53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2018 Slightech Co., Ltd. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# pylint: disable=missing-docstring
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import cv2
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FONT_FACE = cv2.FONT_HERSHEY_SIMPLEX
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FONT_SCALE = 1
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FONT_COLOR = (255, 255, 255)
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THICKNESS = 1
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class Gravity(object): # pylint: disable=no-init
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TOP_LEFT = 1
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TOP_RIGHT = 2
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BOTTOM_LEFT = 3
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BOTTOM_RIGHT = 4
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def draw_text(img, text, gravity, margin=10, offset_x=0, offset_y=0):
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h, w = img.shape[:2] # pylint: disable=invalid-name
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# getTextSize, result: ((width, height), baseline)
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x, y = cv2.getTextSize(text, FONT_FACE, FONT_SCALE, THICKNESS)[0]
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org = {
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Gravity.TOP_LEFT: (margin, margin + y),
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Gravity.TOP_RIGHT: (w - margin - x, margin + y),
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Gravity.BOTTOM_LEFT: (margin, h - margin),
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Gravity.BOTTOM_RIGHT: (w - margin - x, h - margin),
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}.get(gravity, (margin, margin + y))
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org = (org[0] + offset_x, org[1] + offset_y)
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# putText(img, text, org, fontFace, fontScale, color, thickness, lineType)
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cv2.putText(img, text, org, FONT_FACE, FONT_SCALE,
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FONT_COLOR, THICKNESS, cv2.LINE_AA)
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