gen_grid_rectification_mapT_gen_grid_rectification_mapGenGridRectificationMapGenGridRectificationMapgen_grid_rectification_map (算子)

名称

gen_grid_rectification_mapT_gen_grid_rectification_mapGenGridRectificationMapGenGridRectificationMapgen_grid_rectification_map — 基于规则网格的点计算畸变图像和校正图像之间的映射。

签名

gen_grid_rectification_map(Image, ConnectingLines : Map, Meshes : GridSpacing, Rotation, Row, Column, MapType : )

描述

gen_grid_rectification_mapgen_grid_rectification_mapGenGridRectificationMapGenGridRectificationMapGenGridRectificationMapgen_grid_rectification_map calculates the mapping between the grid points (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn), which have been actually detected in the distorted image ImageImageImageImageimageimage (typically using saddle_points_sub_pixsaddle_points_sub_pixSaddlePointsSubPixSaddlePointsSubPixSaddlePointsSubPixsaddle_points_sub_pix), and the corresponding grid points of the ideal regular point grid. First, all paths that lead from their initial point via exactly four different connecting lines back to the initial point are assembled from the grid points (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn) and the connecting lines ConnectingLinesConnectingLinesConnectingLinesConnectingLinesconnectingLinesconnecting_lines (detected by connect_grid_pointsconnect_grid_pointsConnectGridPointsConnectGridPointsConnectGridPointsconnect_grid_points). In case that the input of grid points (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn) and of connecting lines ConnectingLinesConnectingLinesConnectingLinesConnectingLinesconnectingLinesconnecting_lines was meaningful, one such 'mesh' corresponds to exactly one grid cell in the rectification grid. Afterwards, the meshes are combined to the point grid. According to the value of RotationRotationRotationRotationrotationrotation, the point grid is rotated by 0, 90, 180 or 270 degrees. Note that the point grid does not necessarily have the correct orientation. When passing 'auto'"auto""auto""auto""auto""auto" in RotationRotationRotationRotationrotationrotation, the point grid is rotated such that the black circular mark in the rectification grid is positioned to the left of the white one (see also create_rectification_gridcreate_rectification_gridCreateRectificationGridCreateRectificationGridCreateRectificationGridcreate_rectification_grid). Finally, the mapping MapMapMapMapmapmap between the distorted image and the rectified image is calculated by interpolation between the grid points. Each grid cell, for which the coordinates (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn) of all four corner points are known, is projected onto a square of GridSpacingGridSpacingGridSpacingGridSpacinggridSpacinggrid_spacing x GridSpacingGridSpacingGridSpacingGridSpacinggridSpacinggrid_spacing pixels.

MapTypeMapTypeMapTypeMapTypemapTypemap_type is used to specify the type of the output MapMapMapMapmapmap. If 'bilinear'"bilinear""bilinear""bilinear""bilinear""bilinear" interpolation is chosen, MapMapMapMapmapmap consists of one image containing five channels. In the first channel for each pixel in the resulting image the linearized coordinates of the pixel in the input image is stored that is in the upper left position relative to the transformed coordinates. The four other channels contain the weights of the four neighboring pixels of the transformed coordinates which are used for the bilinear interpolation, in the following order:

The second channel, for example, contains the weights of the pixels that lie to the upper left relative to the transformed coordinates. If 'coord_map_sub_pix'"coord_map_sub_pix""coord_map_sub_pix""coord_map_sub_pix""coord_map_sub_pix""coord_map_sub_pix" is chosen, MapMapMapMapmapmap consists of one vector field image, in which for each pixel of the resulting image the subpixel precise coordinates in the input image are stored.

gen_grid_rectification_mapgen_grid_rectification_mapGenGridRectificationMapGenGridRectificationMapGenGridRectificationMapgen_grid_rectification_map additionally returns the calculated meshes as XLD contours in MeshesMeshesMeshesMeshesmeshesmeshes。

In contrary to gen_arbitrary_distortion_mapgen_arbitrary_distortion_mapGenArbitraryDistortionMapGenArbitraryDistortionMapGenArbitraryDistortionMapgen_arbitrary_distortion_map, gen_grid_rectification_mapgen_grid_rectification_mapGenGridRectificationMapGenGridRectificationMapGenGridRectificationMapgen_grid_rectification_map and its predecessors are used when the coordinates (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn) of the grid points in the distorted image are neither known nor can be derived from the image contents.

If you want to re-use the created map in another program, you can save it as a multi-channel image with the operator write_imagewrite_imageWriteImageWriteImageWriteImagewrite_image, using the format 'tiff'"tiff""tiff""tiff""tiff""tiff".

注意

Each input XLD contour ConnectingLinesConnectingLinesConnectingLinesConnectingLinesconnectingLinesconnecting_lines must own the global attribute 'bright_dark'"bright_dark""bright_dark""bright_dark""bright_dark""bright_dark", as it is described with connect_grid_pointsconnect_grid_pointsConnectGridPointsConnectGridPointsConnectGridPointsconnect_grid_points!

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
未采用并行化处理。

参数

ImageImageImageImageimageimage (输入对象) singlechannelimage → object (byte / uint2)

输入图像。

ConnectingLinesConnectingLinesConnectingLinesConnectingLinesconnectingLinesconnecting_lines (输入对象) xld-array → object

Input contours.

MapMapMapMapmapmap (输出对象) multichannel-image → object (int4 / uint2 / vector_field)

Image containing the mapping data.

MeshesMeshesMeshesMeshesmeshesmeshes (输出对象) xld-array → object

Output contours.

GridSpacingGridSpacingGridSpacingGridSpacinggridSpacinggrid_spacing (输入控制) integer → (integer)

Distance of the grid points in the rectified image.

限制： GridSpacing > 0

RotationRotationRotationRotationrotationrotation (输入控制) string → (string / integer)

Rotation to be applied to the point grid.

默认值： 'auto' "auto" "auto" "auto" "auto" "auto"

值列表： 0, 90, 180, 270, 'auto'"auto""auto""auto""auto""auto"

RowRowRowRowrowrow (输入控制) point.y-array → (real)

Row coordinates of the grid points.

ColumnColumnColumnColumncolumncolumn (输入控制) point.x-array → (real)

Column coordinates of the grid points.

限制： number(Column) == number(Row)

MapTypeMapTypeMapTypeMapTypemapTypemap_type (输入控制) string → (string)

Type of mapping.

默认值： 'bilinear' "bilinear" "bilinear" "bilinear" "bilinear" "bilinear"

值列表： 'bilinear'"bilinear""bilinear""bilinear""bilinear""bilinear", 'coord_map_sub_pix'"coord_map_sub_pix""coord_map_sub_pix""coord_map_sub_pix""coord_map_sub_pix""coord_map_sub_pix"

结果

gen_grid_rectification_mapgen_grid_rectification_mapGenGridRectificationMapGenGridRectificationMapGenGridRectificationMapgen_grid_rectification_map returns 2 ( H_MSG_TRUE) if all parameter values are correct。如有必要，则抛出异常。

可能的前趋

connect_grid_pointsconnect_grid_pointsConnectGridPointsConnectGridPointsConnectGridPointsconnect_grid_points

可能的后继

map_imagemap_imageMapImageMapImageMapImagemap_image

另见

gen_arbitrary_distortion_mapgen_arbitrary_distortion_mapGenArbitraryDistortionMapGenArbitraryDistortionMapGenArbitraryDistortionMapgen_arbitrary_distortion_map

模块

标定

算子