Perspective Transform in node.js introduces a way to warp an image with 4 given coordinates, but is there a way to warp an image with more than 4 points?
Perhaps a relocation of pixels to the corresponding coordinates.
please, please, no useless screenshots of code, here, please. remove & replace with TEXT, thank you.
there’s OpenCV: cv::ThinPlateSplineShapeTransformer Class Reference
related thread: Thin plate spline warpImage produces only zeros
I’m sorry @berak I meant to relate it to the official document example here
let src = cv.imread('canvasInput');
let dst = new cv.Mat();
let dsize = new cv.Size(src.rows, src.cols);
// (data32F[0], data32F[1]) is the first point
// (data32F[2], data32F[3]) is the sescond point
// (data32F[4], data32F[5]) is the third point
// (data32F[6], data32F[7]) is the fourth point
let srcTri = cv.matFromArray(4, 1, cv.CV_32FC2, [56, 65, 368, 52, 28, 387, 389, 390]);
let dstTri = cv.matFromArray(4, 1, cv.CV_32FC2, [0, 0, 300, 0, 0, 300, 300, 300]);
let M = cv.getPerspectiveTransform(srcTri, dstTri);
// You can try more different parameters
cv.warpPerspective(src, dst, M, dsize, cv.INTER_LINEAR, cv.BORDER_CONSTANT, new cv.Scalar());
cv.imshow('canvasOutput', dst);
src.delete(); dst.delete(); M.delete(); srcTri.delete(); dstTri.delete();
@crackwitz Yes! I just found it too! 
but I guess it’s not supported in node.js 
Thanks for the help!
the “not supported” part may be easy to fix. AFAIK it requires whitelisting so that transpilation is even attempted. perhaps nobody has needed/tried it yet. perhaps you’ll get a better answer yet, or you could browse previous opencv.js questions, where I’m sure some of the plumbing is explained.
ThinPlateSplineShapeTransformer uses cv::remap() function. Focus on if you solve your problem with cv::remap()
see the reference code: