Popular recipes tagged "image" but not "canvas"

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!

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.

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.

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.

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.

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

Perlin Noise Generator (Python)

2013-02-23T05:23:24-08:00

Python recipe 578470 by FB36 (fractal, graphics, image, images, math, mathematics, pil). Revision 2.

Perlin Noise Generator using Bilinear Interpolation.

Bilinear Interpolation (Python)

2013-02-23T04:00:52-08:00

Python recipe 578469 by FB36 (graphics, image, math, mathematics, pil).

Creates a surface from a grid of random numbers using Bilinear Interpolation.

Bezier Curve using De Casteljau algorithm (Python)

2011-11-25T02:33:54-08:00

Python recipe 577961 by FB36 (graphics, image, math, mathematics).

Draws a random Bezier Curve using De Casteljau algorithm.

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.