Difference between revisions of "Function:GoodFeaturesToTrack"
From CUVI Wiki
Line 70: | Line 70: | ||
//Populate the Image | //Populate the Image | ||
gpu_image->upload(img->imageData,img->widthStep); | gpu_image->upload(img->imageData,img->widthStep); | ||
CuviPointValue2D *features; | CuviPointValue2D *features; | ||
// Desired number of features | //Desired number of features | ||
int featureCount = 100; | int featureCount = 100; | ||
Line 80: | Line 79: | ||
CuviROI roi = cuviROI(0,0,img->width,img->height); | CuviROI roi = cuviROI(0,0,img->width,img->height); | ||
// Setting Feature selection parameters | //Setting Feature selection parameters | ||
CuviFeaturesCriteria criteria = cuviFeaturesCriteria(CUVI_FEATURES_HARRIS_PETER,0.006f,15,3,-2.0f); | CuviFeaturesCriteria criteria = cuviFeaturesCriteria(CUVI_FEATURES_HARRIS_PETER,0.006f,15,3,-2.0f); | ||
// | //Calling GoodFeaturesToTrack | ||
cuvi::computerVision::goodFeaturesToTrack(&gimg,roi,&features,&featureCount,criteria); | cuvi::computerVision::goodFeaturesToTrack(&gimg,roi,&features,&featureCount,criteria); | ||
</syntaxhighlight> | </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
|
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
|