Morphology

group NVCV_C_ALGORITHM_MORPHOLOGY

Functions

NVCVStatus cvcudaMorphologyCreate(NVCVOperatorHandle *handle)

Constructs and an instance of the Morphology operator.

Parameters:

handle – [out] Where the image instance handle will be written to.

  • Must not be NULL.

Return values:

  • NVCV_ERROR_INVALID_ARGUMENT – Handle is null.

  • NVCV_ERROR_OUT_OF_MEMORY – Not enough memory to create the operator.

  • NVCV_SUCCESS – Operation executed successfully.

NVCVStatus cvcudaMorphologySubmit(NVCVOperatorHandle handle, cudaStream_t stream, NVCVTensorHandle in, NVCVTensorHandle out, NVCVTensorHandle workspace, NVCVMorphologyType morphType, int32_t maskWidth, int32_t maskHeight, int32_t anchorX, int32_t anchorY, int32_t iteration, const NVCVBorderType borderMode)

Executes the morphology operation of Dilates/Erodes on images

Limitations:

Input: Data Layout: [kNHWC, kHWC] Channels: [1, 3, 4]

Data Type

Allowed

8bit Unsigned

Yes

8bit Signed

No

16bit Unsigned

Yes

16bit Signed

No

32bit Unsigned

No

32bit Signed

No

32bit Float

Yes

64bit Float

No

Output: Data Layout: [kNHWC, kHWC] Channels: [1, 3, 4]

Data Type

Allowed

8bit Unsigned

Yes

8bit Signed

No

16bit Unsigned

Yes

16bit Signed

No

32bit Unsigned

No

32bit Signed

No

32bit Float

Yes

64bit Float

No

Input/Output dependency 

 Property      |  Input == Output
-------------- | -------------
 Data Layout   | Yes
 Data Type     | Yes
 Number        | Yes
 Channels      | Yes
 Width         | Yes
 Height        | Yes

Parameters:

  • handle – [in] Handle to the operator.

    • Must not be NULL.

  • stream – [in] Handle to a valid CUDA stream.

  • in – [in] Input tensor.

  • out – [out] Output tensor.

  • workspace – [in] Workspace tensor, must be the same size as the input tensor; can be null if not calling Dilate/Erode with an iteration of 1

  • morphType – [in] Type of operation to performs Erode/Dilate. NVCVMorphologyType.

  • maskWidth – [in] Width of the mask to use (set heigh/width to -1 for default of 3,3).

  • maskHeight – [in] Height of the mask to use (set heigh/width to -1 for default of 3,3).

  • anchorX – [in] X-offset of the kernel to use (set anchorX/anchorY to -1 for center of kernel).

  • anchorY – [in] Y-offset of the kernel to use (set anchorX/anchorY to -1 for center of kernel).

  • iteration – [in] Number of times to execute the operation, typically set to 1. Setting to higher than 1 is equivelent of increasing the kernel mask by (mask_width - 1, mask_height -1) for every iteration.

  • borderMode – [in] Border mode to be used when accessing elements outside input image, cf. NVCVBorderType.

Return values:

  • NVCV_ERROR_INVALID_ARGUMENT – Some parameter is outside valid range.

  • NVCV_ERROR_INTERNAL – Internal error in the operator, invalid types passed in.

  • NVCV_SUCCESS – Operation executed successfully.

NVCVStatus cvcudaMorphologyVarShapeSubmit(NVCVOperatorHandle handle, cudaStream_t stream, NVCVImageBatchHandle in, NVCVImageBatchHandle out, NVCVImageBatchHandle workspace, NVCVMorphologyType morphType, NVCVTensorHandle masks, NVCVTensorHandle anchors, int32_t iteration, const NVCVBorderType borderMode)

Executes the morphology operation of Dilates/Erodes on images, using an array of variable shape images.

Limitations:

Input: Data Layout: [kNHWC, kHWC] Channels: [1, 3, 4]

Data Type

Allowed

8bit Unsigned

Yes

8bit Signed

No

16bit Unsigned

Yes

16bit Signed

No

32bit Unsigned

No

32bit Signed

No

32bit Float

Yes

64bit Float

No

Output: Data Layout: [kNHWC, kHWC] Channels: [1, 3, 4]

Data Type

Allowed

8bit Unsigned

Yes

8bit Signed

No

16bit Unsigned

Yes

16bit Signed

No

32bit Unsigned

No

32bit Signed

No

32bit Float

Yes

64bit Float

No

Input/Output dependency 

 Property      |  Input == Output
-------------- | -------------
 Data Layout   | Yes
 Data Type     | Yes
 Number        | Yes
 Channels      | Yes
 Width         | Yes (per image in/out pair)
 Height        | Yes (per image in/out pair)

Parameters:

  • handle – [in] Handle to the operator.

    • Must not be NULL.

  • stream – [in] Handle to a valid CUDA stream.

  • in – [in] Input variable shape tensor.

  • out – [out] Output variable shape tensor.

  • workspace – [in] Workspace tensor, must be the same size as the input var shape tensor; can be null if not calling Dilate/Erode with an iteration of 1

  • morphType – [in] Type of operation to perform (Erode/Dilate). NVCVMorphologyType.

  • masks – [inout] 1D Tensor of NVCV_DATA_TYPE_2S32 mask W/H pairs, where the 1st pair is for image 0, second for image 1, etc. Setting values to -1,-1 will create a default 3,3 mask. (Note after the operation the tensor values may be modified by kernel)

  • anchors – [inout] 1D Tensor of NVCV_DATA_TYPE_2S32 X/Y pairs, where the 1st pair is for image 0, second for image 1, etc Setting values to -1,-1 will anchor the kernel at the center. (Note after the operation the tensor values may be modified by kernel)

  • iteration – [in] Number of times to execute the operation, typically set to 1. Setting to higher than 1 is equivelent of increasing the kernel mask by (mask_width - 1, mask_height -1) for every iteration.

  • borderMode – [in] Border mode to be used when accessing elements outside input image, cf. NVCVBorderType.

Return values:

  • NVCV_ERROR_INVALID_ARGUMENT – Some parameter is outside valid range.

  • NVCV_ERROR_INTERNAL – Internal error in the operator, invalid types passed in.

  • NVCV_SUCCESS – Operation executed successfully.