Questions tagged [pixels]
The pixels tag has no usage guidance.
18
questions
2
votes
2answers
52 views
Why do some videos look smoother and others don't on the same monitor
I have a Dell monitor with 60 Hz refresh rate and therefore games playing on it are not very smooth as compared to 120 hz.
But when I open videos on YouTube of the same game on the same monitor, some ...
0
votes
0answers
47 views
Can ambient light reflection of a surface be larger than diffuse reflection?
According to Phong's reflection model, there are different reflection constants (k) and different intensities of the light source (i) for ambient, diffuse, and specular terms:
$I_p=k_ai_a+\sum_{m \in ...
1
vote
1answer
37 views
Paint pixels on the image around the cursor for painting application
I'm trying to create a simple painting application. And I was wondering about an efficient way to draw pixels on the screen.
I have a pixel struct:
...
1
vote
0answers
49 views
Infinite 2D Coordinate Space
I am working with a 1 dimensional array of an RGBA struct composed of unsigned 8-bit integers. I have implemented a very basic line algorithm, and can draw lines from one point to another accurately, ...
1
vote
0answers
179 views
Which is more important : Texel or Pixel rate? [closed]
I would like to know which is the most important ? More particularly in games or for the display of a desk (ex KDE Plasma, Windows 10 ...) ?
0
votes
0answers
249 views
Sub pixel rendered white text on black background changes color when resized to a very small size
download: https://upload.wikimedia.org/wikipedia/commons/5/57/Subpixel-rendering-RGB.png
The above picture is an example for sub pixel rendering. I tried resizing the image to very small size in ...
5
votes
2answers
481 views
Difference in pixels between different monitors' sizes
If I have an image of x/y resolution and display it on a monitor, does this mean that between a 15-inch monitor and a 42-inch, the same amount of pixels (x/y) will be displayed, only that each pixel ...
4
votes
1answer
396 views
Do we ever consider the size of the pixel to calculate the color in Ray Tracing?
From what I'm reading, it looks like a ray tracer views a pixel as one color and computes that color using the ray starting in the center of that pixel. Yet a pixel has a width and a height.
Do we ...
3
votes
1answer
721 views
What is a scaling factor of the screen?
I'm reading DXGI flip model article and some parts are not clear:
DirectFlip with panel fitters: Your window client region covers the screen, and your swapchain buffers are within some hardware-...
3
votes
1answer
107 views
human visual: relation of Distance and DPI
I was told that human's visual sharpness is 60 pixels per degree. As such, pixel per inch is approximately given by:
PPI = 1/ (Distance * tg((1/60*pi/180) )
Is ...
14
votes
4answers
12k views
How is Anti Aliasing Implemented in Ray Tracing?
After reading a few articles online I can confidently say I am clueless on how Anti-Aliasing works when using Ray Tracing.
All I understand is that A Single Pixel/Ray is split into 4 sub-pixels and 4 ...
4
votes
1answer
515 views
Pixel packed texture source
I am grabbing video from a web cam using Microsoft Media Foundation. The image data is in YUY2 format. The pixels are packed in a 4:2:2 ratio. The color format is YCbCr. The color data gets repeated ...
7
votes
2answers
1k views
Estimating real world object distance from photo
I'm not really sure if this is possible but it should be.
I currently have a photo of a sphere, whose radius I've measures physically. Knowing the apparent size of the sphere from the photo and all ...
6
votes
2answers
117 views
Is there a image-format that support an array per pixel?
For a project dealing with deep semantic labeling of images I need a format that supports arrays of arbitrary length for each pixel of the image.
The array is an array of integers.
Which image ...
16
votes
3answers
5k views
Why do we have graphics frameworks like OpenGL and DirectX, when games could just draw pixels directly?
Games and other graphically intensive applications use frameworks like OpenGL and DirectX. Also they require features like pixel shader and DX12.
But why would we need all these frameworks and GPU ...
2
votes
1answer
396 views
Does this type of memory-mapping for a display exist?
Most information about memory mapped displays on the net are about those in which there is essentially a location in main memory for each pixel on the display. A hypothetical 1024 x 512 display would ...
11
votes
2answers
2k views
Could a hexagonal pixel array store an image more efficiently?
Most computer monitors and televisions have a rectangular array of pixels arranged on a square (or nearly square) lattice. Would a hexagonal lattice give better image quality for the same number of ...
10
votes
3answers
565 views
What is the optimal radius of gaussian distribution for determining pixel colour?
Using a gaussian distribution of points on an image plane to calculate a pixel value, what radius/standard deviation will give the most information in the final image? Too large a radius gives a ...
