How to display document analysis results in FineReader Engine 12

Question

Is it possible to print the detected blocks after the analysis step?

Answer

The following code will display the document analysis results graphically:

private void DrawBlocks(FREngine.Layout layout, string imagePath)
{
//create a Graphics object
Bitmap InitialImage = new Bitmap(imagePath);
Bitmap EditableImage = new Bitmap(InitialImage);
Graphics gr = Graphics.FromImage(EditableImage);

//draw each block
for (int i = 0; i < layout.Blocks.Count; i++)
{
//set pen color depending on block type;
int type = (int)layout.Blocks.Item(i).Type;

Color clr;
switch (type)
{
case 0:
clr = Color.Green; //text
break;
case 1:
clr = Color.Red; //raster picture
break;
case 2:
clr = Color.Purple; //table
break;
case 3:
clr = Color.LawnGreen; //barcode
break;
default:
clr = Color.Pink; //others
break;
}

Pen pen = new Pen(clr, 10);

//draw each region of the current block using selected color
for (int j = 0; j < layout.Blocks.Item(i).Region.Count; j++)
{
int left = layout.Blocks.Item(i).Region.get_Left(j);
int top = layout.Blocks.Item(i).Region.get_Top(j);
int right = layout.Blocks.Item(i).Region.get_Right(j);
int bottom = layout.Blocks.Item(i).Region.get_Bottom(j);

int width = right - left;
int height = bottom - top;

gr.DrawRectangle(pen, left, top, width, height);
}
}
//save modified image
EditableImage.Save(System.IO.Path.ChangeExtension(imagePath, ".gif"), System.Drawing.Imaging.ImageFormat.Gif);
}

private void processImage()
{
string imagePath = @"D:\Demo.tif";
FREngine.FRDocument document = engineLoader.Engine.CreateFRDocumentFromImage(imagePath);
document.Analyze(null);
DrawBlocks(document.Pages[0].Layout, imagePath);

document.Close();
}

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