Difference between revisions of "Function:GoodFeaturesToTrack"
From CUVI Wiki
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| 8uC1 | | 8uC1 | ||
| CuviPointValue2D | | CuviPointValue2D | ||
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===Example=== | |||
{| | |||
|style="font-size:150%;"| | |||
<syntaxhighlight lang="cpp"> | |||
//Create an 8-bit Grays-scale CuviImage | |||
CuviImage *gpu_image = new CuviImage(size,img->depth,img->nChannels); | |||
//Populate the Image | |||
gpu_image->upload(img->imageData,img->widthStep); | |||
CuviPointValue2D *features; | |||
// Desired number of features | |||
int featureCount = 100; | |||
//Selecting complete image for the process | |||
CuviROI roi = cuviROI(0,0,img->width,img->height); | |||
// Setting Feature selection parameters | |||
CuviFeaturesCriteria criteria = cuviFeaturesCriteria(CUVI_FEATURES_HARRIS_PETER,0.006f,15,3,-2.0f); | |||
//calling GoodFeaturesToTrack | |||
cuvi::computerVision::goodFeaturesToTrack(&gimg,roi,&features,&featureCount,criteria); | |||
</syntaxhighlight> | |||
|} | |} |
Revision as of 20:21, 25 April 2012
Detecting interesting parts of an image is an important step in most computer vision applications. Itserves as the first low-level processing step in applications like image segmentation, object recognition, object tracking and motion estimation. CUVI offers feature detectors including KLT, Harris and Peter in a single function
Function
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Parameters
Name | Type | Description |
---|---|---|
srcImage | CuviImage* | Input 8 bit Gray Scale Image. |
roi | CuviROI | Desired region of interest of input image. The function will return features from only that region of the image |
outputFeatures | CuviPointValue2D** | Output feature list that contains the coordinates & values of features/corners. |
maxFeatures | Cuvi32s* | Desired number of features. If the total features detected in the image or ROI are less than maxFeatures its value is updated to that number |
criteria | CuviFeaturesCriteria | A structure containing various parameters that affect feature selection behavior |
stream | CuviStream* | GPU stream ID for execution |
Image Type Support
Input | Output |
---|---|
8uC1 | CuviPointValue2D |
Example
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