Processing Method and Mobile Device

A processing method, applied to a mobile device, the processing method comprising:

• receiving a photographing instruction;
• determining, through edge detection, four sides of a document image corresponding to a target document in a preview box of the mobile device;
• determining, based on the four sides, a first included angle corresponding to the document image, wherein the first included angle represents an inclination degree of the document image relative to the target document, and wherein the first included angle is positively correlated, with an inclination angle of an image plane of a camera relative to the target document;
• triggering the camera to take k pictures when the first included angle is grater than a preset threshold, wherein k≥two, and wherein k is a positive integer;
• applying image correction to the k pictures obtained through photographing;
• and
• outputting, in response to the photographing instruction, one picture obtained through image correction, wherein far-end content in the picture obtained through image correction is clearer than far-end content in the document image.

A mobile device, comprising:

• a user input apparatus configured to receive a photographing instruction;
• a camera coupled to the user input apparatus and configured to obtain a document image of a target document;
• and
• a processor coupled to the user input apparatus and the camera and configured to:
• determine, through edge detection, four sides of the document image corresponding to the target document in a preview box of the mobile device;
• determine, based on the four sides, a first included angle corresponding to the document image, wherein the first included angle represents an inclination degree of the document image relative to the target document, and wherein the first included angle is positively correlated with an inclination angle of an image plane of the camera relative to the target document;
• determine whether the first included angle is greater than a preset threshold;
• trigger the camera to reset a focus location in a direction of far-end content in the document image and take n pictures, wherein the first included angle is greater than the preset threshold, and wherein n is an integer greater than or equal to one;
• apply geometric correction to at least one of the n pictures obtained through photographing;
• and
• output, in response to the photographing instruction, one of the at least one picture to which geometric correction has been applied.

A mobile device, comprising:

• a user input apparatus configured to receive a photographing instruction;
• a camera coupled to the user input apparatus configured to obtain a document image of a target document;
• a processor coupled to the user input apparatus and the camera and configured to:
• determine, through edge detection, four sides of the document image corresponding to the target document in a preview box of the mobile device;
• determine, based on the four sides, a first included angle corresponding to the document image, wherein the first included angle represents an inclination degree of the document image relative to the target document, and wherein the first included angle is positively correlated with an inclination angle of an image plane of the camera relative to the target document;
• determine whether the first included angle is greater than a preset threshold;
• trigger the camera to take k pictures, wherein the first included angle is greater than the preset threshold, wherein k≥two, and wherein k is a positive integer;
• apply image correction to the k pictures;
• and
• output, in response to the photographing instruction, one picture obtained through the image correction, wherein far-end content in the picture obtained through image correction is clearer than far-end content in the document image.