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from pathlib import Path
from PIL import Image, ImageDraw, ImageFont
class Annotator:
def __init__(self, im, line_width=None, font_size=None):
im = im if isinstance(im, Image.Image) else Image.fromarray(im)
self.im = im.copy()
self.draw = ImageDraw.Draw(self.im)
font = Path(__file__).parents[1].joinpath("resources/font.ttf")
self.font = ImageFont.truetype(
str(font), font_size or max(round(sum(self.im.size) / 2 * 0.035), 12)
)
self.lw = line_width or max(round(sum(im.size) / 2 * 0.003), 2) # line width
def insure(self, y1, x2, fh):
x_bias = 0
y_bias = 0
if y1 < 0:
y_bias = fh
if x2 >= self.im.size[0]:
x_bias = x2 - self.im.size[0]
return x_bias, y_bias
def box_label(
self, box, label="", color=(128, 128, 128), txt_color=(255, 255, 255)
):
# Add one xyxy box to image with label
self.draw.rectangle(box, width=self.lw, outline=color) # box
if label:
fh = (self.font.getbbox(label)[3] - self.font.getbbox(label)[1]) + 3
w = self.font.getlength(label) # text width
x_bias, y_bias = self.insure(box[1] - fh, box[0] + w + 1, fh)
self.draw.rectangle(
[
box[0] - x_bias,
box[1] + y_bias - fh,
box[0] - x_bias + w + 1,
box[1] + y_bias + 1,
],
fill=color,
)
self.draw.text(
(box[0] - x_bias, box[1] + y_bias - 1),
label,
fill=txt_color,
font=self.font,
anchor="ls",
)
def polygon_label(self):
pass
def result(self):
return self.im
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