General > General Technical Chat
Can ordinary humans enhance blurry pictures yet ?
<< < (7/8) > >>
Stray Electron:
    It really depends on your photographs. I use GIMP and I find that almost all pictures can be sharpened somewhat with it. But not like the nonsense that they show on television! Tweaking the Brightness and Contrast sometimes helps make certain elements in the picture more visible too.  Download a copy of GIMP and try it. It uses a slider to control the Sharpness and it shows a thumbnail image of a portion of the photo and you can position that over the area of interest and then watch the sharpness increase or decrease as you move the slider. For me, I get the best results at about 66 to 80%.  GIMP can be tricky if you want to save an image as a JPG since it wants to save changed images in it's own format so you have to Export the image and select JPG as the file type instead of just Saving it.  GIMP is available for both Windows and Linux and Mac OS and it's free.
SilverSolder:

--- Quote from: Someone on March 08, 2021, 10:17:08 pm ---
--- Quote from: SilverSolder on March 08, 2021, 03:10:32 pm ---We are not yet seeing sound being picked out of the image...  I'm looking forward to the live demonstration!   :D
--- End quote ---
It has been demonstrated, there is nothing preventing these methods being done live (other than funding/development effort):



--- Quote from: antenna on March 08, 2021, 04:54:29 pm ---The only way to add information and reduce noise in a photo is it have multiple frames from the same perspective (of an unmoved object, like a guy on a security camera that stood still for 12 frames) and average them such that the random noise cancels and the similar information reinforces itself.
--- End quote ---
It certainly does not require multiple images of a still/unmoved object. Reconstruction from multiple perspectives/moving scene is usually superior. Some of the details are in the above video, but "enhance" from moving objects has been the traditional use case.

--- End quote ---

That is pretty impressive -  I guess that with a 5602Hz frame rate (using the frame to frame recognition method), a frequency response up to 2.8Khz should be theoretically possible (Nyquist again!).

Using the roller shutter is of course another step of totally awesome - wonder how much "unintended audio" has been encoded in videos across the world?

RJSV:
Yeah, LOL, like to see,...um, hear Tom Cruise yelling at that poor (mask less) stage-hand... (!!!)
MathWizard:

--- Quote from: antenna on March 08, 2021, 04:54:29 pm ---The only way to add information and reduce noise in a photo is it have multiple frames from the same perspective (of an unmoved object, like a guy on a security camera that stood still for 12 frames) and average them such that the random noise cancels and the similar information reinforces itself. Image enhancements other than adding information also exist, but those are based of manipulating the existing data, for example, using mathematical convolution masks.



--- End quote ---
I yeah some lecture, I guess rather recently, about using AI to examine pictures, and using some matrices of course, to extrapolate a more detail image ........but right, thats like the capthcha puzzle things too. So we aren't really there yet, movies have let me down again.

So I should try a proper image editor, but I doesn't really matter much for the PCB picture I had, the only cap values are easy enough to deduce.
cdev:
Some of the old movies that have been colorized and digitally enhanced look strikingly real. On Youtube they have some old films of new york city before my birth that are very realistic looking. I used to go into the city a lot as a child and some of these videos are old enough to still contain signs and landmarks that I remember from my childhood, now long gone. Colorization/enhancement  of films from the early 20th century really gives them a new life.

You can also use photogrammetry to digitally reconstruct some of the geometry they show.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod