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Questions tagged [pixels]

The tag has no usage guidance.

4
votes
2answers
93 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 ...
3
votes
1answer
134 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 ...
4
votes
1answer
84 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-...
4
votes
1answer
66 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 ...
12
votes
3answers
5k views

How is Anti Aliasing Implemented in Ray Tracing?

After reading a few articles online I am can confidently say I am clueless on how Anti-Aliasing works when Ray Tracing. All I understand is that A Single Pixel/Ray is split into 4 sub-pixels and 4 ...
5
votes
1answer
391 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
607 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
108 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
4k 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 ...
3
votes
1answer
149 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
1k 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
333 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 ...