Draws a line segment connecting two points

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

Input

• img Image.
• pt1 First point of the line segment [x1,y1].
• pt2 Second point of the line segment [x2,y2].

Output

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

Options

• Color 3-element floating-point vector specifying line color. default zeros
• Thickness Line thickness. 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.line draws the line segment between pt1 and pt2 points in the image. The line is clipped by the image boundaries. For non-antialiased lines with integer coordinates, the 8-connected or 4-connected Bresenham algorithm is used. Thick lines are drawn with rounding endings. Antialiased lines are drawn using Gaussian filtering.