Chunk Features208 Basler pioneer14.3 Frame CounterThe Frame Counter feature numbers images sequentially as they are acquired. When the featureis enabled, a chunk is added to each image containing the value of the counter.The frame counter is a 32 bit value. The counter starts at 0 and wraps at 4294967296. The counterincrements by 1 for each acquired image. Whenever the camera is powered off, the counter willreset to 0.Be aware that if the camera is acquiring images continuously and continuous capture is stopped,several numbers in the counting sequence may be skipped. This happens due to the internal imagebuffering scheme used in the camera.To enable the frame counter chunk: Use the Chunk Selector to select the Frame Counter chunk. Use the Chunk Enable parameter to set the value of the chunk to true.Once the frame counter chunk is enabled, the camera will add a frame counter chunk to eachacquired image.To retrieve data from a chunk appended an image that has been received by your PC, you mustfirst run the image and its appended chunks through the chunk parser included in the pylon API.Once the chunk parser has been used, you can retrieve the frame counter information by doing thefollowing: Read the value of the Chunk Frame Counter parameter.You can set the Chunk Selector and Chunk Enable parameter value from within your applicationsoftware by using the pylon API. You can also run the parser and retrieve the chunk data. Thefollowing code snippets illustrate using the API to activate the chunk mode, enable the framecounter chunk, run the parser, and retrieve the frame counter chunk data:// make chunk mode active and enable Frame Counter chunkCamera.ChunkModeActive.SetValue( true );Camera.ChunkSelector.SetValue( ChunkSelector_Framecounter );Camera.ChunkEnable.SetValue( true );// retrieve date from the chunkIChunkParser &ChunkParser = *Camera.CreateChunkParser();GrabResult Result;StreamGrabber.RetrieveResult( Result );ChunkParser.AttachBuffer( (unsigned char*) Result.Buffer(),NoteThe chunk mode must be active before you can enable the frame counterfeature or any of the other chunk feature. Making the chunk mode inactivedisables all chunk features.
