METHOD, APPARATUS AND STORAGE MEDIUM FOR DETECTING CARDIO, THORACIC AND DIAPHRAGM BORDERS

The present invention provides a method of detecting borders in a chest image. The method comprises calculating the gray level difference between neighboring pixels of the chest image to get a differential image; filtering the differential image to reduce noise and enhance the target; binarizing the filtered image; picking out the outside edges of the area with high gray level from the binarized image; and determining a final border from the edges according to the character of the border to be found. The present invention also provides an apparatus and a storage medium for implementing the above-mentioned method and a method and an apparatus for automatically measuring the Cardiothoracic Ratio of a chest image.