motion-detection

I am making a sentry turret with servos and a paintball gun and need to implement real time motion tracing to make the gun shoot anything that moves. how can I code this(any good algorithms, books, tutorials)? I want to make it myself and not use premade solutions. Lucas-Kanade with Kalman filtering is the bread and butter motion tracking algorithm. However, it's a bit outdated. We (Success Labs) just published a Lucas-Kanade app for the iPhone. You can read about it here - http://www.success-ware.com/150842/Lucas-Kanade-Detection-for-the-iPhone There's a link to the AppStore, and source code

I'm trying read or understand CMBlockBufferRef representation of H.264 AVC 1/30 frame. The buffer and the encapsulating CMSampleBufferRef is created by using VTCompressionSessionRef . https://gist.github.com/petershine/de5e3d8487f4cfca0a1d H.264 data is represented as AVC memory buffer, CMBlockBufferRef from the compressed sample. Without fully decompressing again , I'm trying to extract motion vectors or predictions from this CMBlockBufferRef . I believe that for the fastest performance, byte-by-byte reading from the data buffer using CMBlockBufferGetDataPointer() should be necessary. However

I am trying to extract motion vector data from an encoded mp4 file. In a previous post I found an answer http://www.princeton.edu/~jiasic/cos435/motion_vector.c . But I am not able to run the code without errors . What are the other files that have to be included in the file ? I am a newbie here . So any help would be appreciated . I had modified the source code of mplayer (ffmpeg) to extract motion vectors for any compressed video, I have uploaded the modified mplayer code which can be used for extracting motion vectors here http://www.cs.umd.edu/~bharat/modmplayer.zip You need to do the

I have an application which needs to be able to detect the movement of object or image which is shown on camera screen. Is this possible with the iPhone? Bijoy Thangaraj You'll need to use a motion detection algorithm to do so. Check these links. They should help you get started. Fast, very lightweight algorithm for camera motion detection? How can you track motion using the iPhone's camera? 来源： https://stackoverflow.com/questions/12382780/how-to-detect-movement-of-object-on-iphones-camera-screen

In my application I want to detect the shake event and I'm using SensorEventListener, the code is working fine when my activity is running in foreground. But when I press the lock button of the phone to lock the screen, the shake event can't be detected. I have tested my code on the Samsung gts5360. But the same code is working fine on sony ericssion xperia mini pro. Actually my Samsung phone is not detecting the shake events when I leave the device idle for approx. 45 seconds, after locking the device. Then I shake the phone, it does not detect the shake, but when I shake phone after several