Popular recipes tagged "image" but not "graphics"

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/

Saving a numpy array to png image using fitz / MuPDF (PyMuPDF) (Python)

2016-03-19T12:57:38-07:00

Python recipe 580630 by Harald Lieder (fitz, image, mupdf, numpy, png, pymupdf). Revision 2.

If a pixel array is defined in numpy, it can be saved as a PNG image VERY fast if you use PyMuPDF.

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.

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.

Mandelbrot Fractal image output to ppm file (Python)

2015-01-17T19:21:47-08:00

Python recipe 579006 by FB36 (fractal, image, images, math, mathematics).

It creates image output without using any external library.

PPM image files can be viewed and converted to other image file formats using many applications, GIMP or IrfanView for example.

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.

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.

parse png image (Python)

2013-05-27T22:02:07-07:00

Python recipe 578534 by judy (height, image, parse, png, width).

parse png image find all chunks width height

Auto Insert CSS Image Width/Height Macro: (JavaScript)

2011-11-16T15:23:03-08:00

JavaScript recipe 577948 by Skye Giordano (css, height, image, width).

Based on the macro at http://community.activestate.com/forum/html-editing-img-tag-expansion-etc I hacked together this alternate version that will auto insert the width: and height: of an image background in a CSS rule turning this:

background: url(http://server.com/myImg.jpg) 0 0 no-repeat;

...into this:

background: url(http://server.com/myImg.jpg) 0 0 no-repeat; height: 252px; width: 200px;

Convert Image Format (Python)

2011-09-30T10:46:21-07:00

Python recipe 577886 by s_h_a_i_o (convert, format, image). Revision 2.

Simple GUI to allow converting images from one format to another. Available formats are: .gif .jpg .png .tif .bmp Uses PIL.

This is short and direct enhancement from recipe http://code.activestate.com/recipes/180801-convert-image-format. Two new features added:

Optional deletion of the original image files.
Optional recursive file selection. Implemented using http://code.activestate.com/recipes/577230-file-path-generator-from-path-patterns/

note This assumes recipe/577230 is located in filePattern.py (see first import below)

jpg2pdf (Python)

2011-07-17T19:49:58-07:00

Python recipe 577798 by Sundar Srinivasan (image, jpeg, pdf, reportlab).

Program to convert JPEG to PDF. Technically it just embeds the JPEG in a landscape US letter size PDF page. When you might need it?: When you have to scan a document and do not have scanner handy, you can take a photograph of the document with webcam, and embed the JPEG into PDF - effectively works as a scanner.

scale rectangle while keeping aspect ratio (Python)

2011-02-20T22:36:39-08:00

Python recipe 577575 by Romain Dartigues (image, math, resize, simple). Revision 2.

Resize a rectangle (ie.: an image) while keeping the aspect ratio, without float.

You can scale up and down the proportions so the edges will be either at most or at least the given one.

Write a PNG image in native Python (Python)

2010-10-28T12:03:52-07:00

Python recipe 577443 by Campbell Barton (alpha, image, pil, png, save).

This is a simple PNG writing function, intended to be as small as possible. It only supports RGBA 32bit PNGs and the input should be a buffer of rgba bytes.

Tested for python 2 and 3.

Dynamical Billiards Simulation Map (Python)

2010-11-07T18:21:06-08:00

Python recipe 577455 by FB36 (chaos, fractal, image, math, mathematics, pil). Revision 4.

It creates fractal-like map plots from the simulation.

(See my other post titled "Dynamical Billiards Simulation" first!)

I had to keep image size and maxSteps small otherwise the calculation takes too long!

(It shows what percentage of calculations completed every 10 seconds also.)

Sierpinski Triangle Fractal using HTML5 Canvas (JavaScript)

2010-07-07T15:07:30-07:00

JavaScript recipe 577294 by FB36 (fractal, image, math).

Sierpinski Triangle Fractal using Line Automaton (1D CA). The 1D CA rule used is actually Pascal's Triangle Mod 2. Tested only using Firefox 3.5.

C# Image Resize (Java)

2010-08-06T20:56:16-07:00

Java recipe 577347 by John Hurliman (csharp, image, resize).

Resize a GDI+ image using C#

Mandelbrot Fractal using HTML5 Canvas (JavaScript)

2012-12-28T01:01:09-08:00

JavaScript recipe 577277 by FB36 (fractal, image, math). Revision 3.

Mandelbrot Fractal using HTML5 Canvas. (Do not forget to change file extension to HTML after downloading it.)

Julia fractals (Python)

2010-03-26T04:47:44-07:00

Python recipe 577120 by FB36 (fractal, image, math, random). Revision 2.

It draws a randomly selected Julia fractal set each time.

Floyd-Steinberg dithering algorithm (Python)

2009-06-02T01:28:46-07:00

Python recipe 576788 by Alan Holt (algorithm, dithering, floyd_steinberg, image, manipulation).

Floyd-Steinberg dithering is an image dithering algorithm (see http://en.wikipedia.org/wiki/Floyd-Steinberg for more details). While the algorithm is mainly for image manipulation, I use it to create random locations for sensor networt devices.