Hello,
I used OpencCV stitching class to stitch these images, but the result contain black area. I don't want to crop the image to remove the black area because some image details will be missed. Is there any way ( function or algorithm) to reconstruct the image so that the black area will be filled with appropriate pixels ??
Regards,
i would try to use inpaint
( not on the whole image, but only the border regions ):
void doInpaint(Mat &img)
{
// find black region:
Mat gray; cvtColor(img,gray,COLOR_BGR2GRAY);
Mat mask = gray == 0;
// pre-fill black areas with mean color,
// for easier interpolation
Scalar m,s;
cv::meanStdDev(img, m, s, ~mask); // inverted mask !
img.setTo(m, mask);
inpaint(img,mask,img,30,INPAINT_TELEA);
}
void main()
{
int S = 30;
Mat img = imread("stich_inp.png");
// top
doInpaint(img(Rect(0,0,img.cols,S)));
// bottom
doInpaint(img(Rect(0,img.rows-S,img.cols,S)));
// left
doInpaint(img(Rect(0,0,S,img.rows)));
// right
doInpaint(img(Rect(img.cols-S,0,S,img.rows)));
//
imshow("final", img);
imwrite("final.png", img);
waitKey();
}
@berak You can also create the mask based on the channel 0, no? But the result is ugly... isn't it better to cut the black part so you'll have a little smaller image?
"You can also create the mask based on the channel 0" - that would only give you "not blue" , imho better from grayscale.
"isn't it better to cut the black part so you'll have a little smaller image" - that would have been my 1st idea, too, but she kinda wanted to avoid that explicitly, no ?
mask is 1-channel 8-bit, while src is 1 or 3 channels, so I suppose it is doing the inpainting on all the channels...
Asked: 2015-10-20 01:00:02 -0600
Seen: 1,050 times
Last updated: Oct 20 '15
inpaint() might be helpful
Thanks, i will try it.
how can i paint just the black area around my image??
You do a mask of the black area (I suppose that everything is 0 there); see threshold, or maybe floodfill with seeds from the 4 corners of the stitched image
you mean the mask ?
I test this example link text its work fine but i want it to paint the black area without using the white painting ??