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172
votes
12answers
22k views

Why are pixels square?

Pixels in screens are square, but I'm not sure why. Both pixelated images look pretty bad - but I'm not sure there's any advantage of squares over hexagons here. Hexagons also divide up into 3 ...
9
votes
8answers
47k views

Green flickering pixels that move with black images

Strange question... Occasionally, on my LCD screen, pixels that should be black flicker rapidly and constantly between black and green, about 4 flickers a second. The crazy part is, unlike dead/stuck ...
9
votes
2answers
112k views

What is standard A4 paper size in pixels for a given resolution?

Is there a standard size of A4 paper in pixels? Dimensions of A4 paper are 210mm × 297mm or 8.27in × 11.69in. For 600dpi resolution, I calculate the paper size in pixels like below: In imperial ...
7
votes
2answers
2k views

How do I tell the dimensions of the current selection in GIMP?

Oftentimes, I need to measure the dimensions of part of an image (in pixels). In Photoshop, I can make a rectangular selection and see the dimensions in the "Info" window (or something like that). How ...
6
votes
2answers
12k views

How to prevent Chrome from blurring small images when zoomed in?

When I'm trying to view pixel art up close, chrome starts blurring the image. I want to make it so that even when the image is zoomed in, I can still see the pixels in crisp detail, not a blurred one. ...
5
votes
3answers
14k views

How to scale a bitmap in Photoshop without anti-aliasing?

I have this pixely layer which I need to scale 200% in both directions. Since the pixels should be exactly double the size, I expect no anti-aliasing. (fuzziness). However, the newly sized image is ...
5
votes
1answer
2k views

Why are red&green pixels moving around on my screen?

The top left corner of my LCD monitor is acting up. The pixels are colored red and green. Not completely on like a stuck pixel, but variably faded. It's a seemingly random distribution, centered on ...
3
votes
6answers
291 views

How widespread are dead pixels?

How widespread is the problem of dead pixels or hot pixels these days? Has the problem become worse with larger monitors and resolutions or become better with better build quality? Do any hardware ...
3
votes
2answers
21k views

What is the pixel clock setting on my monitor actually doing?

I am experiencing display interference on a dell 24" flat panel monitor.I find that if I adjust the pixel clock settings up or down in the monitor's on-screen menus, the interference goes away for a ...
3
votes
1answer
3k views

Add or remove single pixels from selection in Photoshop?

Sometimes in Photoshop I'm working with images at very close-up levels, such as small animated GIFs and emoticons. Often I'm zoomed in all the way, working at pixel level. If I've got a selection ...
3
votes
1answer
258 views

4k Monitor. Higher PPI than iMac 27". More Pixelated than iMac

I'm looking to understand exactly why a monitor with higher number of pixels per inch (albeit slightly so), than the standard 27" iMac, cannot produce image that is at least just as sharp as images on ...
3
votes
1answer
616 views

Is there a way to eyedropper colors WITH transparency, and paint with that color?

Here's my use-case: I'm doing a pixel art sketch, and one of my layers involves glass with partial transparency. I'd like to be able to: Eyedropper the transparent color and have it automatically ...
3
votes
2answers
99 views

What is better for eyes: higher pixel density vs larger screen size?

I am usually spending over 8 hours a day using PC at worktime, that's why I want to buy a monitor that will be most comfortable for my eyes. I decided to buy 4K display since I usually buy such things ...
3
votes
2answers
191 views

How to vector a logo?

I'm trying to convert the logo I've built in photoshop to a vector so I can resize it to fit different app and mobile screens. I've tried the live trace in illustrator function but that just distorts ...
3
votes
0answers
401 views

Minimum number of pixels per digit for the human eye?

How many pixels per digit do I need for the huhman eye to be able to recognize that digit? I need to cover a rather big area and identify ID codes. The digits are 10 cm high and maybe 8 cm wide. ...
2
votes
1answer
255 views

Get image pixels of prescribed color

I have an image (PNG or JPG) inside which there is at least one pixel of a certain RGB color I know in advance. I want to find the pixel(s) of that color For example, I may have image.jpg, inside ...
2
votes
1answer
244 views

Displaying random pixels on LCD

Will it damage my LCD screen if I display a stream of continuously changing randomly colored pixels, at the monitor's refresh rate, for a long time? As in, will it damage it any more than displaying a ...
2
votes
2answers
999 views

Photoshop cs5 - Subpixel sizes

Is there a way I can disable subpixel work for a specific document? I'd like to be able to move an element on a full pixel grid instead of subpixels, preventing stuff to be placed at 128,23 Y-axis for ...
2
votes
2answers
2k views

How to get rid of light border around inserted images in Microsoft Visio?

When inserting a raster PNG image into Microsoft Visio 2007, it tries to make it smoother by interpolating pixel colors. It seems like Visio interpolates border pixels with white as if image was ...
2
votes
1answer
236 views

Why don't monitors have more pixels per inch? [closed]

72 ppi is nothing. And we have been stuck with this for 20 years. Why do we need to resort to stupid tech like anti-aliasing instead of resolving the core of the issue, more pixels per inch!!! It is ...
2
votes
1answer
62 views

Explain the correlation between PPI and resolution

I understand this is a very novice question to ask but I just want to make sure I have a firm grasp on the concept(s) Resolution is how many pixels displayed on a screen by height x width. How does ...
2
votes
1answer
2k views

Windows command line - get pdf page width and height in pixels?

I need a piece of software (a freeware preferably) that will display what is the pixel width / height of a pdf page. If there are many pages with different dimensions, I'd be enough to just get the ...
2
votes
1answer
218 views

Software for “OCR”'ing exact pixels from a photo of a videogame/pixel-art?

I am searching for software that can reconstruct the exact pixels from a photo of an old videogame or a piece pixel-art. The goal would be the re-digitalization of digital images that only survived in ...
2
votes
1answer
409 views

How can I encode a video for my non-square pixel display?

My car stereo has a 800x480 display but is physically 16x9 so I believe it uses non-square pixels. The documentation says it says (2 400x480) so I think it's describing a 2:1 pixel aspect ratio (?). ...
1
vote
3answers
43k views

How many pixels is the A3 format?

The A3 format gives the dimension in centimeters, but if I draw an image programmatically I may know just the pixels, for example I have an image of 800x1200 and so on ... So the question is: I must ...
1
vote
1answer
6k views

How to know pixel values precisely?

How to know one single pixel RGB and transparency values precisely in Photoshop? Using eyedropper tools I seem not to be able to do that, i.e. it shows RGB=(0,0,0) on partially transparent pixels ...
1
vote
1answer
1k views

Red dot appearing and disappearing on monitor

I just bought a full HD Acer LED monitor (21.5'') and noticed that there was a red dot on the right hand side - sort of like a dead pixel. After a few days, this dot disappeared. A few days later, ...
1
vote
2answers
223 views

Monitors with different pixel sizes

I have several monitors with different pixel sizes (that is, size of individual pixels; not resolution). This means that when I put them next to each other and move the mouse between them, it's not ...
1
vote
3answers
4k views
1
vote
1answer
1k views

Show Pixel ruler in Visual Studio 2013

I use Visual Studio 2013 and want to use a Pixel ruler in the designer. I saw some screenshots on the internet but don't know how to display the ruler or if I have to install a plugin or something.
1
vote
1answer
1k views

How to calculate bytes need for an image with 256 level gray scale

When the size of a still image is 1,600 x 1,200 pixels and each pixel has a 256-level gray scale ranging from 0 to 255, approximately how many megabytes are needed at least to store five such ...
1
vote
1answer
585 views

Alternative to DPI Scaling

Is there an alternative to DPI scaling (I am open to third-party programs) which makes items look less pixelated at high DPI settings? I have a 15.9" laptop screen with a 1920x1080 screen. I'd like ...
1
vote
1answer
3k views

Average PPI used?

Throughout all laptops and desktops what is the standard pixels per inch (PPI) used? Does it vary throughout screen ratio? I found mine to be 100ppi, the real world measurement was 4 pixels more.
1
vote
0answers
23 views

What are dark pixels on my SONY PRS-T1 Ebook Reader? [closed]

Has anyone experienced this? What is this dark pixel on my SONY PRS-T1 Ebook Reader shown in the image?
1
vote
0answers
138 views

Adobe Illustrator changes dimension to .001

I'm working in a document with properties and rulers set to pixels. I have several different closed paths (some are simple circles with 1px stroke, others are not-so-complex compound paths). The ...
1
vote
1answer
230 views

How do I disable Magnifier's “smoothing” filter in Windows 7?

I would prefer to have a "nearest-neighbor" scale mode in the Magnifier (where each original pixels is rendered as a large square, not blurred between eachother). Is there an option to change that, ...
1
vote
2answers
1k views

Get pixel coordinates of cursor in PDF? [closed]

How can I see the page-relative pixel coordinates (x,y) of the cursor while viewing a PDF? A solution for Windows, OS X, or Ubuntu is fine. I know this can be done in Photoshop, but I don't own ...
1
vote
1answer
74 views

Seeking pixelated font

I'm seeking a font graphic (images, not TTF format or something that needs to be useable by a computer) that fits in 9 by 9 pixels. Can anyone recommend a free source, or a simple technique for ...
1
vote
0answers
177 views

Get average image from video

In Ubuntu 10.04, is there a program that I can install (or is pre-installed) that can get the mean color value of each pixel from a video. The purpose behind this is to see if the result of getting ...
0
votes
2answers
743 views

Scrolling pixel-by-pixel with direction pad in Mozilla Firefox

Is there a configuration setting in Firefox that allows me to control using the arrow keys to scroll into a direction by 1 pixel?
0
votes
2answers
203 views

How Supersampling Anti-Aliasing works?

From reading online I understand the basic idea of how Supersampling Anti-Aliasing works, it renders the scene at a higher resolution that the user's display, uses the extra pixels to calculate an ...
0
votes
3answers
522 views

Does changing a display's resolution turn display's pixels off?

When a display (LCD, LED, OLED, etc) changes its display resolution, are pixels on the display "turned off"? Meaning, are the same number of pixels on the display being used to show an image with ...
0
votes
2answers
532 views

Color detector program

I used to use the program Color Detector. Simply run the program, point the mouse cursor anywhere on the screen, and the color detector window will display the RGB values, HTML hex code, and ...
0
votes
3answers
6k views

Bright 2x2 pixel spot on laptop display

I have a Samsung NP550P5C laptop with a problem on the display I've never seen before: it has a 2x2 pixel area that is considerably brighter than the rest of the screen area. Here's a closeup: The ...
0
votes
3answers
76 views

What's meant by work resolution in reference to a LCD screen of a desktop?

My Acer LCD's Work Resolution is 1600*860 pixels. But I have no option to set it. I do have options 1600*900. Windows says that I am at recommended resolution 1600*900. But I see Red Shading all over ...
0
votes
2answers
11k views

How to create transparent pixels in photoshop CS4

I want to create a .png icon with transparent pixels to show what is beneath. How do I change the white pixels to be transparent using Adobe Photoshop CS4?
0
votes
2answers
21 views

my screengrab is a different pixel size in photoshop to the browser

I am having trouble understanding why when I inspect an element in my browser (viewing at 100%) it gives me a pixel size which is different to the screengrab opened in photoshop. As you can see ...
0
votes
1answer
15 views

Transfering objects between images in GIMP

When I mark and drag over and object from one picture to another it changes colors (to the other pictures palette) and that makes it look really bad. How can I prevent that?
0
votes
1answer
173 views

Different pixel attributes of images/frames in a video [closed]

What different attributes can a pixel of a video file contain? For eg, rgb values, sharpness etc. Does every type of video files and images have all these attributes or only some that are new ...
0
votes
1answer
18 views

Notebook displaying marks of text from programs opened for too long?

Using my Macbook Pro Retina, when I have the same program somewhere on the screen for too long and close it, I can see a mark of it's letters on that place of the screen. Is that common or a ...