GFFTDetector and goodFeaturesToTrack do not return intensity of the corner #16462
Description
System information (version)
- OpenCV => should be all of them, from at least 2.4
- Operating System / Platform => not relevant
- Compiler => not relevant
Detailed description
GFFTDetector and goodFeaturesToTrack do not fill the response field in keypoints returned from detect method.
Other detectors such as FastFeatureDetector fill that field.
Steps to reproduce
import cv2
capture = cv2.VideoCapture('video.mp4')
# detector = cv2.GFTTDetector_create(60, 0.01, 22, 5)
detector = cv2.FastFeatureDetector_create(threshold=90)
stop = False
while not stop:
try:
raw = capture.read()
if raw is None:
break
raw = cv2.resize(raw, (480, 640))
gray = cv2.cvtColor(raw, cv2.COLOR_BGR2GRAY)
kp = detector.detect(gray, None)
frame = cv2.drawKeypoints(raw, kp, None, color=(255, 255, 255))
print("Total Keypoints with nonmaxSuppression: {}".format(len(kp)))
cv2.imshow('fast_true', frame)
key = cv2.waitKey(1) & 0xFF
if key == ord('q'):
stop = True
except KeyboardInterrupt:
break
cv2.destroyAllWindows()using
set(k.size for k in kp)
set(k.response for k in kp)
set(k.octave for k in kp)
set(k.angle for k in kp)you can prove that.
As far as I know in my company we maintain a version of opencv to return the intensity of the corner in the method goodFeaturesToTrack, in case I can help to fix this.