对python opencv 添加文字 cv2.putText 的各参数介绍

如下所示：

cv2.puttext(img, str(i), (123,456)), font, 2, (0,255,0), 3)

各参数依次是：图片，添加的文字，左上角坐标，字体，字体大小，颜色，字体粗细

其中字体可以选择

font_hershey_simplex
python: cv.font_hershey_simplex
normal size sans-serif font

font_hershey_plain
python: cv.font_hershey_plain
small size sans-serif font

font_hershey_duplex
python: cv.font_hershey_duplex
normal size sans-serif font (more complex than font_hershey_simplex)

font_hershey_complex
python: cv.font_hershey_complex
normal size serif font

font_hershey_triplex
python: cv.font_hershey_triplex
normal size serif font (more complex than font_hershey_complex)

font_hershey_complex_small
python: cv.font_hershey_complex_small
smaller version of font_hershey_complex

font_hershey_script_simplex
python: cv.font_hershey_script_simplex
hand-writing style font

font_hershey_script_complex
python: cv.font_hershey_script_complex
more complex variant of font_hershey_script_simplex

font_italic
python: cv.font_italic
flag for italic font

字体大小，数值越大，字体越大

字体粗细，越大越粗，数值表示线占有直径像素个数

void cv::puttext(
 inputoutputarray img,
 const string & text,
 point org,
 int  fontface,
 double fontscale,
 scalar color,
 int  thickness = 1,
 int  linetype = line_8,
 bool bottomleftorigin = false 
)  
python:
img =cv.puttext(img, text, org, fontface,fontscale, color[, thickness[, linetype[, bottomleftorigin]]])

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