21
votes
Are pixels in Photoshop logical or physical?
A pixel is a pixel is a pixel.
Resolution (as in PPI/DPI) is meaningless* in a digital context, the only time it is meaningful is when you are printing (or otherwise transferring to a physical medium)...
- 40.8k
20
votes
Accepted
How to edit a pixel without modifying surrounding pixels
You'll want to use the Pencil tool instead of Brush tool. It allows you to do pixel level edits without any anti-aliasing (the fuzzy area). It's located below the Brush tool or can be accessed by ...
- 23.1k
17
votes
Accepted
What is pixel aspect ratio?
On a normal monitor imaging element is in a square matrix. We then call the aspect ratio of that pixel 1. Aspect ratio is just the width/height. A aspect ratio of 1 is a square and a aspect of 16/9 is ...
- 58.3k
16
votes
Dot vs. Pixel - rudimentary explanation
In simple, rudimentary, terms...
A dot is the smallest possible spot of ink on paper.
A pixel is the smallest possible spot of light on a screen.
Dots are never on a screen and pixels are never on ...
- 211k
14
votes
Accepted
Dot vs. Pixel - rudimentary explanation
(It's clear now that a simple answer to this question doesn't exist. Our language simply isn't precise enough. I like the two other answers, but would still like to give an answer seen more from the ...
- 21.3k
13
votes
Accepted
Modify pixel art size without losing aesthetic
While transforming, you should set your 'interpolation' to 'nearest neighbor'.
Select the layer your foreground is on;
Press Cmd / Ctrl+T or choose Edit > Free Transform... to enter Free Transform ...
- 25.3k
12
votes
Can I have layers with different pixel resolution in Photoshop?
Not exactly, but...
... there is a way to achieve the effect you describe.
Apparently you can change the scaling mode for smart objects, but it's a global setting that takes effect for newly created ...
- 336
11
votes
Can I have layers with different pixel resolution in Photoshop?
No this is not possible. To be entirely sure I went through every option that the layer has.
A workaround might be setting up guides with the size you want the pixels to be and then using the Pencil ...
- 505
11
votes
Accepted
Can I have layers with different pixel resolution in Photoshop?
No.
I'd approach it one of these two ways:
Use a multiplier for your pixel brush size, and just use nearest neighbour interpolation to resize your image to the correct size without deforming it. (...
- 8,189
11
votes
Accepted
Why pixels do not weight the same? (in bytes)
Compression efficiency
A naive bitmap encoding stores all the pixel values directly. However, since there almost always is some redundancy in the image data, compression can be applied to reduce the ...
- 236
10
votes
Is there a way to count the number of pixels of each colour in a picture?
You could do it with GIMP which is free, open source, and works on Mac, Windows, and Linux.
Open an image in GIMP, using File > Open
In the main menu click Windows > Dockable Dialogs > ...
- 87.8k
7
votes
Ctrl + Click on thumbnail in a layer is not selecting a particular area in photoshop cc 2014 & 2015
Your layer has no transparency or mask. That's why Ctrl+clicking the layer thumbnail isn't working.
I don't have a copy of CC 2015 to go through the background removal tools that were available back ...
- 87.8k
6
votes
What is pixel aspect ratio?
The View → Pixel Aspect Ratio setting in Photoshop simulates non-square (elongated, rectangular) pixels on a square-pixel screen, primarily for preview purposes.
Photoshop does this simply by scaling ...
- 171
6
votes
Are pixels in Photoshop logical or physical?
It's only for print/manufacturing conversions. The operating system does not, most of the time, know what kind of screen is attached to the computer. So it does not even try to guess. Because it can ...
- 58.3k
6
votes
Dot vs. Pixel - rudimentary explanation
This is more like a long comment than a answer.
The reason why you fail to get this is simply you have no need for this information. The only way you can ever understand this is if you care about the ...
- 58.3k
5
votes
Accepted
Rounded rectangle with non-square pixel aspect ratio
This appears to be a bug in Photoshop. It might be worth reporting to Adobe as I can't think of any reason that the current behaviour would be desirable.
I've come up with two potential workarounds:
...
- 9,534
5
votes
Accepted
Is a DOT comprised of many PIXELS?
I like a lot the reasoning of the question. I will break a little a rigorous analysis for the sake of making this answer as simple (and practical) as possible.
Each dot consists of more than one ...
- 37.9k
5
votes
Is a DOT comprised of many PIXELS?
Pixels have no size. Pixels are not a physical entity, they don't exist. You can't hold them, you can't touch them, you can't measure them. A pixel is merely the smallest increment your screen can ...
- 211k
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 (...
- 17.6k
5
votes
Accepted
How to delete pixels from image?
You are mixing concepts. That is a vector image which does not use pixels. Deleting pixels is better done via Photoshop, but to fix your current situation:
hit A
click each black box and hit DEL
- 29.6k
5
votes
Why pixels do not weight the same? (in bytes)
White.. (all) pixels R255G255B255
Black line... (x) pixels R255G255B255 and (x) pixels R0G0B0
Red line... (x) pixels R255G255B255 and (x) pixels R255G0B0
1 Red Square .... (x) pixels R255G255B255 and (...
- 211k
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 ...
- 17.6k
4
votes
How to create a one pixel pencil brush in Gimp?
In the "Brushes" window: Create a new brush:
Set the brush settings as shown in the screenshot:
- 141
4
votes
Accepted
Calculating dots per pixel when printing an image
From the article:
For example, if you are printing a 150ppi image at 600dpi, each “pixel” will consist of 16 dots (600 dots/150 “pixels” = 4 rows of 4 dots per “pixel”).
600 divided by 150 is 4, ...
- 40.8k
4
votes
GIMP: How can I make a basic 4px brush?
Use the Pixel (1x1 square) brush (NOT "1. Pixel" brush!!!) :
This brush has its hardness set to 0, and thus doesn't exhibit the 3x3 pixel issue you have encountered. It uses the size set ...
- 3,181
4
votes
Convert PX to DP
Photoshop uses PX as a unit of measure for the forms and in development the app uses DP, I know how the conversion works From PX to DP
The conversion will depend on how the original design in ...
- 12.1k
4
votes
Accepted
How strictly should the 300dpi rule be followed?
Not strictly at all. There is in fact almost no difference between 275 PPI and 300 PPI. The biggest risk is that you get moire on your screens, which is more or less a hit or miss thing.
Also you ...
- 58.3k
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 ...
- 17.6k
4
votes
Can I have layers with different pixel resolution in Photoshop?
I don't think you can set different resolutions for different layers, however if you build your low res piece in it's own document and then place that object over a high res photo, you would get the ...
- 53
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