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Convert iTextSharp.text.pdf.BarcodeQRCode to System.Drawing.Image

Looking for a way to convert iTextSharp.text.pdf.BarcodeQRCode to System.Drawing.Image
This is what I have so far...
public System.Drawing.Image GetQRCode(string content)
{
iTextSharp.text.pdf.BarcodeQRCode qrcode = new iTextSharp.text.pdf.BarcodeQRCode(content, 115, 115, null);
iTextSharp.text.Image img = qrcode.GetImage();
MemoryStream ms = new MemoryStream(img.OriginalData);
return System.Drawing.Image.FromStream(ms);
}
In line 3 above using img.OriginalData returns null
Using img.RawData on line 3 instead thows invalid parameter error on line 4.

I've googled some of the code samples on how to perform the thing you want and your code (the "OriginalData" approach) is basicaly the same: https://csharp.hotexamples.com/examples/iTextSharp.text.pdf/BarcodeQRCode/-/php-barcodeqrcode-class-examples.html .
However, I don't see how it could work. From my investigations of BarcodeQRCode#getImage it seems that OriginalData is not set while processing such a barcode, so it will always be null.
More than that, the code you mention belongs to iText 5, which is end of life and no longer maintained (with an exception of considerable security fixes), so it's recommended to update to iText 7.
As for iText 7, I do see how to achieve the same in Java, since barcode classes do have a createAwtImage method there. .NET, on the other hand, lacks such a functionality, so I'd day that one unfortunately couldn't do it in .NET.
There are some good reasons for that. iText's Images (and a barcode could be easily converted to an iText's Image object as shown here: https://kb.itextpdf.com/home/it7kb/faq/how-to-generate-2d-barcode-as-vector-image) represent a PDF's XObject. In PDF syntax, an image file (jpg, png, etc.) is an XObject with the raw image data stored inside. However, an XObject can also contain PDF syntaxt content (it is not just used for image files). So to render such a content one needs to process the data from PDF syntax to image syntax, which is not that easy. There are some means in Java's awt to do so, that's why it's implemented in Java. As for .NET, since there is no out-of-the-box means to convert PDF images to System.Drawing.Image, it was decided not to implement it.
To conclude, there is another iText product, pdfRender, which allows one to convert PDF files (and you could create a page just for a barcode) to images. Perhaps you might want to play with it: https://itextpdf.com/en/products/itext-7/convert-pdf-to-image-pdfrender

magickimage.net (C#) image saturation when converting format?

I tried to use magickimage.net (C#) to convert HEIC image files (from iPhone 7) to JPG format.
Using all the default values (see below), though it converts successfully -- however, when comparing the converted image, vs, if I copy the files from iPhone directly to my computer as JPG, I noticed the images converted from magickimage look more "pale", lacking vivid color (saturation, I would say).
Just wondering if anyone happens to know the right settings to improve that?
using (MagickImage image = new MagickImage(files[i]))
{
image.Format = MagickFormat.Jpeg;
image.Write(MyFile.ReplaceFileExtension(files[i], "jpg"));
}

Just a guess, most likely not apply the correct color profile.
Check the image if it has Color properties ie. Table VII. Image Properties and Figure 1 in the Technical spec for HEIF is at:
https://nokiatech.github.io/heif/technical.html
Also I would check if the following display the image correctly.
https://github.com/liuziangexit/HEIF-Utility/tree/master/HEIF%20Utility%20English

How to remove metadata from jpg and png images

This should be a pretty trivial programming task in C#, however after I have searched a while I simply cannot find anything relevant on how to remove metadata.
I want to remove jpg and png image metadata such as: folder path, shared with, owner and computer.
My application is an MVC 4 application. In my website users can upload an image I get this image at this ActionResult method
if (image != null)
{
photo.ImageFileName = image.FileName;
photo.ImageMimeType = image.ContentType;
photo.PhotoFile = new byte[image.ContentLength];
image.InputStream.Read(photo.PhotoFile, 0, image.ContentLength);
}
Photo is a property in the model, goes like this.
public byte[] PhotoFile { get; set; }
I imagine the way to remove above mentioned metadata or just all metadata, would be to use some coding like this
if (image != null)
{
image = image.RemoveAllMetaData; !!!
I dont mind using some 3rd party dll as long as it is compatible with NET 4.
Thanks.

'Metadata' here is a bit ambiguous--Do you mean the data which is required for a viewer to properly determine the image format so it can be displayed, saving only the raw image data? Or, more likely, do you mean the extra information, such as author, camera type, GPS location, etc, that is often added via the EXIF tags?
If you mean something like the EXIF data, there's a lot of programming material already on the web about how to add/modify/remove EXIF tags, and even some apps which already strips such tags: http://www.steelbytes.com/?mid=30 for example.
If you mean you just want the raw image data, you'll probably have to read and process the image first, since both JPEG and PNG do not contain simply the raw image data; It's encoded with various methods--which is why they contain metadata to tell you how to decode it in the first place. You'll have to learn/explore the JPEG and PNG data formats to extract the original raw image data (or a reasonable facsimile in the case of a "lossy" encoding).
All the above is well-documented on various websites which can be found on Google, and many include image manipulation libraries which can handle these chores for you. I suspect you just didn't know to search for something like "JPEG PNG EXIF METADATA".
BTW, EXIF applies to JPEG's, where EXIF is, loosely (and not fully technically correct) an addition of data (extension) to the end of the JPEG file, which can usually simply be truncated to remove. A quick Google search for me turned up something like libexif.sourceforge.net and other similar results.
I'm not entirely certain about the PNG format, but I believe the PNG format (which does call such items "metadata" as well) was written to include such data as part of the file format rather than an "extension" tagged on after the fact like EXIF is. PNG, however, is open source, and you can obtain libraries and code for manipulating them from the PNG website (www.libpng.org).

There's an app for that but it's written in Perl. It doesn't recompress the image and it's here http://www.sno.phy.queensu.ca/~phil/exiftool
Found it in this thread
How to remove EXIF data without recompressing the JPEG?

Do what all the social media websites do. Create a new image file, stream in the image byte data and use the file you created than the original one that was uploaded. Of course, now you will need to find out the original image's color depth and so on so that the image you create is not of a lower quality -- unless you need to do a disk or image resize as well.

Convert image from one format to another

I need to convert image from one format, some big format, to some lite format like jpg or any other.
I am using winforms, C#. What class is best for this job, and any suggestion what is a good way to do this?
I find Imagemagic. I guess it's the right way to do this.

What format are you converting from? If it's bitmaps and you don't need fine-grained control over the image, just use the built in conversions:
using (Image img = Image.FromFile(#"c:\pic.bmp")) {
img.Save(#"c:\pic.jpg" ,ImageFormat.Jpeg);
}

passing the right BytesArray into the MemoryStream for Image

there a way to determine that I am passing the right byte array to the MemoryStream if I want to create an Image out of byte array.
MemoryStream mStream = new MemoryStream();
mStream.Write(byteArray, 0, byteArray.Lenth);
Image imgObj = Image.FromStream(mStream);
How can I, if possible Correct the byteArray that it is a valid byteArray for an Image?

This is a really ominous question, surely you must know where you are reading your data from? When you create an image using Image.FromStream, an ArgumentException will be thrown if it cannot recognise the format. Why don't you use that mechanism for identifying an incorrect stream of data, rather than re-invent the wheel?

I've done a bit of programatic image manipulation myself. The thing you'll want to do is find the spec for the image format that you are modifying and make sure you do everythign you should. For example png files are chunked and have checksums on each section so if you change something in that chunk you have to recalculate the checksum at the end of the section.

After reading your questions and your comments, i think what you're trying is to manipulate the image by manipulating the byte array before you put it into the Image class. And now you claim that your byte array is corrupt for this image format and how you can correct it.
So the answer to this question would be: You corrupted it, you'll fix it.
But to really solve your problem, if your goal is to manipulate the picture itself, just load it into an interims Image and use the Graphics class to manipulate your picture. Afterwards put the result into the real image object you like. Ready, without any hassle about working on the byte array.

here's the answer Image Processing for Dummies with C# and GDI+
OT: i don't know how to put links on comments so I put it in the answers.