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Results tagged with pixel
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user 67201
Questions about pixels. A pixel, is a point in a raster image, or the smallest addressable element in a display device; so it is the smallest controllable element of a picture represented on the screen. The address of a pixel corresponds to its physical coordinates.
5
votes
Counting colored pixels using GIMP
The Histogram dialog is your friend.
When used "raw", if shows an alpha-weighted count of the pixels (in other words, it counts non-transparent pixels). For instance in this image:
Pixels is the cou …
- 17.8k
5
votes
Accepted
How to unlock the alpha channel lock in gimp?
The problem has nothing to do with the alpha-lock. The image is in color-indexed mode, and in that mode many restrictions apply. In particular, in that mode, transparency isn't progressive but binary …
- 17.8k
2
votes
set a ONE pixel image's alpha value using gimp
Quick answer: best solution is to create a 1-pixel layer, set its opacity to 50% using the slider at the top of the Layers list, and export. … So if you want a half-transparent pixel the mask value is
(^ is the power/exponent operation):
0.5 ^ (1/2.2) = 0.5 ^ 0.454545 = 0 .73
(or 186 in the 0..255 notation). …
- 17.8k
1
vote
GIMP - Dithered brush tools
Two-color dithering, mostly usable if you have a tablet:
Add layer, put in "dissolve" mode
adjust brush opacity (with tablet, use Pressure Opacity dynamics)
paint on "dissolve" layer
(brush spacin …
- 17.8k
1
vote
Can not fill or paint on layers in Gimp
For B and C, check the pixel lock.
See here for details. …
- 17.8k
1
vote
Can I make noise on one specific color with gimp
With the image at hand, just use the Color selection to select the green background, then apply any of the noise filters, for instance Filters > Noise > HSV with mostly "V" if you want dark/light pixe …
- 17.8k
1
vote
How do you replace pixel color on all channels including alpha in GIMP?
This is the standard behavior for all the paint tools, they are composited with the current pixels, and do not replace them completely (unless the tool opacity is 100% of course).
If you want to keep …
- 17.8k
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 to Li …
- 17.8k
4
votes
Changing the amount of pixels in an Image in GIMP (or Photoshop) for scaling purposes
If you want "bigger pixels" to make a small image bigger but still pixellated, use Image>Scale image with "Interpolation: none" in the Quality section. This gives something likes this:
If you have …
- 17.8k