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Questions tagged [hdr]

High Dynamic Range (HDR) is a term used for image and video, referring to an extended range than normal 8-bit-per-color channel precision, enabling representation of a wider range of luminance and complete color gamut.

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Visible gradient/tiered blending in many overlapping particles

I have a particle system for creating "nebulas" in a 2D space game. The results are looking pretty good, except there's a rendering/shader issue with what I'm doing. In game I see a rather ugly tiered blending, almost like I'm looking at 6-bit color…
Semimono
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Detect HDR mode on tvOS

I'm making an Apple TV app and need to play one of two video files based on whether the Apple TV is in HDR mode or not, but I can't find a way to detect HDR mode. Does anyone know how to detect this? All I can find is UIScreen, and it only seems to…
Euroclydon37
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Multiple inputs to a convolutional neural network with one output?

Is there a standard way to input multiple images into a CNN and condense the information down into a singular image in the end? I'm working on an HDR dataset where you have multiple images of the same scene and put them together to form an image…
simonjoh
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How to get frames from HDR video in scRGB color space?

I want to create a simple video player that will show HDR video on HDR TV. For example, this "LG Chess HDR" video. It is encoded with HEVC, its bit depth is 10 bit, pixel format is YUV420P10LE and it has metadata abount BT2020 color space and PQ…
Виталий Синявский
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Encode HEVC/H.265/HDR Video for YouTube from 10bit Pro-Res using FFmpeg

I want to have an HDR YouTube video published, my source file is either an Apple ProRes or DNxHR using a chroma subsamplig 4:4:4 or full RGB, both 10bit, so the original source file has all what is needed in order to be encoded into a 10bit 4:2:0…
Rodrigo Polo
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Different results using imread function in matlab/python for HDR imaging

I am currently working on a python/opencv implementation to create a HDR Image out of images with different exposures. I found an matlab code example, which has a function, that I am not understanding. function [ red, green, blue ] = sample( image,…
Busofyan
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OpenCV HDR processing giving offcolored output image on iOS

I'm trying to get OpenCV to produce hdr images on iOS with 9 pictures that I've supplied it (-4.0 to 4.0 EV's, increment of 1), but the pictures are coming out looking off. Everything has this weird milky filter look to it, and outside the window…
Nick Starr
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How can hdr histogram footprint be constant

I fail to understand the very basic concept of HDR Histogram: The HDR Histogram maintains a fixed cost in both space and time. A Histogram's memory footprint is constant, with no allocation operations involved in recording data values or in…
yuranos
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OpenCV HDR processing producing bad output on iOS

I am trying to create an HDR image from 7 images taken with different exposure values on iOS. I used the OpenCV cocoapod and followed this GitHub repository to implement HDR processing. I have got the fusion image working and it has a decent picture…
mateishungary
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How to use anisotropy at MeshStandardMaterial?

I use this example to add Sphere at the scene I set only EnvMap to the Sphere and remove all other maps (Map, NormalMap, Rougness, Metalness). And I see anisotropy problem. All mesh with rectangles. I tried to set anisotropy for envMap. But now I…
Alexander
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32bit float image format getpixel?

How would I use 32bit float images with C#? I would prefer to use openExr but, tiff or similar would be fine as well, basically I just want to load an 32bit float (32bit per pixel / channel) image from disk and get the pixel values of a single…
Patrik Fröhler
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Convert Texture2D to EXR (HDRI)

I am looking for a way to convert Texture2D directly to EXR format in byte array. I've done few research and this seems to be complicated than I thought. Not really looking for a code since I don't have one. Just a suggestion on how to do this.
Programmer
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Render from HDRi LatLong map directly to floating point cubemap - not HDR

I have an HDR radiance environment map as a LatLong 2D texture image that I want to convert to a cubemap. I do this by loading the HDR map as a 2D float texture, project it onto a cube and then render the scene inside this cube from 6 different…
Djemon
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Timothy Lottes generic tonemapper

I'm looking at presentation by Timothy Lottes where he derives a generic tonemapper (slides 37 and following). Although the purpose of the different parameters is explained nicely I find it quite hard to adjust them properly. I wrote a simple script…
B_old
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threejs hdr environment map in editor

I want to expand the threejs editor to be able to load hdr environment maps similar to this example: http://threejs.org/examples/#webgl_materials_envmaps_hdr I loaded the example code succesfully in app.js Start() function, somehow when the exact…
ThomasP
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