System Information

The latest version OpenCVversion was used

devices:

• Huawei P20 Pro, EMUI 12.0.0, (Android 10?)
• Xiaomi Mi 8, Android 10, MIUI 12.0.3

Detailed description

Theproblem may be related toandroid/ndk#289

Problem in findCirclesGrid() call, this func throw error:

2023-11-28 20:06:07.539  9151-9233  cv::error()             org...ncv.samples.cameracalibration  E  OpenCV(4.8.0-dev) Error: No Error (samples is empty) in filterOutliersByDensity, file ../../modules/calib3d/src/circlesgrid.cpp, line 10982023-11-28 20:06:07.541  9151-9233  libc                    org...ncv.samples.cameracalibration  A  Fatal signal 11 (SIGSEGV), code 2

Problem in this code:

if (samples.empty())    CV_Error( 0, "samples is empty" );

ThisCV_Error( 0, "samples is empty" ); is located intry/catch block, but in this Android sample and my device this causes crash anyway.

The error is not reproduced on all devices.

error_logs.txt

Steps to reproduce

Build with build_sdk.py

export ANDROID_NDK_HOME=/Android/Sdk/ndk/18.1.5063045/export ANDROID_SDK=/Android/Sdk/python /opencv/platforms/android/build_sdk.py /opencv/build/ /home/alexander/all/opencv/opencv --ndk_path /Android/Sdk/ndk/18.1.5063045/ --sdk_path /Android/Sdk/ --config /opencv/platforms/android/ndk-18-api-level-21.config.py

run camera-calibration sample

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)