Convert image pixels to xy-coordinates

Image OCR to extract points coordinates from the scanned image.

The provided source code gets an input image (black object pixels on white background, e.g. an scanned plot with black ink on a white paper). The output is xy-coordinates of all points/pixels in the image, therefore the image is converted to coordinates of points and it is possible for re-plotting the image of plot. In other words, the provided function is an OCR for scanned plot to extract the image points coordinates.
example 1:
Im = imread('./Images/Plot.png');
CoordinateMatrix = pic2points(Im);
scatter(CoordinateMatrix (:,1), CoordinateMatrix (:,2),'.');