Popular recipes tagged "meta:requires=pil"

Tkinter frame with gradient (Python)

2017-03-11T03:43:56-08:00

Python recipe 580761 by Miguel Martínez López (canvas, frame, gradient, tkinter). Revision 4.

Frame with linear gradient using PIL.

It's also possible to make the same trick using tkinter PhotoImage.

http://stackoverflow.com/questions/10417524/why-is-photoimage-put-slow

But PIL is more efficient:

https://groups.google.com/forum/#!topic/comp.lang.python/nQ6YO-dTz10

Possible values for orient are: VERTICAL, HORIZONTAL. If orient is "vertical", then width is mandatory. If orient is "horizontal", then height is mandatory. If steps is None, then the gradient is composed of adjacent lines.

One possible practical application of gradient frames are tool bars. Gradient guives a visual clue of when an area starts and when an area finish.

tkinter custom fonts (Python)

2017-04-10T01:07:11-07:00

Python recipe 580778 by Miguel Martínez López (font, tkinter). Revision 2.

One Windows the best solution is to use the trick explained here:

http://stackoverflow.com/a/30631309

Another possibility is to use PIL. creating an image with the text and a specific font.

I provide 2 classes: CustomFont_Label and CustomFont_Message.

CustomFont_Message displays multilines but requires the width parameter.

Metro Spinner for Tkinter (Python)

2017-04-10T21:14:36-07:00

Python recipe 580777 by Miguel Martínez López (canvas, image, pil, rotation, spinner, tkinter).

I create a rotating image class RotatingIcon inspired and based on this code:

http://stackoverflow.com/questions/15736530/python-tkinter-rotate-image-animation

Features:

Methods to stop and start the animation
The animation automically stops when the window is not mapped, and the animation continues when the window is mapped again
Time setting to control the speed of the animation
All the formats accepted for PIL could be used. XBM format is automatically converted to Tk Bitmap. The advantage of Bitmats is the possibility to change the color of the foreground.

I added 6 different styles of spinners with different sizes.

I used fontawesome.io for the icon generation.

For more metro widgets see here:

https://code.activestate.com/recipes/580729-metro-ui-tkinter/

Image background for tkinter (Python)

2017-04-12T19:37:06-07:00

Python recipe 580782 by Miguel Martínez López (background, tkinter). Revision 3.

This is only a proof of concept.

In my first example, PIL is required. I use PIL also to draw the text over the background. I use the place geometry manager to position the entry.

In my second example, I use a canvas widget to draw text over image. I also use the canvas to create other widgets over the background.

Tkinter Animated GIF (Python)

2017-04-10T11:27:05-07:00

Python recipe 580708 by Miguel Martínez López (gif, tkinter). Revision 10.

Tkinter GIF in motion. It uses the "after" command of Tcl and PIL.

Add path to GIF to make the example working.

Image to ASCII Art Converter (Python)

2016-09-25T21:24:12-07:00

Python recipe 580702 by FB36 (graphics, image, images, pil).

ASCII Art Generator (Image to ASCII Art Converter)

Input file maybe JPG, PNG, GIF etc. Output file name maybe output.txt etc.

Image Projection Onto Sphere (Python)

2016-07-31T22:50:28-07:00

Python recipe 580695 by FB36 (graphics, image, images, image_processing, imaging, math, mathematics, pil).

Image projection onto sphere using Equirectangular map projection.

Download the test image from the Wikipedia page!

Image Resizer (Python)

2016-05-22T16:45:52-07:00

Python recipe 580663 by FB36 (image, images, utilities, utility). Revision 2.

Image resizer/converter command-line utility.

Random Planet Generator Using Plasma Fractal (Python)

2016-01-25T23:05:25-08:00

Python recipe 580495 by FB36 (fractal, graphics, image, images, math, mathematics).

Random Planet Generator using 3D Plasma Fractal and Voxel-based Ray Tracing for rendering.

Instead of generating 2D Plasma Fractal and projecting onto sphere, it generates 3D Plasma Fractal (cube) and cuts sphere from it.

Reaction Diffusion Simulation (Python)

2015-10-16T19:52:02-07:00

Python recipe 579114 by FB36 (chaos, fractal, graphics, image, images, math, mathematics, physics, simulation). Revision 2.

Reaction-Diffusion Simulation using Gray-Scott Model.

Quasicrystal Pattern Generator (Python)

2015-08-08T20:50:23-07:00

Python recipe 579094 by FB36 (fractal, graphics, image, images, math, mathematics).

Quasicrystal Pattern Generator

2D Discrete Fourier Transform (Python)

2015-01-03T03:39:34-08:00

Python recipe 578997 by FB36 (image, images, image_processing, math, mathematics, signal_processing).

2D Discrete Fourier Transform (DFT) and its inverse.

Calculates 2D DFT of an image and recreates the image using inverse 2D DFT.

Computation is slow so only suitable for thumbnail size images.

Draw Text To Image (Python)

2015-07-13T18:04:30-07:00

Python recipe 579013 by FB36 (image, images, pil). Revision 2.

PIL does not allow resizing default bitmap font. This code resizes it by itself.

The disadvantage is slow speed but the advantage is it becomes possible to set color of each pixel of text foreground and background.

As an example I set foreground to reverse colors and background to grayscale.

Image Converter (Python)

2015-01-18T19:14:38-08:00

Python recipe 579007 by FB36 (conversion, conversions, convert, converter, image, images, pil).

Converts an image from one format to another using PIL.

2D Fluid Simulation using FHP LGCA (Python)

2014-08-18T05:01:04-07:00

Python recipe 578924 by FB36 (math, mathematics, physics, simulation).

2D Fluid Simulation using FHP LGCA (Lattice Gas Cellular Automata)

Simulates fluid flow in a circular channel.

It works really slow but I think it can be a lot faster if it modified for NumPy and possibly Py2Exe.

But my main goal was to provide easy to understand code (not performance) anyway.

Circle Inversion Fractals (Python)

2013-10-30T03:53:31-07:00

Python recipe 578765 by FB36 (fractal, math, mathematics).

Circle Inversion Fractals (Apollonian Gasket)

Sort images from different sources by picture taken date (Exif) (Python)

2013-09-24T12:43:31-07:00

Python recipe 578672 by Rutger Saalmink (chronological, exif, image, order, photo, picture). Revision 3.

On some occasions/events, pictures will be taken by different camera's, mobile phones, etc. In order to sort these photos chronologically, it does not suffice using the file's date modified/created set by the OS. The following script obtains, from multiple sources, the pictures' taken date stored in the accompanying Exif data and outputs them all chronologically in a single directory.

Random Spiral Fractals (Python)

2013-09-29T05:35:20-07:00

Python recipe 578658 by FB36 (fractal, math, mathematics). Revision 2.

This based on another of my posted codes, titled "Spiral IFS Fractals".

Hofstadter Butterfly Fractal (Python)

2013-09-23T03:18:02-07:00

Python recipe 578670 by FB36 (fractal, math, mathematics, physics). Revision 2.

Hofstadter Butterfly Fractal

Voxel Based Ray Tracing (Python)

2013-08-29T06:11:41-07:00

Python recipe 578652 by FB36 (graphics, image, math, mathematics).

The standard ray tracing algorithm seems unnatural to me because everytime a ray reflects/refracts all (primitive) objects in the scene must be tested for intersection; no matter where they located!

In this method there is no such thing. It just moves each ray voxel by voxel until it hits an opaque/reflective(/refractive) voxel.

I made many simplifications so the image is crude.