Is there some easy use image processing/editing library for Cocoa? - image

Like OpenCV
I hope the library can do several simple image edit operation, like DrawLine(UiImage, startPoint, endPoint), or ConvertToGray(UiImage)

CoreImage is the built-in image manipulation library in Cocoa.
For example: What is the best Core Image filter to produce black and white effects?

I'd suggest using OpenCV , which is a great algorithms and image processing library.
Choosing Opencv would give you more future option.
Try this

OpenCV is not meant for image editing. You can do that, but it's like buying a big track to carry your groceries from the market.
The best way to do it is to look into some already integrated image editing libraries. And as I know, in Cocoa there are several of them. CoreImage, mentioned by Dor, is one of them.
And there are some specialized image editing / UI toolkits that may help you better than OpenCV. You may check whether ImageMagik or QT are available for Mac/iOS

Related

Programming language selection for showing image with other images on

I want to make a program that displays an image with other images on it (a map with various icons on it). What language (and library!) would you recommend, based on these facts:
-I have some basic oop knowledge
-I'll need a free and windows OS IDE for that
I would guess java? But it is not easy to compress my question to a good quality google search string....
displays an image with other images on it
Almost every language can achieve this. Such as Python with Pillow C++ with opencv and many other options. (I believe most of mainstream languages will have their own image library)
The problem is, what you want to implement specifically?
if you just want to put some images on to another image, and you do not need extra interactive function. Go with Python and Pillow, it is easy to learn and can perfectly solve your problems.

Library for photo-booth style effects

Are there any good tools or libraries that do image effects similar to Photo Booth on OS X? It doesn't have to be live, just applying the effect to an image would be enough. As a bonus: python bindings preferred.
What about image magick ?
It does a lot of effect, is Python compliant and can do way more than what you aim at.
You can use it in console or through the api.
Example of effects (sepia included)
With it, you can distort, blur, watermark, . . . whatever you want :)
It supports a lot of languages, and there is even a port to android on github

DICOM and OpenCV

Hai everyone,
I would like to know whether OpenCV can process DICOM images for 3D reconstruction purpose. Is there any other software that can handle DICOM images other than MATLAB. What about VC++?
Check out VTK. It natively handles DICOM images.
OpenCV is extensible and is written in C++ (I'm not familiar with it, just going from the documentation). So a good start would be an open source C++ DICOM library, there are plenty available. Here is a list of 17:
Search I Do Imaging
C++ and dicom? I would recommend DCMTK. Efficient, solid, raliable and open source.

Qt widgets for HDR image display

I'm currently developing a consrol software for a camera that delivers 14 bit/sample grayscale images (specifically it's a scientific x-ray camera).
So far I just used the upper 8 bits and passed those to a QImage, so that I could see something. However now I need to show all detail, a widget that supports HDR and tone/pseudocolour mapping is needed.
Before I start developing such a widget and subclass QImage for HDR support I'd like to know if someone already did this for Qt and published the source under LGPL.
VTK has really good Qt widgets and supports everything what you may need for medical imaging.
Currently we use ParaView. ParaView is based on VTK and Qt, fully open source and easily extensible.

C++ Cross Platform Image Loader for OpenGL

I have tried everything from SDL to DevIL, and they have all failed for various reasons.
SDL segfaults for various reasons, and DevIL is having some weird problem where even after i include IL/ilut.h and linking everything, and including the other headers, it is not defining the functions i need to load images into opengl textures (something about USE_OPEN_GL not being defined). I am asking for any other lib out there for loading bitmaps or png's into a format i can easily convert to opengl, or a solution to the devil problem.
thanks
Both libpng and libjpeg can be rather daunting to build & use -- no wonder there are all sorts of wrapper libraries for both.
A very simple and minimal no-nonsense loader for jpg/png (and some other stuff aswell) without dependencies in a single C file is Sean Barrett's stb_image.c, if you just want to load some image files it adds absolutely minimal overhead to your program and is straightforward to use:
http://nothings.org/stb_image.c
As Adam suggests, I would also recommend to use libpng and libjpeg. You are not specifying if you write in C or C++, but if in C++, then I'd suggest to take a look at two handy thin wrappers on the both libraries: pngxx and jpegxx
LodePNG is a highly compact PNG Loader with no dependencies.
Comment on your experience with DevIL - it works flawlessly for me and many others. Why not try again to resolve your build problems? - shouldn't be too hard)
You can also try FreeImage library. It supports loading different image types and is functionally similar to DevIL, may work out of the box for you.
And about your problem with DevIL, you do not have to build ilu or ilut libraries to make DevIL functional. I would recommend you manage the OpenGL texture objects yourself, including uploading image data to OpenGL side.
SOIL is a decent lightweight one I've used before. It's actually specialized for loading OpenGL textures too.
http://lonesock.net/soil.html
you dont need ILUT to do what you want. you can simply use ilGetData() and glTexImage2d()
Loading bitmaps (.bmp) and netpbm images (.pbm, pgm, .pnm) is fairly trivial, since they store images uncompressed. For loading PNGs, use libpng. For loading JPEGs, use libjpeg. For other image types, use an appropriate library. There's a good change that slapping on 'lib' to the beginning of the image name will give you such a library, e.g. libtiff, libtga, etc.
Once you've loaded and uncompressed the raw image data, loading it into an OpenGL texture is just a matter of calling glTexImage2D() with the right parameters, and a couple of other GL state changes (e.g. how to do mipmapping).
Image Magick with either the C or C++ bindings?
http://www.imagemagick.org/script/index.php
Young but yet great enough SFML could be the one you're searching for. I've used it for numerous projects and all of 'em worked well on all my platforms (Win7 and Ubuntu).

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