image-processing
image-processing


Author Comment Last activity Moderation
cfastie "ImageJ and Fiji have very powerful tools for extracting, summarizing, and displaying the NDVI values in the floating point images produced by Ned's..." | Read more » almost 8 years ago
ahcalori "@cfastie. I think you are right. The problem must be the filters. I will open the cam and see what happens. I'm just using the product the way I bo..." | Read more » almost 8 years ago
cfastie "The color gradient in the photos taken by your modified camera seems to be the cause of the artifacts in your NDVI image. To determine whether this..." | Read more » almost 8 years ago
ahcalori "Hi, dear @cfastie, the webcam that I have been used is described in the follow link: https://www.adafruit.com/product/1722. The filter used allow ..." | Read more » almost 8 years ago
ahcalori "@cfastie, Is not the Mobius camera. Is just one with modified filters. I will post the specification here. Thanks! " | Read more » almost 8 years ago
cfastie "Although the diagonal color gradient is not conspicuous in the NDVI image, it is present in the NIR photo (pinkish in the lower left and bluish in ..." | Read more » almost 8 years ago
ahcalori "@cfastie, Thanks for reply. The camera that has been used is one bought in the 'Public Lab Store'. The curious fact is that some pics does not has ..." | Read more » almost 8 years ago
cfastie "The color gradient in the NIR photo from lower left to upper right is conspicuous.This could be caused by the ambient lighting or by the camera. Wi..." | Read more » almost 8 years ago
mathew "Followup on automating this process https://publiclab.org/notes/SimonPyle/05-13-2016/automating-imagej-for-particle-image-analysis " | Read more » about 8 years ago
mathew "Although we are hopeful that Simon's strategies listed here can get us to a particle count, If they aren't sufficient Rongjun Qin recommended we lo..." | Read more » about 8 years ago
mathew "You can get the analysis spreadsheet here: https://docs.google.com/spreadsheets/d/1xSVT9lxary0zZhhEqhrX3hsdIb4shbYhaOJx_RWhESg/edit#gid=0 " | Read more » about 8 years ago
mathew "That's a great writeup! thanks Simon. If anyone needs an image set to play with, please e-mail me, and I can share the files. They're too large t..." | Read more » about 8 years ago
mathew "Also see @Damarquis's note on using MaxEntropy https://publiclab.org/notes/Damarquis/10-20-2015/using-imagej-to-analyze-threshold-and-saving-result..." | Read more » about 8 years ago
mathew "I'm working on creating a spreadsheet out of these equations. @Marlokeno it looks like I'm going to use Sutherland's gas law along with average te..." | Read more » over 8 years ago
mathew "excellent suggestion, thanks for pulling that up! On a brief review, it confirms our experience that PM10 is probably the smallest size we can rel..." | Read more » over 8 years ago
acenchase "This is very interesting. May I suggest checking out the guide published by NIST which has some guidelines for performing image analysis by SEM in..." | Read more » over 8 years ago
mathew "@Damarquis has notes on using ImageJ in windows and on thresholding: http://publiclab.org/notes/Damarquis/10-20-2015/using-imagej-to-analyze-thresh..." | Read more » over 8 years ago
marlokeno "It is possible the wikipedia article on Reynolds numbers might help- https://en.wikipedia.org/wiki/Reynolds_number At any rate, the article does g..." | Read more » over 8 years ago
marlokeno "There is an article in "Aeolian Research", Dec. 2014, entitled "The size distribution of desert dust aerosols and its impact on the Earth system." ..." | Read more » over 8 years ago
unsignedint "Hello liz, I think B&W+Green reveals the presence of IR very clearly. The problem is that the intensity is hard to tell, so other color schemes..." | Read more » almost 10 years ago
liz "This B&W and green image is so striking! " | Read more » almost 10 years ago
unsignedint "Hello Chris! Answering your question What is the "A" in RGBA? Alpha. For this application, it probably does not make any difference whether I pas..." | Read more » almost 10 years ago
cfastie "Blender looks to be quite capable. I have some questions about your 3 step process to make the color mapped image: What is the "A" in RGBA? You s..." | Read more » almost 10 years ago
mercyorangi "Hi Warren, tags already added :-) " | Read more » almost 10 years ago