Python OpenCV putText() 换行符
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OpenCV putText() new line character
提问by Vipul
I am using cv2.putText() to draw a text string on an image.
我正在使用 cv2.putText() 在图像上绘制文本字符串。
When I write:
当我写：
cv2.putText(img, "This is \n some text", (50,50), cv2.FONT_HERSHEY_SIMPLEX, 1, 2)
The text drawn on the image is:
图片上绘制的文字是：
This is ? some text
This is ? some text
I was expecting the text to be printed in the new line as \nis an escape character for newline but it draws ?on the image instead.
我希望文本作为\n换行符的转义字符打印在新行中，但它?改为在图像上绘制。
Why this is happening ? am I doing something wrong ?
为什么会这样？难道我做错了什么 ？
采纳答案by elyase
Unfortunately putTextdoesn't correctly handle \nsymbols. See the relevant rejected pull request. You need to split your text yourself and make several putTextcalls, something like:
不幸的putText是不能正确处理\n符号。请参阅相关的拒绝拉取请求。您需要自己拆分文本并进行多次putText调用，例如：
text = "This is \n some text"
y0, dy = 50, 4
for i, line in enumerate(text.split('\n')):
y = y0 + i*dy
cv2.putText(img, line, (50, y ), cv2.FONT_HERSHEY_SIMPLEX, 1, 2)
