Function remap

pub fn remap(
    src: &impl GMatTraitConst,
    map1: &impl MatTraitConst,
    map2: &impl MatTraitConst,
    interpolation: i32,
    border_mode: i32,
    border_value: Scalar,
) -> Result<GMat>

Applies a generic geometrical transformation to an image.

The function remap transforms the source image using the specified map:

where values of pixels with non-integer coordinates are computed using one of available interpolation methods. and can be encoded as separate floating-point maps in and respectively, or interleaved floating-point maps of in , or fixed-point maps created by using convertMaps. The reason you might want to convert from floating to fixed-point representations of a map is that they can yield much faster (~2x) remapping operations. In the converted case, contains pairs (cvFloor(x), cvFloor(y)) and contains indices in a table of interpolation coefficients. Output image must be of the same size and depth as input one.

Note:

• Function textual ID is “org.opencv.core.transform.remap”
• Due to current implementation limitations the size of an input and output images should be less than 32767x32767.

Parameters

• src: Source image.
• map1: The first map of either (x,y) points or just x values having the type CV_16SC2, CV_32FC1, or CV_32FC2.
• map2: The second map of y values having the type CV_16UC1, CV_32FC1, or none (empty map if map1 is (x,y) points), respectively.
• interpolation: Interpolation method (see cv::InterpolationFlags). The methods [INTER_AREA] and [INTER_LINEAR_EXACT] are not supported by this function.
• borderMode: Pixel extrapolation method (see cv::BorderTypes). When borderMode=BORDER_TRANSPARENT, it means that the pixels in the destination image that corresponds to the “outliers” in the source image are not modified by the function.
• borderValue: Value used in case of a constant border. By default, it is 0.

C++ default parameters

• border_mode: BORDER_CONSTANT
• border_value: Scalar()