Opencv cuda重新映射错误cv.cuda.remap(raw，mapx，mapy，cv.INTER_CUBIC，borderMode=cv.COLOR_RGB2GRAY)

Question

我已经安装了opencv‘4.2.0dev’，这是来自https://jamesbowley.co.uk/accelerate-opencv-4-2-0-build-with-cuda-and-python-bindings/的一个已经构建的包(https://jamesbowley.co.uk/downloads/).I正在尝试使用cv2.cuda.remap，但它正在抛出错误，如下所示

cv.cuda.remap(raw, mapx, mapy, cv.INTER_CUBIC, borderMode=cv.COLOR_RGB2GRAY)
TypeError: Expected Ptr<cv::UMat> for argument 'src' 

我的代码

import numpy
import cv2 as cv
import numpy as np
npTmp = np.random.random((1024, 1024)).astype(np.float32)
npMat1 = np.stack([npTmp,npTmp],axis=2)
raw= cv.cuda_GpuMat()
raw.upload(npMat1)
a=np.array()
mapx = numpy.ndarray(shape=(640, 480, 1),
                           dtype='float32')
mapy = numpy.ndarray(shape=(640, 480, 1),
                           dtype='float32')

cv.cuda.remap(raw,a, mapx, mapy, cv.INTER_CUBIC, borderMode=cv.COLOR_RGB2GRAY)

Answer 1

我知道答案了！

经修订的守则：

sz = (1024,1024,3)
npMat = (np.random.random(sz)*255).astype(np.uint8)
cuMat = cv.cuda_GpuMat(npMat)
npMapX = np.random.rand(sz[0],sz[1]).astype('float32')
npMapY = np.random.rand(sz[0],sz[1]).astype('float32')

cuMapX = cv.cuda_GpuMat(npMapX)
cuMapY = cv.cuda_GpuMat(npMapY)

然后，您应该能够重新映射任何一个

cuDst = cv.cuda_GpuMat(cuMat.size(),cuMat.type())
cv.cuda.remap(cuMat,cuMapX,cuMapY,dst=cuDst,interpolation=cv.INTER_LINEAR)

或

cuDst = cv.cuda.remap(cuMat,cuMapX,cuMapY, interpolation=cv.INTER_LINEAR)