Function:ImageGradients

Calculates X and Y gradients of image

Function

CuviStatus imageGradients(CuviImage* srcImage, CuviImage* dstX, CuviImage* dstY, CuviGradientKernelType type = CUVI_GRADIENT_SOBEL_3x3, CuviStream* stream = NULL);

Parameters

Name	Type	Description
srcImage	CuviImage*	Input image
dstX	CuviImage*	Horizontal image gradient
dstY	CuviImage*	Vertical image gradient
type	CuviGradientKernelType	Supports: CUVI_GRADIENT_CENTRAL_DIFFERENCE CUVI_GRADIENT_SOBEL_3x3 CUVI_GRADIENT_SOBEL_5x5 CUVI_GRADIENT_SCHARR_3x3
stream	CuviStream*	GPU stream ID for execution

Image Type Support

Input	Output
8uC1	32fC1
8uC3	32fC3

Sample

Error creating thumbnail: Unable to save thumbnail to destination Input Image
Error creating thumbnail: Unable to save thumbnail to destination Sobel X, 3x3	Error creating thumbnail: Unable to save thumbnail to destination Sobel Y, 3x3

Example

//Container for input Image CuviImage* gimg = new CuviImage(size,depth,nChannels); //Containers for gradients CuviImage* gX = new CuviImage(size,32,nChannels); CuviImage* gY = new CuviImage(size,32,nChannels); //Populating GPU input image gimg->upload(hostImg->imageData, hostImg->widthStep); //function call cuvi::computerVision::imageGradients(gimg,gX,gY,CUVI_GRADIENT_CENTRAL_DIFFERENCE);