OpenCV putText()换行符 [英] OpenCV putText() new line character

问题描述

我正在使用cv2.putText()在图像上绘制文本字符串.

I am using cv2.putText() to draw a text string on an image.

当我写:

cv2.putText(img, "This is \n some text", (50,50), cv2.FONT_HERSHEY_SIMPLEX, 1, 2)

图像上绘制的文字是:

This is ? some text

我希望文本会在新行中打印，因为\n是换行符的转义字符，但它会在图像上绘制?.

I was expecting the text to be printed in the new line as \n is an escape character for newline but it draws ? on the image instead.

为什么会这样?难道我做错了什么 ?

Why this is happening ? am I doing something wrong ?

推荐答案

不幸的是，putText无法正确处理\n符号.请参阅相关的拒绝拉取请求.您需要自己分割文本并进行几次putText调用，例如:

Unfortunately putText doesn't correctly handle \n symbols. See the relevant rejected pull request. You need to split your text yourself and make several putText calls, something like:

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)

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