Activity for Joseph Sherwood
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Joseph Sherwood posted a comment on discussion JPIV Open Discussion
Hi Peter, thanks for thinking about this. I can't be sure, but I don't believe that the finitie particles size is the case, given the spatial and temporal averaging. Furthermore, I had previously processed the same data and got results that did not produce this response. According to my notes, I used these settings 64 16 8 8 8 8 64 16 8 8 8 8 4 4 4 4 4 4 with a pre-shift of 16 pixels. I also have both RBC images and quasi-simultaneously acquired (alternate pairs) images of fluorescent microparticles....
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Dear Peter, Sorry for the delay, last term was a bit hectic. I have tried your images and they work fine on my system. I attach a stack of images of blood flow in a microchannel. Maybe this issue down to some sampling issue in the blood, but I'm not clear. It didn't happen to me in the past, so it is strange. I couldn't find the jpiv_settings.ser, so have included a screen shot. Thanks for your help, Kind regards, Joseph
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Dear Peter, Sorry for the delay, last term was a bit hectic. I have tried you images and they work fine on my system. I attach a stack of images of blood flow in a microchannel. Maybe this is down to some sampling issue in the blood, but I'm not clear. It didn't happen to me in the past, so it is strange. I couldn't find the jpiv_settings.ser, so have included a screen shot. Thanks for your help, Kind regards, Joseph
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Hi Peter, Long time no JPIV. I have recently returned to some old data on blood cells in a microchannel. I have tried reprocessing the data with JPIV and am getting an odd responses. After much investigation, it appears the issue is with multi-pass. Find atatched some jvc files from processing the same data set (60 image pairs, using ensemble averaging, 50% overlap) with 8 or 4 pixel vector spacing using 1 or 2 passes of the same window parameters. In the first pass, the data are quite smooth. After...
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