def test_lightness(self):
a = Color("#abc")
l = a.hls.l
b = a.lighter()
assert a.hls.l < b.hls.l
assert a.hls.l == l
b = a.darker()
assert a.hls.l > b.hls.l
assert a.hls.l == l
def test_hsl(self):
c = Color("#abc")
self.assertAlmostEqual(c.hsl, (0.5833333333333334,
0.25,
0.7333333333333334))
assert c.hex == "#aabbcc"
# Test HSL is relative to RGB working space
a = Color("#abc", workspace="srgb")
b = Color("#abc", workspace="linear_rgb")
self.assertAlmostEqual(a.hsl, b.hsl)
def test_alpha(self):
a = Color("#abc", a=0.5)
assert a.hex == "#aabbcc"
assert a.css == "rgba(170, 187, 204, 0.50)"
a.rgb.r = 0.3
assert a.css == "rgba(77, 187, 204, 0.50)"
a.a = 1
assert a.css == "rgb(77, 187, 204)"
a = Color("#abc", a=0.5, workspace="linear_rgb")
assert a.hex == "#aabbcc"
assert a.css == 'rgba(213, 222, 231, 0.50)'
def test_rgb(self):
c = Color("#abc")
# Test value iteration
assert tuple(c.rgb8) == (170, 187, 204)
# Test key iteration / access by key
self.assertAlmostEqual(
dict(c.rgb8),
{'r': 170.0, 'b': 204.0, 'g': 187.0})
# Test access by attribute
assert c.rgb8.r == 170
assert c.rgb8.g == 187
assert c.rgb8.b == 204
# Check floating RGB
self.assertAlmostEqual(
c.rgb,
(0.6666666666666666, 0.7333333333333333, 0.8))
self.assertAlmostEqual(
dict(c.rgb),
{'r': 0.6666666666666666, 'g': 0.7333333333333333, 'b': 0.8})
assert c.hex == "#aabbcc"
def test_contrast(self):
# Test WCAG luminance ratio contrast test
a = Color("#000")
b = Color("#111")
c = Color("#aaa")
assert not a.w3_contrast_test(b)
assert not a.w3_contrast_test(c)
assert c.w3_contrast_test(a)
def openToHsv(file):
img = Image.open(file)
arr = numpy.zeros(img.size+(3,), dtype=float)
for v in each_pixel(img):
try:
color = Color(rgb8=img.getpixel(v))
arr[v] = tuple(color.hls)
except ValueError as e:
print v,":",img.getpixel(v)
raise e
return arr
def get_colors(self,
image_path,
num,
return_color_counts=False,
return_image=False,
use_logs=False):
if num < 2:
print("The image must have at least 2 colors.")
return
image = cv2.imread(image_path, cv2.IMREAD_COLOR)
(h, w) = image.shape[:2]
# Convert color spaces
image = cv2.cvtColor(image, cv2.COLOR_BGR2LAB)
image = image.reshape((image.shape[0] * image.shape[1], 3))
clusters = MiniBatchKMeans(n_clusters=num)
labels = clusters.fit_predict(image)
res = clusters.cluster_centers_.astype("uint8")[labels]
# To get the colors back to RGB, we must convert to an image and extract the colors
res = res.reshape((h, w, 3))
res = cv2.cvtColor(res, cv2.COLOR_LAB2BGR)
if return_image:
res_image = res
res = res.reshape((h * w, 3))
res_colors = []
color_counts = []
for color in res:
string_color = generate_hex(color, bgr=True)
if string_color not in res_colors:
res_colors.append(string_color)
color_counts.append(0)
else:
color_counts[res_colors.index(string_color)] += 1
palette = Palette()
for i, color in enumerate(res_colors):
palette.add(Color(color, color_counts[i]))
self.scheme_cache = palette
# Oh no
if return_image:
if return_color_counts:
return palette, color_counts, res_image
return palette, res_image
if return_color_counts:
return palette, color_counts
return palette
def test_srgb(self):
# Default workspace is sRGB
c = Color("#abc")
self.assertAlmostEqual(c.rgb, c.srgb)
self.assertAlmostEqual(c.srgb,
(0.6666666666666667,
0.7333333333333333,
0.8))
self.assertAlmostEqual(c.linear_rgb,
(0.4019777798321958,
0.4969329950608704,
0.6038273388553378))
# Compare to linear RGB
c = Color("#abc", workspace="linear_rgb")
self.assertAlmostEqual(c.rgb, c.linear_rgb)
self.assertAlmostEqual(c.linear_rgb,
(0.6666666666666667,
0.7333333333333333,
0.8))
self.assertAlmostEqual(c.srgb,
(0.8360069706715786,
0.8721031439596221,
0.9063317533440594))
def convert(self):
c = canvas = Drawing()
img = self._image
mean, std = img[:,:,1].mean(), img[:,:,1].std()
for x,y in product(xrange(self.width), xrange(self.height)):
hue, lum, sat = self._pixelval(x,y)
perimeter = self.peri(lum, mean, std)
color = Color.from_hls(hue, lum, sat)
if perimeter > self._size_threshold:
shape = c.circle(
center = (
(self._size_of_pixel + self._d_pixel) * x,
(self._size_of_pixel + self._d_pixel) * y),
r = self._size_of_pixel * perimeter / 2,
fill = rgb(*color.rgb8))
canvas.add(shape)
return canvas
sorted_dg = sorted(degrees.items(), key=operator.itemgetter(1))
delta4 = 0.99/float(counts[0])
delta3 = 0.95/float(counts[1])
delta2 = 0.96/float(counts[2])
delta1 = 0.97/float(counts[3])
delta0 = 1/float(counts[4])
offset0 = 0
offset1 = 0
offset2 = 0
offset3 = 0
offset4 = 0
a0_color = Color('#ffee00')
a2_color = Color('#5a004c')
a3_color = Color('#336699')
# place nodes on axes
print("place nodes on axes")
for n,d in sorted_dg:
nd = Node(n)
if d >= bins[0] and d < bins[1]:
offset4 += delta4
axis4.add_node(nd, offset4)
if d >= bins[1] and d < bins[2]:
offset3 += delta3
axis3.add_node(nd, offset3)
def export_excel(story_map, file_name, title=None):
colors = Story.objects.filter(
theme__story_map=story_map
).order_by('color').values("color")
# we could use distinct here but as we want to support
# sqlite, we use list(set(x)) instead.
color_list = [c['color'] for c in colors]
color_list = list(set(color_list))
file_name = u"{0}.xls".format(slugify(file_name))
response = HttpResponse(content_type='application/vnd.ms-excel')
response['Content-Disposition'] = \
'attachment; filename="{0}"'.format(file_name)
book = Workbook()
i = 0
ix = 0x21
for c in color_list:
add_palette_colour("board_color_{0}".format(i), ix)
color = Color(c)
book.set_colour_RGB(ix,
int(color.r * 255),
int(color.g * 255),
int(color.b * 255))
ix += 1
i += 1
header_style = easyxf(
'font: name Arial, bold True, height 250;'
'borders: bottom thin;'
'alignment: horizontal center;'
'pattern: pattern solid, fore_colour gray25;',
)
sheet1 = book.add_sheet('Board')
row = 0
row_head = sheet1.row(row)
themes = story_map.themes.all()
index = 1
for theme in themes:
row_head.write(index, theme.name, header_style)
sheet1.col(index).width = 5000
index += 1
phase_style = easyxf(
'alignment: horizontal center, vertical center;'
'font: bold True;'
'border: right thin, top thin;'
'pattern: pattern solid, fore_colour gray25;'
)
row += 1
for phase in story_map.phases.all():
max_stories = 1
index = 1
for theme in themes:
stories = phase.stories.filter(theme=theme).all()
row_index = row
for story in stories:
color = "board_color_{0}".format(color_list.index(story.color))
style = easyxf(
'alignment: wrap True, horizontal center, vertical top;'
'border: left thin, top thin, right thin, bottom thin;'
'pattern: pattern solid, fore_colour {0};'.format(color)
)
sheet1.write(row_index, index, story.title, style)
row_index += 1
index += 1
max_stories = max(max_stories, len(stories))
index = 0
# write theme name
sheet1.write_merge(row, (row + max_stories - 1), index, index,
phase.name, phase_style)
row += max_stories
book.save(response)
return response
sorted_dg = sorted(degrees.items(), key=operator.itemgetter(1))
delta4 = 0.99/float(counts[0])
delta3 = 0.95/float(counts[1])
delta2 = 0.96/float(counts[2])
delta1 = 0.97/float(counts[3])
delta0 = 1/float(counts[4])
offset0 = 0
offset1 = 0
offset2 = 0
offset3 = 0
offset4 = 0
a0_color = Color('#ffee00')
a2_color = Color('#5a004c')
a3_color = Color('#336699')
# place nodes on axes
print "place nodes on axes"
for n,d in sorted_dg:
nd = Node(n)
if d >= bins[0] and d < bins[1]:
offset4 += delta4
axis4.add_node(nd, offset4)
if d >= bins[1] and d < bins[2]:
offset3 += delta3
axis3.add_node(nd, offset3)
return res_colors, color_counts, res_image
return res_colors, res_image
if return_color_counts:
return res_colors, color_counts
return res_colors
def get_image_data_from_url(self, url):
req = urllib.urlopen(url)
return np.asarray(bytearray(req.read()), dtype=np.uint8)
if __name__ == "__main__":
print("Running...")
extractor = Extractor()
colors, counts, image = extractor.get_colors(
extractor.get_image_data_from_url(image_url),
colors,
return_color_counts=True,
return_image=True,
use_logs=True)
(h, w) = image.shape[:2]
if colors is not None:
print("Resulting colors:")
palette = Palette([])
for i, color in enumerate(colors):
palette.add(Color(color, counts[i]))
palette.sort(sort_palette_by)
display(palette.get_palette_html())
cv2_imshow(image)