Image Distortion Correction Method and Apparatus

An image distortion correction method, comprising:

• shooting a a nth frame of an image at a first angle deviating from a vertical direction, wherein a projection of a distance value of a first pixel point of the nth frame of the image to an optical center onto an optical axis direction is a first distance value, wherein a projection of a distance value of an ith pixel point of the nth frame of the image to the optical center onto the optical axis direction is a second distance value, and wherein the first pixel point is a pixel point at a lowest end of the nth frame of the image;
• obtaining a third distance value and a fourth distance value, wherein the third distance value is a projection of a pixel point at an uppermost end of a first frame of the image to the optical center onto the optical axis direction when the first frame of the image is shot at a second angle deviating from the vertical direction, wherein the fourth distance value is a projection of a pixel point at a lowest end of the first frame of the image to the optical center onto the optical axis direction when the first frame of image is shot at the second angle deviating from the vertical direction, wherein the second angle is less than the first angle, and wherein the first angle and the second angle are angles when images are shot at a same side in the vertical direction;
• obtaining a correction coefficient of the pixel point of the nth frame of the image according to the first distance value, the second distance value, the third distance value, and the fourth distance value;
• and correcting a location of the pixel point of the nth frame of the image according to the correction coefficient using a location of an ith pixel point of the first frame of the image as a reference, wherein a value of n is 2 to N, and wherein a value of N is a positive integer greater than or equal to 2.

An image distortion correction apparatus, comprising:

• a camera configured to:
• shoot an nth frame of an image at a first angle deviating from a vertical direction;
• and
• shoot a first frame of the image at a second angle deviating from the vertical direction, wherein the second angle is less than the first angle, and wherein the first angle and the second angle are angles when images are shot at a same side in the vertical direction;
• and
• a processor coupled to the camera and configured to:
• measure a first distance value, a second distance value, a third distance value, and a fourth distance value, wherein the first distance value is a projection of a distance value of a first pixel point of the nth frame of the image to an optical center onto an optical axis direction when the camera shoots the nth frame of the image at the first angle deviating from the vertical direction, wherein the second distance value is a projection of a distance value of an ith pixel point of the nth frame of the image to the optical center onto the optical axis direction when the camera shoots the nth frame of the image at the first angle deviating from the vertical direction, wherein the first pixel point is a pixel point at a. lowest end of the nth frame of the image, wherein the third distance value is a projection of a pixel point at an uppermost end of the first frame of the image to the optical center onto the optical axis direction when the camera shoots the first frame of the image at the second angle deviating from the vertical direction, and Therein the fourth distance value is a projection of a pixel point at a lowest end of the first frame of the image to the optical. center onto the optical axis direction when the camera shoots the first frame of image at the second angle deviating from the vertical direction;
• obtain a correction coefficient of the ith pixel point of the nth frame of the image according to the first distance value, the second distance value, the third distance value, and the fourth distance value;
• and
• correct a location of the pixel point of the nth frame of the image according to the correction coefficient obtained using a location of an ith pixel point of the first frame of image as a reference, wherein a value of n is 2 to N, and wherein a value of N is a positive integer greater than or equal to 2.

A computer readable storage medium storing one or more programs, wherein the one or more programs comprise an instruction, wherein when a portable electronic device comprising a display and a plurality of application programs executes the instruction, the portable electronic device performs a method that comprises:

• shooting an nth frame of an image at a first angle deviating from a vertical direction, wherein a projection of a distance value of a first pixel point of the nth frame of the image to an optical center onto an optical axis direction is a first distance value, wherein a projection of a distance value of an ith pixel point of the nth frame of the image to the optical center onto the optical axis direction is a second distance value, and wherein the first pixel point is a pixel point at a lowest end of the nth frame of the image;
• obtaining a third distance value and a fourth distance value, wherein the third distance value is a projection of a pixel point at an uppermost end of a first frame of the image to the optical center onto the optical axis direction when the first frame of the image is shot at a second angle deviating from the vertical direction, wherein the fourth distance value is a projection of a pixel point at a lowest end of the first frame of the image to the optical center onto the optical axis direction when the first frame of image is shot at the second angle deviating from the vertical direction, wherein the second angle is less than the first angle, and wherein the first angle and the second angle are angles when images are shot at a same side in the vertical direction;
• obtaining a correction coefficient of the ith pixel point of the nth frame of the image according to the first distance value, the second distance value, the third distance value, and the fourth distance value;
• and
• correcting a location of the ith pixel point of the nth frame of the image according to the correction coefficient using a location of an ith pixel point of the first frame of the image as a reference, wherein a value of n is 2 to N, wherein a value of N is a positive integer greater than or equal to 2, and
• wherein the display comprises a touch-sensitive surface and a display screen.