How can I get smart sharpen effect on my images using python?

Question

I am wondering how to smartly sharpen an image using python or any related image library like ndimage , skimage or even PIL . I can find methods that actually sharpen mine but with a lot of noise and pixelation when scaling. Since I know Photoshop , I tried to get this clever sharpness effect, which sharpen the image with less noise and a nice sweet contrast through python, but I failed.

Notes: -
(1) have been verified: -

 >>> # The 1st Method: >>> import Image >>> import ImageFilter >>> image.filter(ImageFilter.SHARPEN) >>> Image.filter(ImageFilter.EDGE_ENHANCE_MORE) #Look down:1st image created >>> # The 2nd Method: >>> blurred_l=scipy.ndimage.gaussian_filter(b,3) >>> filter_blurred_l = scipy.ndimage.gaussian_filter(blurred_l, 1) >>> alpha =30 >>> sharpened = blurred_l + alpha * (blurred_l - filter_blurred_l) >>> # The 3rd Method: >>> shar=imfilter(Image,'sharpen') #Look down:2nd image created 

(2) I found a piece of code, but in Perl . I only know python here or directly (3) Here are 2 pointed images using the above methods, the third using smartsharp:
Original
Original image http://imageshack.us/a/img600/6640/babyil.jpg
First................................................. ................... second
1st http://imageshack.us/a/img803/3897/sharp1.png 2nd http://imageshack.us/a/img809/2235/sharp2.png
my third goal> is that the effect I want is 3rd http://imageshack.us/a/img832/4563/smartsharp.jpg
(4) Here is the tool I used to create the third image above:
smrsharpm http://imageshack.us/a/img210/2747/smartsharpentoolm.jpg smrsharp http://imageshack.us/a/img193/490/smartsharpentool.jpg p>

Answer 1

Unfortunately, it's hard to understand what “Smart sharpen” does without access to Photoshop code. In the meantime, you can try mixing the unsharpen mask, completely filtering the variations and some color adjustment (maybe the hue will increase a bit).

Also see: http://www.kenrockwell.com/tech/photoshop/sharpening.htm#

Update: here is an example of how to remove image blur from an image:

https://github.com/stefanv/scikit-image-demos/blob/master/clock_deblur.py

(the image of the clock is in the same repository). Unfortunately, scikit-image does not currently have mature attenuation / inversion filtering - but we are working on it!

Answer 2

Photoshop's smart sharpening feature uses a mathematical operation called deconvolution inside. numpy has a deconvolve() function, which can probably be pressed to serve this task, but I could not find a ready-made function for smart sharpening using numpy , so you probably have to code it yourself.

An alternative approach would be to do this using GIMP. There's a GIMP plugin (intuitively named "G'Mic") that will perform deconvolution among other sharpening algorithms, and you can automate GIMP using Python.