opencv之圖像畸變矯正

目錄

• 前言
• 函數
• 代碼測試
• 參考

前言

圖像的畸變矯正需要相機的內參和畸變系數, 在opencv中, 有以下兩個函數可以實現:

• undistort()函數
• initUndistortRectifyMap() + remap()函數

函數

• undistort

void undistort(InputArray src, OutputArray dst, InputArray cameraMatrix, InputArray distCoeffs, InputArray newCameraMatrix=noArray() )

• initUndistortRectifyMap

void initUndistortRectifyMap(InputArray cameraMatrix, InputArray distCoeffs, InputArray R, InputArray newCameraMatrix, Size size, int m1type, OutputArray map1, OutputArray map2)

• remap

void remap(InputArray src, OutputArray dst, InputArray map1, InputArray map2, int interpolation, int borderMode=BORDER_CONSTANT, const Scalar& borderValue=Scalar())

remap有以下幾種插值的方法:

interpolation method:

• INTER_NEAREST - a nearest-neighbor interpolation
• INTER_LINEAR - a bilinear interpolation (used by default)
• INTER_AREA - resampling using pixel area relation. It may be a preferred method for image decimation, as it gives moire’-free results. But when the image is zoomed, it is similar to the INTER_NEAREST method.
• INTER_CUBIC - a bicubic interpolation over 4x4 pixel neighborhood
• INTER_LANCZOS4 - a Lanczos interpolation over 8x8 pixel neighborhood

代碼測試

未完成

參考

• https://docs.opencv.org/2.4/modules/imgproc/doc/geometric_transformations.html#undistort

• https://answers.opencv.org/question/42808/difference-between-undistort-and-initundistortrectifymapremap/