Image processing method and image processing apparatus for transforming objects within an image

An image processing apparatus, comprising:

• a memory;
• and
• a processor coupled to the memory, which is configured to execute the image processing method comprising:
• performing line detection on a boundary of an object in a scene image to obtain a plurality of candidate lines;
• taking one of the plurality of the candidate lines, which has the largest number of pixels overlapping with the boundary, as a first reference line;
• generating a minimum bounding rectangle of the object in the scene image;
• generating a transformed area, wherein each of four vertexes of the minimum bounding rectangle is on one of four sidelines of the transformed area, a slope of a first sideline and a slope of a second sideline opposite to the first sideline of the transformed area are determined by a slope of the first reference line, and a slope of a third sideline and a slope of a fourth sideline opposite to the third sideline of the transformed area are determined by a slope of an exterior angle bisector of the first sideline and the second sideline, wherein the generating the transformed area comprises:
• generating the first sideline passing through a first vertex of the minimum bounding rectangle and the second sideline passing through a second vertex of the minimum bounding rectangle, wherein an angle where the first vertex is located and an angle where the second vertex is located are opposite angles, a difference between the slope of the first sideline and the slope of the first reference line and a difference between the slope of the second sideline and the slope of the first reference line are within a first preset range;
• generating a second reference line passing through a center point of the minimum bounding rectangle, wherein a slope of the second reference line is the slope of the external angle bisector of the first sideline and the second sideline;
• generating the third sideline passing through a third vertex of the minimum bounding rectangle and the fourth sideline passing through a fourth vertex of the minimum bounding rectangle, wherein an angle where the third vertex is located and an angle where the fourth vertex is located are opposite angles, a difference between the slope of the third sideline and the slope of the second reference line and a difference between the slope of the fourth sideline and the slope of the second reference line are within a second preset range;
• and
• generating the transformed area according to the first sideline, the second sideline, the third sideline and the fourth sideline;
• transforming a preset image into the transformed area to generate a transformed image;
• and
• overlaying the object with the transformed image to update the scene image.

A non-transitory computer readable storage medium which stores computer instructions that, when executed by a processor, implement the image processing method comprising:

• performing line detection on a boundary of an object in a scene image to obtain a plurality of candidate lines;
• taking one of the plurality of the candidate lines, which has the largest number of pixels overlapping with the boundary, as a first reference line;
• generating a minimum bounding rectangle of the object in the scene image;
• generating a transformed area, wherein each of four vertexes of the minimum bounding rectangle is on one of four sidelines of the transformed area, a slope of a first sideline and a slope of a second sideline opposite to the first sideline of the transformed area are determined by a slope of the first reference line, and a slope of a third sideline and a slope of a fourth sideline opposite to the third sideline of the transformed area are determined by a slope of an exterior angle bisector of the first sideline and the second sideline, wherein the generating the transformed area comprises:
• generating the first sideline passing through a first vertex of the minimum bounding rectangle and the second sideline passing through a second vertex of the minimum bounding rectangle, wherein an angle where the first vertex is located and an angle where the second vertex is located are opposite angles, a difference between the slope of the first sideline and the slope of the first reference line and a difference between the slope of the second sideline and the slope of the first reference line are within a first preset range;
• generating a second reference line passing through a center point of the minimum bounding rectangle, wherein a slope of the second reference line is the slope of the external angle bisector of the first sideline and the second sideline;
• generating the third sideline passing through a third vertex of the minimum bounding rectangle and the fourth sideline passing through a fourth vertex of the minimum bounding rectangle, wherein an angle where the third vertex is located and an angle where the fourth vertex is located are opposite angles, a difference between the slope of the third sideline and the slope of the second reference line and a difference between the slope of the fourth sideline and the slope of the second reference line are within a second preset range;
• and
• generating the transformed area according to the first sideline, the second sideline, the third sideline and the fourth sideline;
• transforming a preset image into the transformed area to generate a transformed image;
• and
• overlaying the object with the transformed image to update the scene image.