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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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How to draw a 10-bit color array by ID2D1DeviceContext::DrawImage or ID2D1DeviceContext::DrawBitmap?

I am trying to draw something 10-bit pixel arrays on to the HDR canvas but failed. I add my codes base on https://github.com/vesa-org/DisplayHDRTest The code is inserted into Game::GenerateTestPattern_CalibrateMaxFullFrameValue I could judge from…
Eviluess
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Maximum float value in 10-bit image in WIC

I'm trying to convert a HDR image float array I load to a 10-bit DWORD with WIC. The type of the loading file is GUID_WICPixelFormat128bppPRGBAFloat and I got an array of 4 floats per color. When I try to convert these to 10 bit as follows: struct…
Michael Chourdakis
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Built-in hardware anti-aliasing does not work with HDR rendering in Unity

The document of Unity 2021.1 said Hardware anti-aliasing does not work with Deferred Shading or HDR rendering, but this hint was removed at the documents of Unity 2021.2. so, what happened, what reason makes the hint come out and disappear for no…
uscq
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A grayscale gradient image on an HDR10 monitor seems "whiter" or lighter than that in SDR mode

I'm trying to display 10-bit grayscale images on an HDR10 monitor. A Windows app was implemented by DirectXTK: Using HDR rendering (which is based on Direct3D 11). For the purpose of comparison between HDR and SDR, I also duplicated the same app but…
stanley76726
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How can I tell if an HTML5 video is playing HDR content?

Given an HTML5-based video player that plays arbitrary video files, is it possible to detect when the video is using an expanded color palette (HDR)?
Alan H.
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How to playback HDR content using LibVLCSharp in Xamarin?

I had no success on google, developer.android.com and LibVLCSharp/LibVLC.Android documentation. In the LibVLC documentation, it clearly states it supports HDR, but I found no examples in the git repos of how to enable HDR playback. Google and…
Zananok
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Create simple 2D image preview from panoramic HDR

Is there some really simple and basic code for making preview for HDR images (like getting 2D BufferedImage output or something)? I am using this HDR image. I tried this (it uses TwelveMonkeys), but no success at all (it simply stuck/frozen at…
fafa
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How to get luminance of an HDR image

I am currently working on a project where I have a bunch of HDR images and I need to get the median luminance of each image and plot them. I am trying using opencv but I am unable to find a function or way to get the median luminance of an image. Is…
Naseef Chowdhury
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Convert SDR image to HDR with python openCV?

I wish to do the following in python with openCV to increase the brightness of an image. The aim is to turn an SDR photo into an HDR image (to increase the dynamic range). import cv2 img = cv2.imread("image.png") hsv_img = cv2.cvtColor(img,…
Holding Arthur
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How Could I extract HDR gain Map from iPhone's Heic?

with jpeg format, I know can use: exiftool -b -MPImage2 test-lumen.jpg > depthMap.jpg But if the format is Heic, there is any method can export the HDR gain Map?
taontech
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HDR stacking of images in halcon

I have multiple images that I have to merge to a single HDR image in Halcon. I've been looking online and in the manual, but was not able to find any HDR comand.. How can this be done in Halcon?
sharkyenergy
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Get pixels color value in float (HDR)

Is it possible in Python to read an image and get each pixels color (12 bits depth) value between 0-1 (or 0-255 in float) without doing the conversion to 0-255 -> 0-1 range. This way I won't get precision loss and get the exact color in HDR…
huangkaiyi
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How to compress an HDR video

I have been trying to use VTCompressionSession to compress an HDR video recorded on iPhone - but it comes out as very "washed out". I tried using HEVC codec as well, but that still gives me the same result. Any ideas on how to do this?
user3500462
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Color primaries, Matrix coefficients and Transfer charcteristics

I'm currently working on a software that performs video processing and I've been looking at handling HDR content. I'm currently still learning about this topic and I've been looking into the conversion from HDR content to SDR content. While doing…
Auliyaa
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Integrate Dolby Vision 8.4 Metadata into streams encoded by x265

I have the original video captured by iPhone 13 Pro, with Dolby Vision profile 8.4, HLG. Is there a way I can compress it with x265, so that I can get almost the same quality in a far smaller size. An image from Dolby Vision official website: Dolby…
Bobby
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