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43 lines
1.3 KiB
43 lines
1.3 KiB
%helperSanitizeBoxes Sanitize box data.
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% This example helper is used to clean up invalid bounding box data. Boxes
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% with values <= 0 are removed and fractional values are rounded to
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% integers.
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%
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% If none of the boxes are valid, this function passes the data through to
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% enable downstream processing to issue proper errors.
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% Copyright 2020 The Mathworks, Inc.
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function boxes = helperSanitizeBoxes(boxes, imageSize)
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persistent hasInvalidBoxes
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valid = all(boxes > 0, 2);
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if any(valid)
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if ~all(valid) && isempty(hasInvalidBoxes)
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% Issue one-time warning about removing invalid boxes.
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hasInvalidBoxes = true;
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warning('Removing ground truth bouding box data with values <= 0.')
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end
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boxes = boxes(valid,:);
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boxes = roundFractionalBoxes(boxes, imageSize);
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end
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end
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function boxes = roundFractionalBoxes(boxes, imageSize)
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% If fractional data is present, issue one-time warning and round data and
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% clip to image size.
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persistent hasIssuedWarning
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allPixelCoordinates = isequal(floor(boxes), boxes);
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if ~allPixelCoordinates
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if isempty(hasIssuedWarning)
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hasIssuedWarning = true;
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warning('Rounding ground truth bounding box data to integer values.')
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end
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boxes = round(boxes);
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boxes(:,1:2) = max(boxes(:,1:2), 1);
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boxes(:,3:4) = min(boxes(:,3:4), imageSize([2 1]));
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end
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end |