System Information

OpenCV 4.x ( 4d26e16 )
Operating System / Platform: Ubuntu 24.04
Compiler & compiler version: GCC 13.2.0

Detailed description

If EXR decoder is enabled, following tests are failed.

readWrite_32FC1

When using OpenEXR 3.x, getFileSize() return 440u instead of 396u.
Note: At ubuntu 24.11, system default(apt) OpenEXR is 3.1.5. it returns 439u.

[ RUN      ] Imgcodecs_EXR.readWrite_32FC1
/home/kmtr/work/opencv4/modules/imgcodecs/test/test_exr.impl.hpp:38: Failure
Expected equality of these values:
  396u
    Which is: 396
  getFileSize(filenameOutput)
    Which is: 440

read_YC_changeDepth

There are small diffenct between (1) IMREAD_COLOR_RGB (2) IMREAD_COLOR_BGR with swapping.

[ RUN      ] Imgcodecs_EXR.read_YC_changeDepth
/home/kmtr/work/opencv4/modules/imgcodecs/test/test_exr.impl.hpp:202: Failure
Value of: cvtest::norm(img, img_rgb, NORM_INF) == 0
  Actual: false
Expected: true
[  FAILED  ] Imgcodecs_EXR.read_YC_changeDepth (12 ms)

Steps to reproduce

I used system OpenEXR 3.1.5 from apt server (not OpenCV bundled).

sudo apt upgrade
sudo apt install libopenexr-dev
export OPENCV_IO_ENABLE_OPENEXR=1
git clone https://github.com/opencv/opencv.git opencv4
cmake -S opencv4 -B build4-main
cmake --build build4-main
cd build4-main
./bin/opencv_test_imgcodecs --gtest_filter="*EXR*"

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)