System.OutOfMemoryException occurred in System.Drawing.dll with big quantity of picture

Question

I have a folder with height quantity of geolocated file, I want to make a KML with the placemark. No problem for the XML(KML) document, but the image are big and i want create a thumb(1/10) and small image (1/4) in separated folder.
The image are 4000x3000 allround 5mb, for little quantity not have problem but when the folder containg more of 35 image (in debug) i have the problem. I have try with disposable object used with Using, GC.collect to only image elaboration, but nothing.

I have folder to elaborate with 1400 image or more...is possible make to work this application with it?

public static class MyClass_img
{
    public static void ResizeImage(Image image, int width, int height, string pathImage)
    {
        using (var destImage = new Bitmap(width, height))
        {
            destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);

            using (var graphics = Graphics.FromImage(destImage))
            {
                graphics.CompositingMode = CompositingMode.SourceCopy;
                graphics.CompositingQuality = CompositingQuality.HighQuality;
                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.SmoothingMode = SmoothingMode.HighQuality;
                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;

                using (var wrapMode = new ImageAttributes())
                {
                    wrapMode.SetWrapMode(WrapMode.TileFlipXY);

                    var destRect = new Rectangle(0, 0, width, height);
                    graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
                }
            }

            destImage.Save(pathImage);
        }
        GC.Collect();
    }

    public static string imageReduce(Image img, string path, int percentValue, string extension, string folder)
    {
        var dirName = new DirectoryInfo(path).Parent.Name;
        string pathImg = folder + dirName + "_" + Path.GetFileNameWithoutExtension(path) + extension;
        AprItalia_img.ResizeImage(img, img.Width / percentValue, img.Height / percentValue, pathImg);
        return pathImg;
    }

}

You're probably not disposing the image you pass into `imageReduce(Image img, ...)`. — CodeCaster, Jun 24 '17 at 14:18
Don't do `GC.Collect()` unless really required since frequent cleanup increases processing pressure. — Siva Gopal, Jun 24 '17 at 14:21
i have 16gb, but i hav read this ... is possible have excepption beacose use all of 1.2gb, ok is possible update to 4gb, but why it have all in memory? i think is necessary only the XML file, the image are saved in the folder and the object are dispose https://stackoverflow.com/questions/14186256/net-out-of-memory-exception-used-1-3gb-but-have-16gb-installed — Antonio Feliziani, Jun 24 '17 at 14:59
I have set build to 64bit ...use all memory, for the moment have elaborate allround 500 file ...use all the ram of the system, but i not undestand why use all the ram...i dispose the image object and the other is only xml file — Antonio Feliziani, Jun 24 '17 at 15:20

score 0 · Answer 1 · answered Jun 25 '17 at 02:32

You do not have to call GC.Collect().

As per MSDN,

Always call Dispose before you release your last reference >to the Image. Otherwise, the resources it is using will not >be freed until the garbage collector calls the Image >object's Finalize method

So in your case,it seems to be going for finalize.Also are you also releasing the Image object by calling it's dispose?

System.OutOfMemoryException occurred in System.Drawing.dll with big quantity of picture

1 Answers1