returns a length 16 list
The third parameter is a flag. It says that if it's set
to false, we should not put the calcuated histograms in the
database. And we should if it's true. This came about because
of the fact that search image histograms do not need to be put in the database
while uploaded images do. And since I use the same function to calculate the
histograms there is no need to rewrite code, just set a flag."""
try:
image = Image.open(path)
except IOError:
print "Error Opening Image file (PIL)"
#print "Format: ", image.format, " Size: ", image.size, " Mode: ", image.mode
# This is so neat! A histogram method! Hopefully the professor doesn't disapprove.
#print "Histogram: ", image.histogram()
# However, we must make it a 16 bin historgram.
try:
hist = image.histogram()
except:
print "Unexpected error:", sys.exc_info()
exit(0)
hist16bin = []
start = 0
end = 16
bin_count = 0
hist16bin.append(0)
for i in range(len(hist)):
if i % 16 == 0:
start = i
end = start + 16
if bin_count == 15:
break
bin_count += 1
hist16bin.append(0)
else:
hist16bin[bin_count] += hist[i]
print "\n\n"
print "16 Bin histogram: ", hist16bin
print
print "Size: ", len(hist16bin)
print "Original Size: ", len(hist)
# Now we put the histogram in the database
if flag == True:
normal = Histograms()
normal.bin0 = hist16bin[0]
normal.bin1 = hist16bin[1]
normal.bin2 = hist16bin[2]
normal.bin3 = hist16bin[3]
normal.bin4 = hist16bin[4]
normal.bin5 = hist16bin[5]
normal.bin6 = hist16bin[6]
normal.bin7 = hist16bin[7]
normal.bin8 = hist16bin[8]
normal.bin9 = hist16bin[9]
normal.bin10 = hist16bin[10]
normal.bin11 = hist16bin[11]
normal.bin12 = hist16bin[12]
normal.bin13 = hist16bin[13]
normal.bin14 = hist16bin[14]
normal.bin15 = hist16bin[15]
normal.hist_type = t
normal.save()
return hist16bin