Functions | |
| void | cv::alphamat::infoFlow (InputArray image, InputArray tmap, OutputArray result) |
| Compute alpha matte of an object in an image. | |
Detailed Description
Information Flow algorithm implementaton for alphamatting
Alpha matting is used to extract a foreground object with soft boundaries from a background image.
This module is dedicated to computing alpha matte of objects in images from a given input image and a greyscale trimap image that contains information about the foreground, background and unknown pixels. The unknown pixels are assumed to be a combination of foreground and background pixels. The algorithm uses a combination of multiple carefully defined pixels affinities to estimate the opacity of the foreground pixels in the unkown region.
The implementation is based on [aksoy2017designing].
This module was developed by Muskaan Kularia and Sunita Nayak as a project for Google Summer of Code 2019 (GSoC 19).
Function Documentation
◆ infoFlow()
| void cv::alphamat::infoFlow | ( | InputArray | image, |
| InputArray | tmap, | ||
| OutputArray | result | ||
| ) |
#include <opencv2/alphamat.hpp>
Compute alpha matte of an object in an image.
- Parameters
-
image Input RGB image tmap Input greyscale trimap image result Output alpha matte image
The function infoFlow performs alpha matting on a RGB image using a greyscale trimap image, and outputs a greyscale alpha matte image. The output alpha matte can be used to softly extract the foreground object from a background image. Examples can be found in the samples directory.
