how can i detect edge and eliminate it from face image ?

Hello, please some one tell me how can i detect edge from face image and than eliminate it for features point reduction ?

Answer 1

[yanqi liu]

clc; clear all; close all;
img = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/787205/image.png');
im = rgb2gray(img);
pointTracker = vision.PointTracker('MaxBidirectionalError', 2);
points = detectMinEigenFeatures(im);
figure; imshow(img, []);
hold on; plot(points);

ed = edge(im, 'sobel');
figure; imshow(ed, []);

ind = [];
wh = 3;
for i = 1 : length(points)
    try
        rc = round(points(i).Location);
        edi = ed(rc(2)-wh:rc(2)+wh,rc(1)-wh:rc(1)+wh);
        if any(edi(:))
            ind = [ind i];
        end
    catch
    end
end
points(ind) = [];
figure; imshow(img, []);
hold on; plot(points);