I have extracted the strokes data from the QuickDraw Dataset (JSON format), but I have no idea on how to plot it in Python. I tried several times, but doesn't work at all. I need help on plotting the strokes in Python. The following is my code for extraction strokes data:
import json
file = open(filepath)
lines = file.readlines()
data = json.loads(lines[0])
strokes = data['drawing']
x = strokes[0][0]
y = strokes[0][1]
The following text is the first line of the datafile:
{"word":"airplane","countrycode":"US","timestamp":"2017-03-08 21:12:07.26604 UTC","recognized":true,"key_id":"5152802093400064","drawing":[[[167,109,80,69,58,31,57,117,99,52,30,6,1,2,66,98,253,254,246,182,165],[140,194,227,232,229,229,206,124,123,149,157,159,153,110,82,77,74,109,121,127,120]],[[207,207,210,221,238],[74,103,114,128,135]],[[119,107,76,70,49,39,60,93],[72,41,3,0,1,5,38,70]]]}
In addition to Swati's answer, there's a quickdraw python package that makes this easy:
from quickdraw import QuickDrawData
qd = QuickDrawData()
anvil = qd.get_drawing("anvil")
anvil.image.show()
If you want to do it manually, you can zip() the all the x values and the y values and render that (using PIL or anything else):
import json
from PIL import Image, ImageDraw
# read ndjson lines
lines = open('full_simplified_cat.ndjson','r').readlines()
# grab the first line, JSON parse it and fetch the 'drawing' array
raw_drawing = json.loads(lines[0])['drawing']
print('before',raw_drawing)
# zip x,y coordinates for each point in every polyline
polylines = (zip(polyline[0], polyline[1]) for polyline in raw_drawing)
# notice how the data is shuffled to (x1,y1),(x2,y2) order
print('after',polylines)
# make a new image
pil_img = Image.new("RGB", (240, 270), (255,255,255))
# get a drawing context
d = ImageDraw.Draw(pil_img)
# render each polyline
for polyline in polylines:
d.line(polyline,fill=(0, 0, 0),width=3)
# display image
pil_img.show()