Method of generating an image that shows an embroidery area in an embroidery frame for computerized machine embroidery

A method of generating an image that shows an embroidery area in an embroidery frame for computerized embroidery, said method comprising:

• acquiring a first image of a calibration board, the calibration board having a plurality of feature points that form a contour approximating an embroidery area defined by the embroidery frame;
• identifying the feature points of the calibration board in the first image to acquire a plurality of graphical feature points;
• calculating a plurality of control parameters based on the graphical feature points, the control parameters cooperatively defining a geometric curved surface that fits the graphical feature points and that includes a plurality of curved surface points;
• acquiring a second image in which the embroidery area of the embroidery frame is shown and which includes a plurality of image pixels;
• and
• performing image correction on the second image based on the geometric curved surface to generate a corrected image;
• wherein the corrected image corresponds to the embroidery area of the embroidery frame, and includes a plurality of pixels respectively corresponding to the curved surface points of the geometric curved surface;
• and
• wherein, for each of the pixels of the corrected image, a pixel value thereof is calculated based on at least one of the image pixels of the second image that is adjacent to a position corresponding to one of the curved surface points which corresponds to the pixel of the corrected image.