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.
Questions tagged [hdr]
167 questions
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ARCore SceneForm HDR Room image
By default Arcore/Sceneform uses a room as HDR environment image. How do I replace it?
Default HDR Room
user4789936
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Open .hdr .stx .prj and .flt in R
I am looking to plot a raster of precipitation data, and have access to a folder containing .hdr .stx .prj and .flt files. Would you have any advice on how to open these files or one of them in R to access the precipitation data? Thank you very…
Cecile
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OpenCV on iOS producing milky/off-colored hdr images?
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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Cannot write to Z channel using OpenEXR
I'm trying the read/write examples in the following official documentation:
ReadingAndWritingImageFiles.pdf
But I can't write to the Z channel. The image is all black in exrdisplay(the official EXR viewer) even the exposure is max.
If I replace 'Z'…
chaosink
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How to do HDR capture based on HAL3?
I want to do HDR capture based on HAL3, but i have two problem now.
Problem 1: We know that HDR need to snapshot three image. It can be realized by sending three capture requests, but i don't think it's a good idea. So do you know how to solve this…
HolyHBW
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How to quickly iterate over and modify pixel arrays with numpy?
First off, i am relatively new to Python and its libraries.
The purpose of the following code is to convert a HDR image to RGBM as detailed in WebGL Insights Chapter 16.
import argparse
import numpy
import imageio
import math
# Parse…
tomfulghum
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Download framebuffer as HDR
In an HTML5 canvas 2d context the method toDataURL lets one download the canvas'content as an image, with color values from 0 to 255.
To do the same from a webgl context, I guess a simple way is to use readPixels and copy the resulting buffer values…
Mouloud85
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HDR color-space transformations result in negative RGB values (Yxy to XYZ to sRGB)
I'm currently adding HDR to an old engine and stumbled on a color-space transformation problem.
I'm defining my lights in the Yxy color space
Then I'm converting Yxy to XYZ
XYZ to sRGB transformation.
Using RGB values > 1.0 when rendering and…
James Takarashy
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Open .hdr files with OpenCV
I try to read .hdr files like this:
img = cv2.imread(sys.argv[1])
cv2.imshow('Image', img)
This gives me a 3-channel 8-bit Mat which is either (nearly) completely white or a very dark picture. So I suppose it only gives me one image of the exposure…
R2-D2
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What is the webGl alternative method to implementing OpenGL's glDrawBuffers?
I am working on implementing a Bloom post processing effect via HDR. I am using a scaffold that is an online tutorial for doing the same effect but is based (the tutorial) on the latest version OpenGL. I am using WebGL 1.0 with OpenGl ES 2.0 for…
Khabs
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Any good registration algorithm for input image sequence(with different exposure) to HDR?
Had tried to get the global motion vector with matching binary maps by median intensity value, the performance is not good, any other ideas?
Yuan Chen
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OpenCV-Python createMergeDebevec returns an array of Inf
I am trying to get some HDR related functions working with OpenCV-Python: specifically I'm trying to reproduce the OpenCV C++ HDR tutorial. Unfortunately, the resulting hdr image/array comes out completely white (all values are Inf). Here is an…
Kent Shikama
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Exposure Fusion returns blue image with OpenCV on Android
I'm trying to implement Exposure Fusion with OpenCV 3.0.0 on Android using MergeMertens class.
The problem is that image is returned in blue. Here is the screenshot of how it looks like: http://take.ms/agYSD
I suppose the problem is with RGB/BGR…
Rodion Mamin
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Android camera api SCENE_MODE_HDR not supported in Nexus 5?
My Nexus 5 isn't supporting the HDR scene mode of the camera api (as well as the camera2 api). Is this due to the manufacturer support? If so, what I want to implement HDR scene mode in a custom camera app as in the stock camera?
I tried using both…
gopi1410
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imageIO to open .HDR file
I need to open an .hdr file and work on it, but imageIO doesn't supports that format.
The problem is that I need to keep the information loss as little as possible: 32bpc is perfect, 16 is fine and less the 16 won't work.
There are 3 possible…
pedro
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