static ImageTableCollection DetectTables(CellBoxes cellBoxes, int pageWidth, int pageHeight, int lineDistance, int textSize)
{
ImageTableCollection tables = new ImageTableCollection();
CrossPoints crossPoints;
ImageCellCollection cells;
int[,] crossPointIndexes;
int index = 0, minX, minY, maxX, maxY;
int spacingMin = (int)(textSize * RATIO_TEXT_HEIGHT);
double widthRatio = 1d / pageWidth;
double heightRatio = 1d / pageHeight;
foreach (CellBox box in cellBoxes)
{
// box 안의 line이 5개가 넘어야 table로 인정한다. top, bottom, left, right가 있으므로 나머지 line이 적어도 1개 이상 있어야 함.
if (box.Horizontals.Count + box.Verticals.Count > 0)
{
// 교차점을 구한다.
crossPoints = DetectRawCrossPoints(horizontals: box.Horizontals, verticals: box.Verticals, lineDistance: lineDistance, crossPointIndexes: out crossPointIndexes);
// 일단 cell을 구한다.
cells = DetectRawCells(crossPoints: crossPoints, crossPointIndexes: crossPointIndexes, spacingMin: spacingMin, widthRatio: widthRatio, heightRatio: heightRatio);
if (cells.Count > 0)
{
minX = minY = int.MaxValue;
maxX = maxY = int.MinValue;
foreach (ImageCell cell in cells)
{
if (cell.LeftX < minX)
{
minX = cell.LeftX;
}
if (cell.RightX > maxX)
{
maxX = cell.RightX;
}
if (cell.TopY < minY)
{
minY = cell.TopY;
}
if (cell.BottomY > maxY)
{
maxY = cell.BottomY;
}
}
tables.Add(new ImageTable(index: index++, x: minX, y: minY, width: maxX - minX, height: maxY - minY, cells: cells));
}
}
}
return(tables);
}
static void DrawTables(ImageTableCollection tables, string imagePath)
{
using (Mat img = Cv2.ImRead(fileName: imagePath, flags: ImreadModes.Color))
{
foreach (ImageTable table in tables)
{
foreach (ImageCell cell in table.cells)
{
Cv2.Rectangle(img: img, rect: new Rect(x: cell.LeftX, y: cell.TopY, width: cell.RightX - cell.LeftX, height: cell.BottomY - cell.TopY), color: new Scalar(0, 0, 255), thickness: 2);
}
Cv2.Rectangle(img: img, rect: new Rect(x: table.X, y: table.Y, width: table.Width, height: table.Height), color: new Scalar(0, 0, 255), thickness: 2);
}
Cv2.ImWrite($"{imagePath}_Tables.png", img);
}
}
public static ImageTableCollection GetTables(string imagePath, int textSize, bool drawTable = false, bool drawLine = false)
{
CellLines horizontals, verticals;
int pageWidth, pageHeight;
DetectLines(imagePath: imagePath, textSize: textSize, horizontals: out horizontals, verticals: out verticals, pageWidth: out pageWidth, pageHeight: out pageHeight);
int lineDistance = GetLineDistanceByModeThickness(horizontals: ref horizontals, verticals: ref verticals);
CellBoxes cellBoxes = DetectCellBoxes(lineDistance: lineDistance, horizontals: ref horizontals, verticals: ref verticals);
ImageTableCollection tables = DetectTables(cellBoxes: cellBoxes, pageWidth: pageWidth, pageHeight: pageHeight, lineDistance: lineDistance, textSize: textSize);
if (drawLine)
{
DrawLines(horizontals: horizontals, verticals: verticals, imagePath: imagePath);
}
if (drawTable)
{
DrawTables(tables: tables, imagePath: imagePath);
}
return(tables);
}