I have to load .tiff file
I did with both Image.FromFile() and Bitmap.FromFile()
But they are throwing OutOfMemoryException
Any solution for how to load this?
I assume that the TIFF file you are trying to load uses a compression that is not compatible with .Net. Namely the JPEG compression is not supported by .Net.
I suggest you try LibTiff.Net (though I cannot tell for sure if it will work):
I use ImageGlue. It can convert a lot more then just tiff.
There is a project on codeproject: "How to Load/Display images with C#".
Take a look at it
There is a possibility that this issue occurred due to multiple image tiff file. In this case, you have to extract individual image files from the source tiff file and then view those frame by frame. Here is a sample code.
http://www.c-sharpcorner.com/Blogs/10924/how-to-save-split-merge-and-view-multipage-tiff-image.aspx
Related
I'm trying to show TIFF files on a picturebox in C#. My code is here:
pictureBox1.Image = Image.FromFile("someName.tif");
This code is working fine, but some TIFF file isn't displaying on the picturebox (the TIFF file isn't broken). What is wrong?
This TIFF file contains one color image compressed using JPEG 4:4:4.
Although Microsoft functions can handle some sub-types of TIFF, including some JPEG compressed varieties, this particular file uses a flavor of JPEG compression known as "old style". It appears Microsoft functions do not support this flavor.
If you need to load such files in your code, you might have to use a dedicated imaging library.
I need to update EXIF info in a lot of .png files (tens of thousands of hires pictures) and I wonder if there is some (not too complicated and documented) way that I can do that without opening (decompressing the whole image) and then re-save it (compressing it again)?
Unfortunately the .Net GDI+ image format support is very patchy.
Consider ImageMagick. There is a .Net wrapper for it.
http://www.imagemagick.org/script/index.php
Also consider ExifTool:
http://owl.phy.queensu.ca/~phil/exiftool/
I searched on how to check if a TIFF file is corrupt or not. Most suggests wrapping the Image.FromFile function in a try block. If it throws an OutOfMemoryException, its corrupt. Has anyone used this? Is it effective? Any alternatives?
Please check out the freeware called LibTiff .NET. It has the function to check if every page in a TIF file is corrupted or not. Even partially corrupt also no problem
http://bitmiracle.com/libtiff/
Thanks
Many tiff files won't open in the standard GDI+ .NET. That is, if you're running on Windows XP. Window 7 is much better. So any file which is not supported by GDI+ (i.e. fax, 16 bit gray scale, 48bpp RGB, tiled tiff, piramidical tiled tiff etc.) are then seen as 'corrupt'. And not just that, anything resulting in a bitmap over a few 100 MByte on a 32-bit system will also cause an out-of-memory exception.
If your goal is to support as much as possible of the TIFF standard, please start from LibTiff (derivates). I've used LibTiff.NET from BitMiracle (LGPL), which worked well for me. Please see my other posts
Many of the TIFF utilities are also based on LibTIFF, some of them are ported to C#.NET. This would be my suggestion if you want to validate the TIFF.
As for the TIFF specification suggested in other replies: of course this gives you bit-level control. But to my experience you won't need to go that low to have good TIFF support. The format is so versatile that it will cost you an enormous amount of time to start support from scratch.
It will only be corrupt in the sense that the frameworks methods cant open it.
There are some TIFF types that the framework cannot open -( In my case I cant remember the exact one, think it was one of the FAX type ones...)
That may be enough for you, if you are just looking a using the framework to manipulate images. After all I you cant open it, you cant use it...
ImageMagic - may give you more scope here
Without looking at the tiff, it may be difficult to see if its corrupt from a visual perspective, but if you have issues with processing an image, just create a function that does a basic test for this type of processing and handle the error?
How do I display tiff files on a Silverlight application? I can display any image format except tiff, can anyone help me? Thanks.
I was successful displaying TIFFs in Silverlight. It's easy to port the free LibTiff.NET library to Silverlight, just 3-4 minor tweaks required.
The library itself is quite legacy-like and raw to use and one still needs to have some knowledge about the inner workings of the TIFF format in order to be able to extract the image data the way one needs it.
But it's doable and the bits and pieces can then be chiseled into a WriteableBitmap.
Why don't you try TiffLight? It is a Silverlight control that allows native display of Tiff files in Silverlight.
A Tiff file is a multi-page format so rendering it is not as simple as a png, gif or bmp.
You have of course already found this via a web search but it'll cost you.
Silverlight 2.0 doesn't support tiff images according to this.
However, in the article I believe it explains a way to convert the tiff image to a jpeg or a png (which is supported by Silverlight). However, you'll have to do this processing on the server-side.
I would use an HttpHandler that converts the Tiff using the TiffBitmapDecoder and PngBitmapEncoder classes.
Alternatively, if you can decode the Tiff images in Silverlight, you can display them using a WriteableBitmap.
I have a raw pixel data in a byte[] from a DICOM image.
Now I would like to convert this byte[] to an Image object.
I tried:
Image img = Image.FromStream(new MemoryStream(byteArray));
but this is not working for me. What else should I be using ?
One thing to be aware of is that a dicom "image" is not necessarily just image data. The dicom file format contains much more than raw image data. This may be where you're getting hung up. Consider checking out the dicom file standard which you should be able to find linked on the wikipedia article for dicom. This should help you figure out how to parse out the information you're actually interested in.
You have to do the following
Identify the PIXEL DATA tag from the file. You may use FileStream to read byte by byte.
Read the pixel data
Convert it to RGB
Create a BitMap object from the RGB
Use Graphics class to draw the BitMap on a panel.
The pixel data usually (if not always) ends up at the end of the DICOM data. If you can figure out width, height, stride and color depth, it should be doable to skip to the (7FE0,0010) data element value and just grab the succeeding bytes. This is the trick that most normal image viewers use when they show DICOM images.
There is a C# library called EvilDicom (http://rexcardan.com/evildicom/) that can be used to pull the image out of a DICOM file. It has a tutorial on how to do it on the website.
You should use GDCM.
Grassroots DiCoM is a C++ library for DICOM medical files. It is automatically wrapped to python/C#/Java (using swig). It supports RAW, JPEG 8/12/16bits (lossy/lossless), JPEG 2000, JPEG-LS, RLE and deflated (zlib).
It is portable and is known to run on most system (Win32, linux, MacOSX).
http://gdcm.sourceforge.net/wiki/index.php/GDCM_Release_2.4
See for example:
http://gdcm.sourceforge.net/html/DecompressImage_8cs-example.html
Are you working with a pure standard DICOM File? I've been maintainning a DICOM parser for over a two years and I came across some realy strange DICOM files that didn't completely fulfill the standard (companies implementing their "own" twisted standard DICOM files) . flush you byte array into a file and test whether your image viewer(irfanview, picassa or whatever) can show it. If your code is working with a normal JPEG stream then from my experience , 99.9999% chance that this simply because the file voilate the standard in some strange way ( and believe me , medical companies does that a lot)
Also note that DICOM standard support several variants of the JPEG standard . could be that the Bitmap class doesn't support the data you get from the DICOM file. Can you please write down the transfer syntax?
You are welcome to send me the file (if it's not big) yossi1981#gmail.com , I can check it out , There was a time I've been hex-editing DICOM file for a half a year.
DICOM is a ridiculous specification and I sincerely hope it gets overhauled in the near future. That said Offis has a software suite "DCMTK" which is fairly good at converting dicoms with the various popular encodings. Just trying to skip ahead in the file x-bytes will probably be fine for a single file but if you have a volume or several volumes a more robust strategy is in order. I used DCMTK's conversion code and just grabbed the image bits before they went into a pnm. The file you'll be looking for in DCMTK is dcm2pnm or possibly dcmj2pnm depending on the encoding scheme.
I had a problem with the scale window that I fixed with one of the runtime flags. DCMTK is open source and comes with fairly simple build instructions.