In addition thanks for guidance from Demoree on some of the basics of photoshop I have become…um…lets say not completely ignorant of the capabilities of photoshop. Before last night I’ve only used this knowledge to do some touching up of personal pictures for this blog, but last night I got thinking about how I have hundreds of images taken during testing that don’t look good because lighting is very poor. I played with it a bit and sure enough I was able to turn pictures that provided information but looked crappy into nice and informative pictures…so credit the blog with producing a useful skill for work. Below is an example of one such image that I’ve always been disappointed in the way it looked, but after some filtering of the image it looks much more like the real flow.
Original image of dye being injected into the tunnel. 
Corrected image of dye being injected into the tunnel.
6 comments:
Great job! I'm proud of you. And I'm glad to know that both me & the blog helped you professionally. and yay for a name!
Great job B! Like the pic... everything is so much clearer.
is that fudging data? jk
I know the comment about "fudging data" was a joke, but being a researcher I feel I have to stress this is in no way fudging data. In fact it is the complete opposite. The picture I originally took is not the way it looked in Memphis during the experiment, but by filtering the image it does appear the same as it looked in Memphis. Thus if I were to use the orginal image it won't accurately portray what was seen in the experiment (i.e. bad information), but if I filter the image I now can convey reality to the viewer of that image.
However I would say someone is fudging their results if they were to alter, in anyway, the actual features of the image and not just the brightness/contrast because its the features that are the real information...thus altering them would be creating or destroying the actual data set.
Digital image processing is commonly used in fluid measurements. It is in fact essential to filter out the backgroud noises by using some threshold or weighting function so that the results represent the real physics more accurately.
:))
Yes, I was just kidding! couldn't help it! I wish I could have filtered gel images when writing my thesis, that may have helped see the bands lost in the scans.
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