28
votes
Accepted
What does Photoshop's "High Pass" filter actually do under the hood?
High pass is the opposite of gaussian blur
If you take an image and blur it you only keep the "low frequencies". High pass makes the opposite, it only lets the "high frequencies" pass, or what most ...
- 2,009
26
votes
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In GIMP, how can I identify and match the saturation of an image
I think there is some major color profile confusion going on here.
When I download the low res version with the vibrant colors you like, I notice that its color profile is Adobe RGB. The hi res ...
- 20.5k
18
votes
What filter is used on this image?
The filter is called a human. ;-)
The colors are so cleanly separated per depth layer, and the geometries are perfectly repetitive (eg the constant thickness of the beams) that this is human-made.
So, ...
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15
votes
In GIMP, how can I identify and match the saturation of an image
Looking at the pictures you posted, it seems to me that the ones you consider "duller and less vibrant" are actually higher quality images, not just in resolution, but in color information.
...
- 351
13
votes
How is this red/blue effect created?
This is very likely a gradient map, which allows you to map different colors to the luminosity of a given picture.
There's more than one way to apply a gradient map:
Select the desired layer, then ...
- 361
13
votes
Accepted
Generating a circular image from planar source
That's exactly what the Polar Coordinates filter does (Filter → Distort → Polar Coordinates...).
Since you want a circle you'll need to distort the image in to a square first (otherwise you'...
- 40.3k
9
votes
What filter is used on this image?
That is most likely a vector drawing, and has most likely been vectorized by hand. It's possible some reference photos were used. I suspect it has been done by hand because the vectors are made up of ...
- 82.5k
8
votes
Can I improve this logo design with any effects or filters?
I second the comment on your post. The original image is better, to my eyes, than the "improved" version. With respect, I think your thinking is back to front.
Firstly, good job with the logo, ...
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7
votes
What does Photoshop's "High Pass" filter actually do under the hood?
A high pass filter is a fitter that removes low frequency information form a singnal. Now there are many ways to implement a high pass filter, but photoshops high pass filter most likely is the result ...
- 57.5k
7
votes
In GIMP, how can I identify and match the saturation of an image
You can apply the colors of the low-res image to the hi-res image quite easily, because our perception of the details is mostly based on luminosity and not on color or saturation(*).
Open the high-...
- 15.9k
5
votes
What does Photoshop's "High Pass" filter actually do under the hood?
None of the answers so far have touched on the maths behind the filter. Here's a detailed writeup from which I quote:
Frequency filters process an image in the frequency domain. The image is ...
- 801
5
votes
Filter, Script or Effect for smudge design
This is not as hard as it seems to do, in either Illustrator or Photoshop. I would prefer illustrator as i would get all vector. This is what you do:
Rotate the image (for easier drawing), to the ...
- 57.5k
5
votes
How can I mimic a used magazine cover (crease, earmark, cracks) with Gimp?
You could use a paper texture. Either find an old worn piece of paper and scan it, or find a texture to use online, then paste it on its own layer above the main image layer, and change the blending ...
- 82.5k
5
votes
Is there a filter to 'reverse Emboss'?
In fact there are a range of tools for extracting and extrapolating "texture maps" for 3D modeling textures based in a single input photo, and they can create heightmaps, reliefmaps, base colour maps ...
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4
votes
How to resample an image with lanczos-3 filter using imagemagick?
This question is somehow wrong in many ways but warrants an answer nonetheless to get you onto the right track.
There is no image when you have no post processing of the Lanczos filter. See the filter ...
- 57.5k
4
votes
Accepted
How would one create a high contrast, grainy look in Photoshop?
I would use pattern to make the stripes, other than that the process is similar to Storm Brewer's addition to the Ashlee Palka method.
Sample image, credit goes to @tylerbarnes from Unplash.
Create ...
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4
votes
How would one create a high contrast, grainy look in Photoshop?
To achieve a "high contrast, grainy, almost cool grey-blue look", try following these steps:
Choose your image. I chose one of my favorite bouldering pics.
Use a couple of adjustment layers. For ...
- 1,694
4
votes
Accepted
4
votes
How is this red/blue effect created?
Here's a quick method to get you started. To get the polished look (like in your example) just spend more time on your masking to get a more mixed selection that will come across as more professional. ...
- 1,694
4
votes
Accepted
Which filter did I apply on my picture?
It looks a bit like the G'MIC Multi-Layer Etch, in the Black and White filters section in G'MIC. Sorry can't be sure of the exact settings - I'm sure you can experiment
But here's the example using ...
- 82.5k
4
votes
Accepted
Recreate water texture in Gimp
You can download the Horizon2 gradient here - put it in your GIMP gradients folder - on Windows it's located at C:\Users\Your User Name\.gimp-2.8\gradients folder, then restart GIMP.
Running the ...
- 82.5k
4
votes
Filter to preview result of laser-engraving of photo
The question may be more suited to a laser related forum, as the answer lies with the characteristics of the laser more than with the graphics program. My experience with my laser is that one has to ...
- 2,757
4
votes
Accepted
How can I "apply" a filter permanently without rasterizing?
The problem is that the Greyscale Filter is an SVG filter, and these can't be expanded to vector only. When saved as a PDF, SVG filters must be rasterized because the format doesn't support SVG ...
- 82.5k
4
votes
How to make this exact textured glass effect in Photoshop and Affinity?
Something resembling can be got by inserting a periodic (stripe width) geometric distortion which affects only horizontally. In addition to emulate "it's made of glass, which causes also gloss ...
- 366
3
votes
In Gimp how to take the brightest value of each color channel for every pixel?
No need for specific filter...
Color>Components>Decompose and use RGB Model, you get a grayscale image where each layer is one of the RGB channels of the original image
Set the top two layers ...
- 15.9k
3
votes
Photoshop: Lens Correction filter not available
Make sure your document in not CMYK, as the 'Lens Correction' filter only works with RGB or Grayscale documents.
The filter works only with 8‑ and 16‑bit-per-channel images in RGB or Grayscale mode....
- 29.1k
3
votes
Accepted
Recreating a grayscale cutout effect on an image
It looks to me more like an Image Trace from Illustrator than a Cutout effect from Photoshop. The result is similar, but you have more control over the paths with an Image Trace and Image Trace ...
- 40.3k
3
votes
Can I improve this logo design with any effects or filters?
Simplify the design. Start off my converting to a vector format - no logo should ever be done in a pixel format, since this will limit the use of the logo to that specific size or smaller sizes only.
...
- 3,618
3
votes
Accepted
How do I "pin" a filter in the Inkscape interface?
Inkscape lets you overwrite many parts of its UI with special files in your config folder. However, it requires some technical know-how, is somewhat complicated and mostly undocumented, I think.
You ...
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Only top scored, non community-wiki answers of a minimum length are eligible