draw lines and text to an image file [closed] - c++

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I want to draw lines and text to an image file in c++. I've already considered using the ppm image format, but there I would have to create functions for getting the pixels of a line etc.
I do NOT want any huge game library with ticks or drawing something in windows on the screen.
Is there anything that I could use for that?
thanks


You can give CImg a try https://cimg.eu/
It is a header-only library and it can do what you're asking for (plus more, you can also use X11 for plotting if you provide the link dependencies for example)

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What is the simplest way to render a series of images in c++? [closed]

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I have been looking around for ways to render images in c++. The only stuff i find is full on GUIs. I do not need to take input from the user and i would prefer if it was pretty simple.
I want my program to output (preferably as a file) a image of filled circles. Then my program will do a step, and i want to render a new frame.
Does anyone have a recommendation?

C++ multidimensional data visualization [closed]

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For a dataset of N records and M columns (features), I want to visualize it in 2d or 3d. Does anyone know if such a c++ library exists?

Thanks to #MatthewLueder's comment pointing out the PCA, I found libpca.

I assume you want online plotting. That is, animation plot at runtime, correct?
If so, then there are few libraries and one of which is gnuplot-iostream http://www.stahlke.org/dan/gnuplot-iostream/. I use it and recommend it. It requires the Boost library however.
Otherwise, you can write your data on files and use in a subsequent step a visualizer of your choice. Again, gnuplot is very powerful.

What's the easiest way to draw line segments in order to visualize the output of some algorithm? [closed]

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I want to draw (dashed) line segments in order to visualize the output of some algorithm. How can I do this?
I know that this question is a bit vague, but I'm open to any kind of visualization method which is easy to use.

I would go for writing an SVG file - it is just text - example here and then use ImageMagick to convert that to a PNG or GIF file with
convert dottedline.svg image.gif
ImageMagick is installed on most Linux distros and is available for free for OSX and Windows.
You could also use Magick++, the C++ library of ImageMagick, or gnuplot - see my answer here.

image manipulation library [closed]

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I need a library for mostly color manipulation, I want to make a image become black and white, and augment the contrast, so that Tesseract (Google OCR library) can read better the images that I throw at it.
Or if someone has a better idea on how to improve Tesseract results, I am all for it.

Try OpenCV
http://sourceforge.net/projects/opencv/
Or imagemagick
http://www.imagemagick.org/script/magick++.php
or CImg, probably the easiest to use: no install it's just a header file.
If you do not want to use a big library you can code the algorithm yourself:
https://web.archive.org/web/20140825114946/http://bobpowell.net/image_contrast.aspx

Is there a good library c/c++/java to generate video with special effects , transitions from a set of images? [closed]

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I need to develop a video generator that takes in a set of images, music files and outputs mp4 videos. The platform is linux. Was wondering if there are any existing libraries that can do this job ?
Thanks

I believe Processing can do what you want.

you can use ImageMagick for video part. It has both good graphics/video library and corresponding console application. For sound embedding use gstreamer.