opencv runtime_error ai_generated true

cv::error: sizes of input arrays must match in hconcat/vconcat

ID: opencv/hconcat-size-mismatch

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85%Fix Rate
88%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
4 active — — —

Root Cause

Image concatenation failed due to size/type mismatch.

generic

Workarounds

  1. 90% success Resize images to match dimensions: same height for hconcat, same width for vconcat
  2. 88% success Verify same type and channels: all CV_8UC3 or all CV_8UC1

Dead Ends

Common approaches that don't work:

  1. Force resize all to same size 72% fail

    Distorts aspect ratios

  2. Pad with zeros to max size 68% fail

    Visual artifacts at borders