Cannot get distortion parameter from ACameraMetadata

[nedfex]

SPECIFIC ISSUE ENCOUNTERED

I was modifying the sample code hello_ar_application.cc in sample/hello_ar_c, and trying to get intrinsic and distortion parameters, however the Tags did not contain such attributes, here is the code I added after backgroundrenderer.Draw(arsession, arframe) in the function void HelloArApplication::OnDrawFrame()

 int32_t count = 0;
    const uint32_t* tags = nullptr;
    ACameraMetadata_getAllTags(cameraMetadata, &count, &tags);
    LOGI("Metadata available %d tags: ", count);
    for (int tagIdx = 0; tagIdx < count; ++tagIdx) {
      LOGI("Found camera tag: %I", tags[tagIdx]);
      if (ACAMERA_LENS_DISTORTION == tags[tagIdx]) {
        LOGI("ACAMERA_LENS_RADIAL_DISTORTION available!!!!");
      }
    }
ACameraMetadata_const_entry entry = {0};
    camera_status_t cameraStatus = ACameraMetadata_getConstEntry(
        cameraMetadata, ACAMERA_LENS_DISTORTION, &entry);
    if (cameraStatus == ACAMERA_OK) {
      LOGI("Dist coeff: ");
      //            for (size_t i = 0; i < 6; i++)  {
      //                RORLOG_INFO << "coeff "  << i << ": " <<
      //                entry.data.f[i];
      //            }
    } 

Does anyone have idea how to get those values? Also, are images came out from ndk undistorted or not by default?

Thanks

VERSIONS USED

• Android Studio: 3.4.2
• ARCore SDK for Android: 28 (android 9)
• Device manufacturer, model, and O/S: pixel3, pixel3 XL
• ARCore: versionName=1.11.190715106 signatures=PackageSignatures{7df0262 version:3, signatures:[53bcc66f], past signatures:[]} Hidden system packages: versionName=0 signatures=PackageSignatures{8aee2ae version:0, signatures:[], past signatures:[]} packages packages packages packages
• Output of adb shell getprop ro.build.fingerprint: google/crosshatch/crosshatch:9/PQ1A.181205.006/5108886:user/release-keys

STEPS TO REPRODUCE THE ISSUE

WORKAROUNDS (IF ANY)

ADDITIONAL COMMENTS

[JaimeIvanCervantes]

I am also interested on this: when I acquire the came image, is the image undistorted already? If it's not undistorted, would it be possible to get the distortion coefficients?

[devbridie]

Currently no update on this, but this is duplicating #112. The image that comes out of ARCore is distorted.