c# foreach image in folder

Question

Below is some code that

creates a directory
uses MagickNet to covert a PDF into separate BMP images and stores it in a folder (ImagePath)
Then it uses TessNet2 to scan each image in that folder to parse out information

I can't seem to get the foreach loop that scans the ImagePath folder. Any help?

The error right now is on the 'foreach' statement and it says "Cannot convert type 'char' to 'System.Drawing.Image'"

static void Main(string[] args)
    {
        string ImagePath = exePath + "\\Images"; 
        if (!Directory.Exists(ImagePath))
        {
            Directory.CreateDirectory(ImagePath);
        }

        MagickReadSettings settings = new MagickReadSettings();
        settings.Density = new MagickGeometry(300, 300);

        using (MagickImageCollection images = new MagickImageCollection())
        {
            images.Read(@"D:\Test\ABStest.pdf",settings);
            int page = 1;
            foreach (MagickImage image in images)
            {
                image.Write(ImagePath + "\\ABS" + page + ".bmp");
                page++;
            }
        }



        foreach (Image item in ImagePath)
        {
            using (Bitmap bmp = new Bitmap(item))
            {
                tessnet2.Tesseract tessocr = new tessnet2.Tesseract();
                tessocr.Init(@"C:\Users\Matt Taylor\Documents\Visual Studio 2012\Projects\TessNet2\TessNet2\bin\Debug\tessdata", "eng", false);
                tessocr.GetThresholdedImage(bmp, Rectangle.Empty).Save("c:\\temp\\" + Guid.NewGuid().ToString() + ".bmp");
                // Tessdata directory must be in the directory than this exe
                Console.WriteLine("Multithread version");
                ocr.DoOCRMultiThred(bmp, "eng");
                //Console.WriteLine("Normal version");
                //ocr.DoOCRNormal(bmp, "eng");
            }
        }
    }

score 4 · Answer 1 · answered Jul 10 '13 at 22:33

4

You can use Directory.GetFiles to return all the filenames in the directory and create your Bitmaps from there

foreach (string imageFileName in Directory.GetFiles(ImagePath))
{
    using (Bitmap bmp = new Bitmap(imageFileName))
    {
    }
}

But if there are other files in that folder you should add a filter

foreach (string imageFileName in Directory.GetFiles(ImagePath, "*.jpg"))
{
    using (Bitmap bmp = new Bitmap(imageFileName))
    {
    }
}

answered Jul 10 '13 at 22:33

sa_ddam213

42,848
7
101
110

I missed that MaylorTaylor wanted a Bitmap after loading the Image. The filter is a good thought too. – TheEvilPenguin Jul 10 '13 at 22:39
Said this about 2 hours ago :) [here](http://stackoverflow.com/a/17930913/1324033) – Sayse Jul 29 '13 at 20:17

score 2 · Accepted Answer · answered Jul 11 '13 at 16:49

2

You don't need to save the file to disk. You could use the .ToBitmap() method of MagickImage.

foreach (MagickImage image in images)
{
  using (Bitmap bmp = image.ToBitmap())
  {
    tessnet2.Tesseract tessocr = new tessnet2.Tesseract();
    // etc...
  }
}

answered Jul 11 '13 at 16:49

dlemstra

7,813
2
27
43

I had no clue about that method. Works perfectly and makes it so I don't have to waste space creating images. Thanks! – MaylorTaylor Jul 11 '13 at 17:02

score 1 · Answer 3 · answered Jul 10 '13 at 22:33

You are looping through String ImagePath, which gives you a collection of characters. You need to search through the directory with Directory.GetFiles(), and load the images with Image.FromFile():

foreach (String itemPath in Directory.GetFiles(ImagePath))
{
    using (Image item = Image.FromFile(itemPath))
    {
        ...
    }
}

c# foreach image in folder

3 Answers3