I recently purchased a Nikon D7100 with 24.3 mp and they have done away with the aa filter altogether to sharpen up the image,I have taken about 200 pictures and so far found no evidence of moire,however I cannot see any improvement of sharpness over my old Nikon D90 when displaying them on my pc!Perhaps you only notice the increase of sharpness when blowing them up or its all conspiracy!but hey I'm happy with camera and its resulting images and that's what photography is all about isn't it? – user19433 Apr 18 '13 at 12:48 •. A very good way to remove texture is with Neat plug in at neatimage.com It removes patterns easily in one pass with minimal blurring. You have to increase the filtering in the Y channel to 100%. Then Focus Magic can be used to remove any blurring. A filter that automatically removes/reduces repeating patterns like raster patterns or paper texture.It would be of great help for anyone who ever encounters a scanned image with a repeating pattern (typical for image restoration work or when the only source for an image is a printed copy).Before/after example (click to see gif animation): How to make such a filter: This can be done by doing a Fast Fourier Transform (FFT) to split an image into frequency components. The frequencies that make up repeating patterns will stand out and can be removed (today we do this manually with a black brush, but a filter can remove the 'peaks' automatically). And inverse FFT is then performed to transform the image back. This entire process can be automated into one step; perhaps just with a slider to let the user choose how aggressively the filter removes frequencies.I posted a detailed explanation with a short tutorial on how this is done step by step.Note that this only works on a single channel, so normally you would just bother to do this on the Luminosity component. Filtering each RGB-channel separately can also be done. I will leave that up to you Adobe.;). Example of this done to an image with a raster pattern: (click to see before/after. Healing brush used to clean up some damage.) Another example: This is just the FFT-filter, and I automated it using actions (with the help Threshold to find the 'peaks'). Can't make it fully automated with actions yet though, but it can greatly speed things up until someone makes a proper filter. Free kasparov chess download. (click to see before/after) I think such a filter could generate a little 'wow!' When demoed.;) Edit: Some more examples and a downloadable plugin for doing the transform (but not the cleanup). I just found out that the (OSX only) has got an FFT-based 'noise remover' (pattern remover). Cfs tr setup bbs exercise. With live preview of what you're doing! Hey Adobe, this is kinda what we wanted! So this is an option for Mac-users who need FFT (). It's not automated, but it cuts the painting time in half by mirroring your strokes, so that's nice.:) Ps: A bit off-topic, but it also has a frequency separation filter (with live preview). Something a lot of Photoshop-users currently have to use actions for (and lack preview). We are trying to get him to update his port by encouraging him to start a crowd funding project. Here is a standalone software that does FFT for modern Macs; but I cannot find a tutorial on how to apply it to 3 channel RGB images. I know it can do it, but it's a real pain to figure out and frustrating with no brush approach that I can figure out how to use. If you do a YouTube search for 'Image J FFT' you will find a few but they are not as helpful for they do not explain how to merge channels after the repair. Recently, me and Ronc fixed fresh (and free) Windows-plugins for doing the Fourier Transform (fixed the old bugs), and made actions to semi-automate the suppression and also increase the quality of the results. Makes the process 100x faster, with better results. This is right now the best way of doing FT-based pattern removals. The implementation in Affinity. Note: After posting v1 we have made some great improvements, and implemented both per-channel and 3D transformation for doing color images. It will be in v2 that will be posted on the same link around the end of the month I think (may/june 2018) - I just gotta record some video first. If anyone's able to make an OSX-version of the plugins the actions should be trivial to adapt. I just came across Affinity Photo. Not only does in work on both Windows and Mac platforms, but it already has one of the best implementations of the FFT filter based pattern removers I've seen. It shows a split screen of your image, and as you paint out the bright dots, you can see the immediate result in the 'after' split screen.
0 Comments
Leave a Reply. |