I'm currently searching for a C# image recognition library.
What I want to do:
I want to write a function that scans an image and returns if another image is part of it. Or at least something that looks familiar in case that the angles of the two objects are different.
The link to a possible library and a short code example would be great!
Thank you in advance!
Since you didn't mention that you are only looking for free libraries, here are some paid ones:
MVTech HALCON
Cognex VisionPro
Both have demo versions and quite good .Net wrappers bundled to the SDK, and I think both have the functionality you need. In Halcon, you might want to try different matching algorightms (gray value based, descriptor based, etc.), while in VisionPro PatMax or PatQuick might suit your needs. But obviously you have to try which one is the best for your specific problem.
EmguCV (http://www.emgu.com/wiki/index.php/Main_Page) is a good .NET OpenCV wrapper. It has a bunch of sample projects bundled. Run samples and you will get the idea of what can be done and how.
The Accord.NET library is not actually an image recognition tool set, however it provides the base for what you are aiming for. It contains many Imaging classes required for building an image recognition system. Accord.NET is LGPL licensed, except for some parts of it (e.g. its FFmpeg wrapper project).
Related
I use Open XML SDK tool to parse pptx-files. Now I am going to develop my own .NET library/tool to generate an image from a PowerPoint slide. Open XML SDK in principle is not for such tasks, and I do not know where to start research?.
maybe to solve it better to use another programming language, for example, C++ (I also know it) with some library?
or it may be necessary intermediate convert pptx into some another format, for example, HTML and only then to image?
I also tried to investigate Aspose.Slides and Spire.Presentation libraries' dependencies in NuGet to know what they use to an image generation, but these attempts did not succeed.
This looks like a good starting point: Presentation to image conversion
The cited versions are old, but the syntax is still the same: PPT slides to images
My mistake, I misunderstood the end goal.
As mentioned in the EMGU documentations ".Net wrapper to the OpenCV image processing library"
We depended on the functions we could find online but we really didn't figure out how to use those exact OPENCV C++ functions in the opencv documentations like blob?
How to use them in the EMGU platform?
I would suggest looking in the EmguCV source code for the OpenCV functions you are looking for and see how they are wrapped. It is all there.
There is also the need to move data between the managed side and the unmanaged side.
Doug
EmguCV provides a class called CvInvoke which wraps a lot of the basic opencv functionality. The previous link goes for the EmguCV 3.4.3 documentation. Maybe you need another version. Anyway I recommend to also check other classes aside from CvInvoke. The API documentation should be a good starting point.
I want to create my own Google Map like this:
My problem is that I can't load and edit my large images.
My Images:
PNG / JPG
700 MiB
300000px x 300000px
My attempts:
ImageMagick
.NET C# / BitmapImages ...
C++ / OpenCV
general image classes in Java and Python
With which language / library I can edit these big images.
I help maintain libvips, an image processing library designed to work with very large images. It's free and works on Linux, Mac and Windows. You can use it from the command-line, C#, C/C++, Python, Ruby and others.
You can make your google maps tiles from the command-line like this:
vips dzsave hugefile.tif myoutputdir --layout google
Or from Python (for example) like this:
import pyvips
image = pyvips.Image.new_from_file("somehugefile.tif", access="sequential")
image.dzsave("filename/of/pyramid", layout="google")
And it'll scan your huge tiff image and generate all the tiles. It's fast, it needs little memory and it'll work on images of any size. I regularly make 200,000 x 200,000 deepzoom images from microscope slides using my small laptop.
There's a chapter in the libvips docs introducing dzsave and explaining how to use it.
This is not a full answer, but I need a little more space than a comment can give.
Take a look at the large image support section on the ImageMagick or the discussion board.
This answer mentions the VIPS package which might be helpful.
You might also consider posting in photography stackexchange, or even blender stackexchange - for example I saw this answer which mentions writing individual image tiles - also here, although that question is about rendering. Blender is not specifically for image processing and editing, but it's pretty amazing and flexible and has a very active and supportive community. You can use python within Blender as well.
You could also think of asking in gis stackexchange.
When you post in the other stackexchanges, take a look around first and make sure you write your question so that it does not look too off-topic for that site.
Good luck - it seems tiling is everywhere!
need a bit of help here. Does anyone know how to open files such as PCM, PRF, PAD, KMP, STY, and PCG in .Net? It doesn't matter if it is included in .Net or if it is from a third-party library. I need to be able to view their content, edit them, and convert them from one format to another.
Thanks.
nAudio is going to be the library of choice here. It's the easiest one to work with on the market that I've found. Further, we have an application in production today serving 14K+ users with that library, so it's production ready.
Alvas.Audio allows to convert many types of audio files with help DirectShow filters. There are many examples of the use of the library.
hi
I am developing a video capture application using C#.net. i captured
video through webcam and saved it as a JPEG images then i want to make a
wmv file with those images. how can i do that what are the basic steps needed for that can any body help
I am working on this myself. I have found two ways that may be possible - both require the purchase of an outside library.
The first one looks to be the easiest but costs the most, although it will allow you to use it for free you will just have to deal with a pop up telling you to purchase the library: http://bytescout.com/products/developer/imagetovideosdk/imagetovideosdk_convert_jpg_to_video.html
The other involves using Microsoft Encoder 4. I am still working on this one. You can get the free version here: http://www.microsoft.com/download/en/details.aspx?id=18974
C# doesn't natively support much in the way of sound or video so outside reference assemblies seem to be a necessity.
Right now that is the best help I can offer until I figure it out.