Image information extraction method and device and medium

The invention discloses an image information extraction method and device and a medium, and the method comprises the steps: receiving an image, finding the position of text information in the image through a text detection algorithm DB capable of differential binarization, and forming a bounding box around the text information; taking a normal vector from the long side of the bounding box, detecting an included angle between the normal vector and the vertical direction, and rotating the bounding box according to the included angle when the included angle is greater than a preset angle value; finding an anchor point in the image according to a pre-input template, and performing affine transformation correction according to the anchor point; classifying the text information in the bounding box according to the template, and identifying and extracting the text information; text information which is difficult to recognize is extracted by using a regular expression. The accuracy of character recognition is improve