I’ve attached some images below, the images are from Flawtech plates with known flaws in them. I’m an old school film guy, for me looking at CR comes through like watching a movie filmed in CGI, it’s close but its not real. I have a photo of a film image, I have a raw CR image only window and level adjustments, and an image that has been filtered along with window and level.
This one is a photo of a film based radiograph of the plate. I could darken up the photo and filter it, the photo really doesn't give the same look at it as using your own eyes on a film viewer, but I left it alone. There is a crack and and a known lack of Penetration at the root of a double-V groove weld, the plate 0.625" thick with reinforcement.
This is the same plate using CR no filters, window and level only (Brightness and contrast)
Again same plate, CR image window and level and lots of filters applied. Notice the small line on the far left in the weld? that is a shadow from surface contour, shows up in all the images if you look close. in the film it is barely visible. When I use this for CR practical exams, everyone wants to call it slag.
Another example; this is a different plate, also with known flaws.
this is a CR image, raw - window and level only. Lack of fill and tungsten inclusion.
This is the same plate, actually the same image post processing with a lot of filters applied. The lack of fill could be mistaken for something else if you didn't have the part available to look at.
I think that there is a danger of over filtering and image, which can lead to overcalls, rejecting things that aren’t actual flaws.
Maybe I just need to adjust to the new way of seeing images. Just because it doesn’t look like film doesn’t mean it not valid or viewable. The IQI image is clearly visible. Pixel Intensity values were good, the filtering makes some aspects more visible. It does emphasize parts of the flaws making them look a little different. Is that a bad thing? Where do you draw the line on too much filtering?
Is this like girls on Tik Tok, their picture so filtered that if you meet them in person it doesn’t look like the same person?
CR and DR are a good thing and they are the future of Radiographic testing, we just need to make sure we don't filter the image so hard that we start seeing things that aren't there.
Have a Great day!
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