rotate_imagerotate_imageRotateImageRotateImagerotate_image (算子)

名称

rotate_imagerotate_imageRotateImageRotateImagerotate_image — 围绕图像中心旋转图像。

签名

描述

rotate_imagerotate_imageRotateImageRotateImageRotateImagerotate_image rotates the ImageImageImageImageimageimage counterclockwise by PhiPhiPhiPhiphiphi degrees about its center and stores the result in the output image ImageRotateImageRotateImageRotateImageRotateimageRotateimage_rotate. The output image has the same size as the input image. The only exception are rotations by 90 and 270 degrees where width and height will be exchanged. The domain of the input image is ignored, i.e., assumed to be the full rectangle of the image. The domain of the output image is the intersection of the transformed rectangle and the rectangle of the output image.

If PhiPhiPhiPhiphiphi is a multiple of 90 degrees, this operator is much faster, especially than the general operator affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image。The effect of the parameter InterpolationInterpolationInterpolationInterpolationinterpolationinterpolation is the same as in affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image。It is ignored for rotations by 90, 180, and 270 degrees. If it is necessary to rotate the domain, too, the operator projective_trans_imageprojective_trans_imageProjectiveTransImageProjectiveTransImageProjectiveTransImageprojective_trans_image must be used.

Additionally, for images of type 'byte'"byte""byte""byte""byte""byte", 'int2'"int2""int2""int2""int2""int2" or 'uint2'"uint2""uint2""uint2""uint2""uint2" the system parameter 'int_zooming'"int_zooming""int_zooming""int_zooming""int_zooming""int_zooming" selects between fast calculation in fixed point arithmetics ('int_zooming'"int_zooming""int_zooming""int_zooming""int_zooming""int_zooming" = 'true'"true""true""true""true""true") and highly accurate calculation in floating point arithmetics ('int_zooming'"int_zooming""int_zooming""int_zooming""int_zooming""int_zooming" = 'false'"false""false""false""false""false"). Except for rotations by 90, 180, or 270 degrees, fixed point calculation can lead to minor gray value deviations. Furthermore, the domain of resulting images can differ as well.

注意

The domain of the input image is ignored, i.e., assumed to be the full rectangle of the image. The domain of the output image is the intersection of the transformed rectangle and the rectangle of the output image. The angle PhiPhiPhiPhiphiphi is given in degrees, not in radians. For rotations by 90, 180, and 270 degrees rotate_imagerotate_imageRotateImageRotateImageRotateImagerotate_image is not parallelized internally.

rotate_imagerotate_imageRotateImageRotateImageRotateImagerotate_image can be executed on OpenCL devices if the input image does not exceed the maximum size of image objects of the selected device. Due to numerical reasons, there can be slight differences in the output compared to the execution on the CPU.

执行信息

• 支持 OpenCL 计算设备。
• 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）。
• 在元组级别上自动并行化。
• 在通道级别上自动并行化。
• 在内部数据级别上自动并行化。

参数

read_image(Image,'monkey')
dev_display (Image)
rotate_image(Image,RotImage,270,'constant')
dev_display (RotImage)

read_image(&Image,"monkey");
disp_image(Image,WindowHandle);
rotate_image(Image,&RotImage,270,'constant');
disp_image(RotImage,WindowHandle);

read_image(Image,'monkey')
dev_display (Image)
rotate_image(Image,RotImage,270,'constant')
dev_display (RotImage)

read_image(Image,'monkey')
dev_display (Image)
rotate_image(Image,RotImage,270,'constant')
dev_display (RotImage)

read_image(Image,'monkey')
dev_display (Image)
rotate_image(Image,RotImage,270,'constant')
dev_display (RotImage)

替代

hom_mat2d_rotatehom_mat2d_rotateHomMat2dRotateHomMat2dRotateHomMat2dRotatehom_mat2d_rotate, affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image

另见

mirror_imagemirror_imageMirrorImageMirrorImageMirrorImagemirror_image

模块

基础