8bits gray BMP rotation with pure C++

• For 8bits gray BMP image clockwise rotation between 0~360 degree

  • Without any CV API

  • Interpolation method is based on Nearest Neighbor

  • Procedure:

    • Generating a trigonometric functions list for reducing computing overhead

    • Computing the new image size

    • Mapping each point in new image back to original image (360 - withch the degree you want to rotate)

  • Example

    • Original image:

      

    • Rotation 279 degree: