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Questions tagged [pixel]

A pixel is the smallest unit that can be represented or controlled on a display. The word pixel is derived from the phrase "picture element".

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Line rasterisation: Cover all pixels, regardless of line gradient?

Basically, I want to use a line algo to determine which cells to check for collisions for my raycaster. Bresenham isn't great for this as it uses a unified-thickness approach, meaning that it ignores cells that aren't at least half-covering the…
Steffan Donal
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Is it possible to change the color of one individual pixel in Python?

I need python to change the color of one individual pixel on a picture, how do I go about that?
rectangletangle
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Can you have multiple pixel (fragment) shaders in the same program?

I would like to have two pixel shaders; the first doing one thing, and then the next doing something else. Is this possible, or do I have to pack everything into the one shader?
Harry
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Get pixel color from an image

I have an image on a browser. I want to get the top left pixel of the image color (at coordinates: 0,0), no matter whether the image is rotated or not. How can I do that, using javascript or php code?
Eitan
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python tkinter: how to work with pixels?

using google (and this site) i have seen some similar questions but my problem is still here: "i want to draw an image (without reading a file) , being able to manipulate every single pixel's colour in that image." i have seen another question where…
Alberto Perrella
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How to display pixels on screen directly from a raw array of RGB values faster than SetPixel()?

I enjoy making "animations" in c++ such as a MandelBrot Set zoomer, Game of Life simulator etc. by setting pixels directly to the screen frame-by-frame. The SetPixel() command makes this incredibly easy, although unfortunately it's also painfully…
Can_of_awe
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How to Change Pixel Color of an Image in C#.NET

I am working with Images in Java, I have designed more over 100+ images(.png) format, They were all Trasparent and Black Color Drawing. The problem is, Now I have been asked to change the color of the Drawing (Black -to ). I have searched many code…
Bibi Tahira
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what is display's logical resolution?

I encountered this concept: device pixel ration, some said it is the ratio between physical pixels and logical pixels. For example iPhone has: Physical resolution: 960 x 640 Logical resolution: 480 x 320 so does it mean that the height of each…
Blake
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blurring an image using PIL in python

I have been trying to blur an image using the PIL. from what I know i need to copy the image, and then change every pixel to the average of the pixels surrounding him, from the original picture. so I didn't get really far, i'm using python 3.3x from…
Mumfordwiz
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Pixel to MM equation?

Is there a reliable equation to work out pixel size to MM? Or is that not possible cross device? We are working with a bespoke system that delivers content to many devices with different screen sizes, it can detect the screen width in MM, but we…
Dancer
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Commonly used pixel sizes for webpages and their pros/cons

What are the most commonly used pixel sizes (primarily widths) and what are there advantages and disadvantages? How can I best find a happy medium to give a good experience to people with a wide variety of monitor sizes? An answer with an…
Nachshon Schwartz
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How can I stretch bitmap in WPF without smoothing pixels

I'm working on SEM image processing application, written in WPF. I have an image display control, derived from Canvas, which displays image & overlays using DrawingVisuals (one for each "layer"). It also implements Zoom & Pan using scale & translate…
Zbynek Vrastil
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Flutter screen size calculation

I am getting sick trying to adapt my app to a certain tablet dimensions using flutter. The tablet is a Samsung Galaxy Tab S5e with screen of 2560x1600. When I make flutter return the screen dimensions using: print("Size W is…
codeKiller
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Relation between dp - sp and PX

I am not asking what is the difference between dp,sp and px. I am designing a website based on google's new material design, all the measurements are in dp (for grid) and sp(for text). My question is how do they translate to pixels. I have been…
chandan
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swscaler warning : deprecated pixel format used

I want to perform a color space conversion of my video frame before converting it to an opengl texture with the following code: struct SwsContext * pSwsCtx = sws_getCachedContext(NULL,width, height, codec->pix_fmt, width, height, AV_PIX_FMT_RGBA,…
Martin Delille
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