Draws a simple, thick, or filled up-right rectangle

img = cv.rectangle(img, pt1, pt2)
img = cv.rectangle(img, rect)
[...] = cv.rectangle(..., 'OptionName', optionValue, ...)

Input

• img Image.
• pt1 Vertex of the rectangle [x1,y1].
• pt2 Vertex of the recangle opposite to pt1, [x2,y2].
• rect Alternative specification of the drawn rectangle [x,y,w,h].

Output

• img Output image, same size and type as input img.

Options

• Color Rectangle color or brightness (grayscale image). default zeros
• Thickness Thickness of lines that make up the rectangle. Negative values (like -1) or the string 'Filled', mean that the function has to draw a filled rectangle. default 1.
• LineType Type of the line boundary. One of:
  • 4 4-connected line
  • 8 8-connected line (default)
  • AA anti-aliased line
• Shift Number of fractional bits in the point coordinates. default 0

The function cv.rectangle draws a rectangle outline or a filled rectangle whose two opposite corners are pt1 and pt2, or [x,y] and [x+w-1,y+h-1] (top-left and bottom-right corners of rectange used in the second variant of the function).