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Find blobs in given image. More...
| Functions | |
| AFAPI array | regions (const array &in, const af::connectivity connectivity=AF_CONNECTIVITY_4, const dtype type=f32) | 
| C++ Interface for getting regions in an image.  More... | |
| AFAPI af_err | af_regions (af_array *out, const af_array in, const af_connectivity connectivity, const af_dtype ty) | 
| C Interface for regions in an image.  More... | |
Find blobs in given image.
Given a binary image (with zero representing background pixels), regions computes a floating point image where each connected component is labeled from 1 to N, the total number of components in the image.
A component is defined as one or more nonzero pixels that are connected by the specified connectivity (either 4-way(AF_CONNECTIVITY_4) or 8-way(AF_CONNECTIVITY_8)) in two dimensions.
 
The default connectivity is AF_CONNECTIVITY_4.
| AFAPI af_err af_regions | ( | af_array * | out, | 
| const af_array | in, | ||
| const af_connectivity | connectivity, | ||
| const af_dtype | ty | ||
| ) | 
C Interface for regions in an image.
| [out] | out | array will have labels indicating different regions | 
| [in] | in | array should be binary image of type b8 | 
| [in] | connectivity | can take one of the following [AF_CONNECTIVITY_4 | AF_CONNECTIVITY_8] | 
| [in] | ty | is type of output array | 
| AFAPI array af::regions | ( | const array & | in, | 
| const af::connectivity | connectivity = AF_CONNECTIVITY_4, | ||
| const dtype | type = f32 | ||
| ) | 
C++ Interface for getting regions in an image.
Below given are sample input and output for each type of connectivity value for type 
| Example for type== AF_CONNECTIVITY_8 | Example for type== AF_CONNECTIVITY_4 | 
|     af::array in(8, 8, input);     //af_print(in);     // in =     // 0   0   0   0   1   0   1   0     // 0   0   0   0   0   0   1   1     // 0   1   0   1   0   0   0   0     // 0   0   1   0   1   1   0   1     // 1   1   0   0   0   1   0   1     // 0   0   0   1   0   0   0   1     // 0   0   0   0   1   0   0   1     // 0   1   0   0   0   1   0   0     // Compute the label matrix using 8-way connectivity     //af_print(out);     // 0   0   0   0   4   0   5   0     // 0   0   0   0   0   0   5   5     // 0   1   0   1   0   0   0   0     // 0   0   1   0   1   1   0   6     // 1   1   0   0   0   1   0   6     // 0   0   0   3   0   0   0   6     // 0   0   0   0   3   0   0   6     // 0   2   0   0   0   3   0   0 |     af::array in(8, 8, input);     //af_print(in.T());     //in     //0  0  0  0  1  0  1  0     //0  0  0  0  0  0  1  1     //0  1  0  1  0  0  0  0     //0  0  1  0  1  1  0  1     //1  1  0  0  0  1  0  1     //0  0  0  1  0  0  0  1     //0  0  0  0  1  0  0  1     //0  1  0  0  0  1  0  0     // Compute the label matrix using 4-way connectivity     //af_print(out.T());     //out     //0  0  0  0  7  0 11  0     //0  0  0  0  0  0 11 11     //0  2  0  5  0  0  0  0     //0  0  4  0  8  8  0 12     //1  1  0  0  0  8  0 12     //0  0  0  6  0  0  0 12     //0  0  0  0  9  0  0 12     //0  3  0  0  0 10  0  0 | 
| [in] | in | array should be binary image of type b8 | 
| [in] | connectivity | can take one of the following [AF_CONNECTIVITY_4 | AF_CONNECTIVITY_8] | 
| [in] | type | is type of output array |