I have been trying to create a decoder that will stream through a pcx file and display it on screen as a bitmap. I have managed to get the information from the image header by using a binary reader, but I have now reached the part that seems to take the least amount of code, yet is also the hardest: creating an array of pixels.
I understand that i may need to add two embeddded for loops to process the data. I have looked at some C and C++ examples, but struggle to understand them. I also need to get the array to display it. if you need more code then I will share it.
I have searched far and wide and read the spec, but I don't know how to approach this. If anyone could help me, I would be very grateful.
Regards.
The .NET does not support PCX images natively, you have two choices. Read the specification and decode the image by yourself or use some library.
As suggested on bytes.com you can use Dot Net Fireball (a Free Image wrapper) and load the image like this:
Fireball.Drawing.FreeImage freeImage = new FreeImage(#"c:\test.pcx");
Image image = freeImage.GetBitmap();
http://magick.codeplex.com/
a nice wrapper working with http://imagemagick.codeplex.com/
easy to setup and get going, see samples at the bottom of the page here:
http://magick.codeplex.com/documentation
Related
I am currently using the evil-dicom library for opening DICOM files in c#. I am able to access the dicom file with:
var dcm = DICOMObject.Read('dicomfilename');
Then open up the pixel stream using
dcm.PixelStream
How can I save the pixelstream as a bmp image?
I never used the toolkit; but at least till Oct-2014, author of the toolkit was saying following:
Evil DICOM does not have any image classes to help with this. While that might seem strange to not include image tools in a DICOM library, it is not the original intent of the the library. Evil DICOM is more for manipulating and analysis of DICOM data. I used to have some image parts in the old library which I believe is still available on SourceForge. You can take a look, but the PixelData tag has the raw bits to put together an image. .NET has several classes that can help with that, but I don't have anything to write here in this post. If I get some time, I will write a blog post about how to do it on the website (rexcardan.com).
Source: GitHub
Apparently, it was not original intent of the toolkit to include imaging support in toolkit. Not sure if this is changed since then. Author was planning to write an article to achieve this through DotNet; not sure if he wrote any then after. Old library from SourceForge may create other issues as it might not have been updated since long.
You can find some example code here.
I am in need of converting a base64 encoded svg to a png and then returning it to the client to be rendered.
The idea is that I am drawing an svg on the client using d3.js and I need to convert it to png.
I tried taking the javascript root and writing the svg on the canvas and then converting it toDataUrl but IE has problems with this on all versions so this is not a viable option.
I have searched online a bit and all I could find is Inkscape.
This is not a viable solution for me because of limited access on the server and frankly I don't think it's a good idea to install an entire application for a simple functionality.
Is there any other solution that can take a base 64 encoded svg and return a png that can be displayed in an image?
I found that since I have to support IE 11 I instead went with canvas to blob to PNG using "canvas-toBlob.js" and "FileSaver.js"
$("#save-btn").click(function()
{
$("#myChart").get(0).toBlob(function(blob)
{
saveAs(blob, "chart_1.png");
});
});
https://jsfiddle.net/mfvmoy64/155
I am facing the same issue, however I been able to render the SVG into an image so your users could right click to download the image or right click on the canvas. There is also Canvg which has a library that appears to work with IE, however it is not accurate for complex SVG and so does not meet my needs. Perhaps it will help you.
I have code in my question that will work in IE, just use the IMG or Canvas object, you do not need to call toDataURI.
Checkout Canvg, it might be of help.
Good luck! If you find a better solution, please let me know. :-)
I'm working with a set of DICOM images that are 512(columns) X 384(rows)
Is there a tool that would make the images 512X512? That is, filling the rows in this case to make it 512.
I've researched VTK with no luck.
Thanks!
Argh, you was almost there! In fact, VTK is not the proper tool for that. ITK is.
To be precise, VTK is for 3D visualization (that is, rendering of 3D objects), while ITK is specifically concerned for image processing.
So, using ITK, you could use a padding filter, here's a complete example from the official wiki, ready to be compiled and executed: http://public.kitware.com/pub/itk/Examples/src/Filtering/ImageGrid/PadAnImageWithAConstant/Documentation.html.
But, if you want to do the things in an easier way, I suggest MATLAB (ITK could be difficult to configure). In this case, this post could help: Padding an image in MATLAB.
Good luck!
I'm having issues with TIFFs
Here is what I have to do, we have tiff images saved into the database, these images are CCITT4 compressed with a number of required tags, these include:
RowsPerStrip must be the ImageLength
Photometric Interpreation must be MinIsWhite
Multi-strip image format is not allowed
My problem is, I'm using the built in System.Drawing.Bitmap/Image objects, which happen to change the values of these when I put it into the object, I've tested this by saving the byte[] to a tiff directly from the database, checked the tags, they are fine.. but when i put the bytes into an Image object then save to file, they are modified.
To make things worse, I'm needing to add a text to the image before saving it.
So I need a component that will allow me more control with TIFF (and they must be tiff), and be able to add text to an image or be able to use the Graphics object.
I've tried using LibTiff but I have yet to see any examples on how to use this component,
any suggestions?
You can use our free and open-source LibTiff.Net library for this. It is freely available for all uses under a BSD license. The just released version 2.0 contains good documentation and number of samples.
There are samples that show how to convert any non-tiled TIFF image to the TIFF image which have all data written in a single strip and how to convert a System.Drawing.Bitmap to 1-bit CCITT single strip TIFF image.
I have never used the built int System.Drawing.Bitmap objects to do this. I personally use LeadTools, but it isn't free. It is however a robust and fairly straightforward API. I primarily use it for GEOTiff which contain specific data tags for image location data.
There is a 60 day evaluation if you would like to try it out.
I use FreeImage. There's a C# .NET wrapper available too.
The IEvolution component set from HiComponents is now totally free (no source) - http://www.hicomponents.com. A very powerful .NET imaging toolkit.
How do I load .dds texture files as an Image in C#? There's nothing useful on google that I could find.
The more information with samples you give me,the better it will be for me to understand it.
I had the same issue. Here is a good solution.
Source: http://www.mastropaolo.com/devildotnet/
Download Version 1.3 from that link (bottom of page)
Add the Devil.NET.dll as a reference to your application
Use the code that I have supplied below.
PictureBox1.Image = DevIL.DevIL.LoadBitmap(DDS_File_Path)
It's really that easy. We owe the DevIL .NET Wrapper creator a beer.
I think the short answer is that you don't. The documentation says that the supported formats are BMP, GIF, EXIG, JPG, PNG and TIFF.
Update: there seem to be a number of converters to be found through Google, that might help you out. Also, as Wayne suggests, look at XNA (if you didn't already). The Texture2D.FromFile method seems to handle the .dds files, but I never used it myself so I can't say if it is what you are looking for or not...
You might want to take a look at the Microsoft's XNA Game Studio SDK to load the textures in memory and possibly capture the images in a System.Drawing.Graphics usable way.