opencv函数解析

1.rectangle(...)
rectangle(img, pt1, pt2, color[, thickness[, lineType[, shift]]]) -> img
. @brief Draws a simple, thick, or filled up-right rectangle.
.
. The function cv::rectangle draws a rectangle outline or a filled rectangle whose two opposite corners
. are pt1 and pt2.
.
. @param img Image.
. @param pt1 Vertex of the rectangle.
. @param pt2 Vertex of the rectangle opposite to pt1 .
. @param color Rectangle color or brightness (grayscale image).
. @param thickness Thickness of lines that make up the rectangle. Negative values, like #FILLED,
. mean that the function has to draw a filled rectangle.
. @param lineType Type of the line. See #LineTypes
. @param shift Number of fractional bits in the point coordinates.

2.putText(...)

putText(img, text, org, fontFace, fontScale, color[, thickness[, lineType[, bottomLeftOrigin]]]) -> img
. @brief Draws a text string.
.
. The function cv::putText renders the specified text string in the image. Symbols that cannot be rendered
. using the specified font are replaced by question marks. See #getTextSize for a text rendering code
. example.
.
. @param img Image.
. @param text Text string to be drawn.
. @param org Bottom-left corner of the text string in the image.
. @param fontFace Font type, see #HersheyFonts.
. @param fontScale Font scale factor that is multiplied by the font-specific base size.
. @param color Text color.
. @param thickness Thickness of the lines used to draw a text.
. @param lineType Line type. See #LineTypes
. @param bottomLeftOrigin When true, the image data origin is at the bottom-left corner. Otherwise,
. it is at the top-left corner.

3.