为什么要根据y和x坐标做两次排序？

[1000374]

为什么要根据y和x坐标做两次排序？

[n0099]

PaddleSharp/src/Sdcb.PaddleOCR/PaddleOcrDetector.cs

Lines 144 to 159 in 99b97ec

	RotatedRect[] rects = contours
	.Where(x => BoxScoreThreahold == null || GetScore(x, pred) > BoxScoreThreahold)
	.Select(x => Cv2.MinAreaRect(x))
	.Where(x => x.Size.Width > MinSize && x.Size.Height > MinSize)
	.Select(rect =>
	{
	float minEdge = Math.Min(rect.Size.Width, rect.Size.Height);
	Size2f newSize = new(
	(rect.Size.Width + UnclipRatio * minEdge) * scaleRate,
	(rect.Size.Height + UnclipRatio * minEdge) * scaleRate);
	RotatedRect largerRect = new(rect.Center * scaleRate, newSize, rect.Angle);
	return largerRect;
	})
	.OrderBy(v => v.Center.Y)
	.ThenBy(v => v.Center.X)
	.ToArray();

PaddleSharp/src/Sdcb.PaddleOCR/PaddleOcrResult.cs

Lines 25 to 34 in 99b97ec

	/// <summary>
	/// Concatenates the text from each <see cref="PaddleOcrResultRegion"/> object in <see cref="Regions"/>
	/// and returns the resulting string, ordered by the region's center positions.
	/// </summary>
	/// <value>A string containing the concatenated text from each <see cref="PaddleOcrResultRegion"/> object
	/// in <see cref="Regions"/>, ordered by the region's center positions.</value>
	public string Text => string.Join("\n", Regions
	.OrderBy(x => x.Rect.Center.Y)
	.ThenBy(x => x.Rect.Center.X)
	.Select(x => x.Text));

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