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2016-02-23 04:01:09 -0600	asked a question	How can I use the second argument of sift.detectAndCompute() ? Hi, I'm using SIFT algorithm for comparing the features between two images. I'm curious to know about the second argument of sift.detectAndCompute() method. I'm using none in my script. I know the method's syntax `cv2.SIFT.detectAndCompute(image, mask[, descriptors[, useProvidedKeypoints]]) → keypoints, descriptors¶` But I couldnot understand how can I use this "mask"? A brief Explanation with an example is very helpful for me
2015-12-11 04:13:02 -0600	commented question	Can we get the PTS value of the frame Thank Berak!!!
2015-12-11 03:53:13 -0600	commented question	Can we get the PTS value of the frame Yes. It is unrelated to SIFT .Here I'm comparing the video frames with a reference frame, for comparing i'm using SIFT algorithm.When match-count is high, as output I need to provide the PTS value which will be in the PES Packetized Elementary Stream header. It not refers to the date/time picture when acquired.
2015-12-11 02:39:46 -0600	received badge	● Editor (source)
2015-12-11 02:38:15 -0600	commented question	Can we get the PTS value of the frame Presentation timestamp.
2015-12-11 01:16:09 -0600	asked a question	Can we get the PTS value of the frame I'm using SIFT feature of Opencv in an application. I need to read the PTS value of the frame which i'm using. Is there any API to read PTS value in Opencv. As a input I'm giving the video and I need to read the Presentation timestamp (PTS) of the frames in the video.
2015-10-23 06:20:28 -0600	received badge	● Supporter (source)
2015-10-23 05:40:53 -0600	asked a question	In drawKeypoints function, on what basis keypoints are drawn ? I'm searching for a image in the video which the image already exists but trans-coded to another codec and resolution is also changed. I thought opencv can help to get the solution. I have come through drawKeypoints function in opencv, this function on what basis it draws the keypoints ? If it is on the basis of coordinates, will different resolution of image and video results same keypoints ?