Pallete script can generate valid pallete json

py/pallete.py

@@ -1,5 +1,7 @@
 import argparse
 import cv2
+import numpy as np
+from math import floor
 from pallete_schema import PalleteSchema
 
 from os.path import isfile, realpath, basename, dirname, splitext, join
@@ -12,6 +14,9 @@ class Pallete :
 	input = ''
 	output = ''
 	image = None
+	selection = []
+	colors = []
+	i = 0
 
 	def __init__ (self, args) :
 		if isfile(args.input) :
@@ -19,16 +24,60 @@ class Pallete :
 		else :
 			print(f'File {self.input} does not exist')
 			exit(1)
+
 		self.set_output()
+		self.load()
+		self.display_ui()
+		self.write()
 
 	def set_output (self) :
 		dir = dirname(self.input)
 		stem = splitext(basename(self.input))[0]
+		name = basename(self.input)
+		print(f'Using image {name}')
 		self.output = join(dir, f'{stem}.json')
 		print(f'Writing to {stem}.json')
 
-	def process (self) :
-		image = cv2.imread(self.input)
+	def load (self) :
+		self.image = cv2.imread(self.input)
+
+	def display_ui (self) :
+		cv2.imshow('pallete', self.image)
+		cv2.namedWindow('pallete')
+		cv2.setMouseCallback('pallete', self.on_click)
+		cv2.waitKey(0)
+		cv2.destroyAllWindows()
+
+	def on_click (self, event, x, y, flags, param) :
+		if event == cv2.EVENT_LBUTTONDOWN:
+			#print(f'{x},{y}')
+			if len(self.selection) == 0 :
+				self.selection.append([x, y])
+			elif len(self.selection) == 1 :
+				self.selection.append([x, y])
+				self.process_color(self.selection)
+				self.selection = []
+
+	def process_color (self, selection) :
+		top_left = selection[0]
+		bottom_right = selection[1]
+		color_select = self.image[top_left[1]:bottom_right[1], top_left[0]:bottom_right[0]]
+		avg_color_per_row = np.average(color_select, axis=0)
+		avg_color = np.average(avg_color_per_row, axis=0)
+		int_color = []
+		for i in avg_color :
+			int_color.append( int( round(i) ) )
+		self.colors.append({
+			'name' : str(self.i),
+			'color' : int_color,
+			'space' : 'BGR'
+		})
+		print(f'Added {self.i} = {int_color}')
+		self.i += 1
+
+	def write (self) :
+		PalleteSchema(self.output, self.colors)
+
 
 if __name__ == "__main__" :
 	args = parser.parse_args()

py/pallete_schema.py

@@ -12,14 +12,17 @@ class PalleteSchema :
 				"color" : {
 					"type" : "array",
 					"items" : { "type" : "number" }
-				}
 				},
-			"required" : [ "name", "color" ]
+				"space" : { "type" : "string" }
+			},
+			"required" : [ "name", "color", "space" ]
 		}
 	}
-	def __init__ (self, file = None):
-		if file is not None:
+	def __init__ (self, file = None, obj = None):
+		if file is not None and obj is None:
 			self.parse_file(file)
+		else :
+			self.write(file, obj)
 
 	def parse_file (self, file) :
 		with open(file) as f :
@@ -30,3 +33,9 @@ class PalleteSchema :
 		obj = loads(jsonstr)
 		validate( instance = obj, schema = self.schema)
 		self.colors = obj
+
+	def write(self, filepath, obj) :
+		validate( instance = obj, schema = self.schema)
+		jsonstr = dumps(obj, indent = 4)
+		with open(filepath, 'w') as outfile :
+			outfile.write(jsonstr)

py/posterize.py

@@ -50,13 +50,20 @@ class Posterize:
 		self.original_colors = np.unique(reshaped, axis=0)
 		#print(self.original_colors)
 		for i in range(self.n_colors) :
-			mask = self.extract_color(self.image, self.original_colors[i])
+			mask = self.extract_color_mask(self.image, self.original_colors[i])
 			cv2.imwrite(f'{i}.png', mask)
 
-	def extract_color (self, image, color):
+	def extract_color_mask (self, image, color):
 		mask = cv2.inRange(image, color, color)
 		return cv2.bitwise_not(mask)
 
+	def convert_color (self, color, color_space_a, color_space_b) :
+		pixel = np.zeros([1, 1, 3], dtype=np.uint8)
+		pixel = cv2.cvtColor(pixel, color_space_a)
+		pixel[:] = color
+		cvt = cv2.cvtColor(pixel, color_space_b)
+		return cvt[0, 0]
+
 	def closest(self, colors, color):
 		colors = np.array(colors)
 		color = np.array(color)

py/test_pallete.json

@@ -1,14 +1,17 @@
 [
 	{ 
 		"name" : "red",
-		"color" : [255, 0, 0]
+		"color" : [255, 0, 0],
+		"space" : "RGB"
 	},
 	{ 
 		"name" : "green",
-		"color" : [0, 255, 0]
+		"color" : [0, 255, 0],
+		"space" : "RGB"
 	},
 	{ 
 		"name" : "blue",
-		"color" : [0, 0, 255]
+		"color" : [0, 0, 255],
+		"space" : "RGB"
 	}
 ]