C# PDF Reader SDK
C# PDF Reader: How to read, extract image from PDF file

//  open a document
String inputFilePath = Program.RootPath + "\\" + "3.pdf";
PDFDocument doc = new PDFDocument(inputFilePath);

//  extract all images in the document
List<PDFImage> allImages = PDFImageHandler.ExtractImages(doc);

//  show information of these images
foreach (PDFImage image in allImages)
{
    Console.WriteLine("Image: page index = " + image.PageIndex);
    Console.WriteLine("     : X = " + image.Position.X + ", Y = " + image.Position.Y);
    Console.WriteLine("     : X = " + image.GetBoundary().X + ", Y = " + image.GetBoundary().Y);
    Console.WriteLine("     : Width = " + image.GetBoundary().Width);
    Console.WriteLine("     : Height = " + image.GetBoundary().Height);
}

//  extract all images in the first page
int pageIndex = 0;
PDFPage page = (PDFPage)doc.GetPage(pageIndex);
List<PDFImage> allImagesInPage = PDFImageHandler.ExtractImages(page);

//  show information of these images
foreach (PDFImage image in allImagesInPage)
{
    Console.WriteLine("Image: page index = " + image.PageIndex);
    Console.WriteLine("     : X = " + image.Position.X + ", Y = " + image.Position.Y);
    Console.WriteLine("     : X = " + image.GetBoundary().X + ", Y = " + image.GetBoundary().Y);
    Console.WriteLine("     : Width = " + image.GetBoundary().Width);
    Console.WriteLine("     : Height = " + image.GetBoundary().Height);
}

//  open a document
String inputFilePath = Program.RootPath + "\\" + "3.pdf";
PDFDocument doc = new PDFDocument(inputFilePath);

//  get the first page
int pageIndex = 0;
PDFPage page = (PDFPage)doc.GetPage(pageIndex);

//  select image at the position (100F, 100F) in the page
PointF cursorPos = new PointF(100F, 100F);
PDFImage image = PDFImageHandler.SelectImage(page, cursorPos);
if (image == null)
{
    Console.WriteLine("No image has been found!");
}
else
{
    Console.WriteLine("Image: boundary = " + image.GetBoundary().ToString());
}

//  open a document
String inputFilePath = Program.RootPath + "\\" + "3.pdf";
PDFDocument doc = new PDFDocument(inputFilePath);

//  get the first page
int pageIndex = 0;
PDFPage page = (PDFPage)doc.GetPage(pageIndex);

//  define the region (Rectangle [50F, 50F, 300F, 400F]) of the page
RectangleF region = new RectangleF(50F, 50F, 300F, 400F);

//  get all images in the region in sequence (from bottom to top)
List<PDFImage> images = PDFImageHandler.SelectImages(page, region);

//  select the top image in the region
PDFImage image1 = PDFImageHandler.SelectImage(page, region);

//  select the bottom image in the region
int sequenceIndex = 0;
PDFImage image2 = PDFImageHandler.SelectImage(page, region, sequenceIndex);