Fix: Handle grayscale image matching with RGB templates matching#5700
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ycnliu wants to merge 4 commits into
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Fix: Handle grayscale image matching with RGB templates matching#5700ycnliu wants to merge 4 commits into
ycnliu wants to merge 4 commits into
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Add: Event Alliance Before the Hagiobull (event_20260520_cn)
Fixed OpenCV matchTemplate assertion error when matching RGB template frames against grayscale images. The error occurred in campaign OCR when TEMPLATE_STAGE_CLEAR_20240725 (GIF with RGB frames) was matched against grayscale stage images. Changes: - Added automatic grayscale conversion of templates when input image is grayscale in Template.match_multi() - Handles both GIF and non-GIF templates - Prevents cv2.error: (-215:Assertion failed) type mismatch
Owner
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Convert TEMPLATE_STAGE_CLEAR_20240725 to grayscale image instead. Converting channels internally may have bad performance and hard to notice |
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Fixes the OpenCV matchTemplate assertion error when matching RGB template frames against grayscale images.
Issue
Campaign OCR fails with error:
cv2.error: (-215:Assertion failed) (depth == CV_8U || depth == CV_32F) && type == _templ.type() && _img.dims() <= 2
This occurs when
TEMPLATE_STAGE_CLEAR_20240725(GIF with RGB frames) is matched against grayscale stage images incampaign_extract_name_image().Changes
Template.match_multi()Testing
The fix ensures that when a grayscale image is passed to
match_multi(), any RGB templates are automatically converted to grayscalebefore matching.