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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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HDR gradient on Android not possible?

I am trying to render a smooth gradient from 0% to 10% gray across the screen of Asus Rog Phone 2 which supposedly has an HDR10 screen. In standard (8bit?) rendering mode I can clearly see banding between the gradient levels. I followed the…
erkil1452
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How to correctly handle HDR10 in custom Metal Core Image Kernel?

I've got a custom Metal Core Image kernel (written with CIImageProcessorKernel) that I'm trying to make work properly with HDR video (HDR10 PQ to start). I understand that for HDR video, the rgb values coming into the shader can have values below…
Andrew Madsen
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Why Yuv data readed from ffmpeg is different from original input yuv?

I use ffmpeg to make HDR test video, my approach is write a image, converting the image to yuv420p and then use ffmpeg to make the HDR test video. But I found the yuv data readed from mp4 is different from the original input.. I was stucked in here…
sianyi Huang
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Process HDR10 video on Android with MediaCodec

I want to do tone-mapping of HDR10 on Android use OpenGL ES, the first thing is to get the frame data. On Android after video decoded by mediacodec, its data is on an external oes texture, I want to know what the internal format of the texture is…
wchen61
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How to hide the display of background HDR map, but save hdri's work for lighting in three.js?

I repeat this example in my code: https://threejs.org/examples/?q=RGBELoader#webgl_loader_gltf Source: https://github.com/mrdoob/three.js/blob/master/examples/webgl_loader_gltf.html#L53 HDRI lighting works great. But i cant hide hdr map from…
Егор Яклич
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How to use HDR Colors in an iOS project?

I'd like to utilise the HDR display on OLED iPhone's for my apps to display vibrant colors like I've seen is possible in the iOS game 'FROST'. To be extra clear: I'm not looking for HDR support for video playback or camera capture. UIColor has a lot…
denniswave
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Qt widgets for HDR image display

I'm currently developing a consrol software for a camera that delivers 14 bit/sample grayscale images (specifically it's a scientific x-ray camera). So far I just used the upper 8 bits and passed those to a QImage, so that I could see something.…
datenwolf
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Unity - HDRI Skybox used as lightsource for eye adaptation/tone mapping

I am currently trying to create a scene in Unity which should feature an eyeadaptation/tonemapping system, so whenever my camera is watching on a brighter/darker area it should adjust the exposure value of the HDR Image correctly. Unfortunately…
Vamus
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Convert .hdr to NiFti file conversion in python

I'm currently working on a project which handles .nii files from .hdr images.Is there anyway to convert from HDR to NiFti file in python? Please help. Thanks.
Kamalhasan Battu
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Finding exposure duration of a webcam in time units?

I'm experimenting with HDR capture at the moment and using a Logitech C920 through OpenCV via python. All the camera calibration algorithms I have come across to date require the actual duration of the image exposure or at least known ratios between…
norlesh
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OpenCV MergeMertens gives different results in Python Vs. C++

When I run the HDR Mertens exposure fusion in Python I get weird colors artifact, that I don't get when I run the exact same function in c++. (I just run the HDR Tutorial) Seems to me like some problem with the data types, but I tried every option…
Elad Joseph
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Inconsistent colors in Chrome

Chrome 111 just launched with support for CSS Color Level 4, which means its added support for expanded color spaces beyond just sRGB. Here's a codepen demonstrating a comparison (reproduced below). If your display supports HDR you should see a red…
tvanc
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How to play HDR10 videos using ffplay and ffmpeg?

I'm trying to play on Windows a HDR10 video. My display support 10 bits HDR content. The command that I'm using to play the HDR10 video is the following. ffplay -sws_flags print_info -i video.mp4 But the output looks washed out. the log are the…
befandy
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Tone Mapping HDR medical image (with opencv) using masks

I have mammography images that have a black background and only a small fraction of the image is relevant (breast). I created masks that have 1 in the relevant areas and 0 in the rest. I want to apply the ReinhardToneMapping algorithm, but it…
Kaschi14
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How do I convert an HDR screenshot to SDR using Direct2D effects?

I'm trying to convert screenshots taken on an HDR display via IDXGIOutput6.DuplicateOutput1() into SDR GDI+ bitmaps. The color space of the display is DXGI_COLOR_SPACE_RGB_FULL_G2084_NONE_P2020 and the pixel format is…
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