Compositing scripts

imagemagick usage example

Overlap masks

Puts 4 image sequences in 2x2 array. Each animation blends into its neighbours using the included masks.

command to create a mask for the horizontal overlap of two images

convert -size 333x300 xc:white xc:black   -size 333x120 gradient: +swap -append -rotate 90    overlap_mask.png

command to create a mask for appending two images vertically

convert -size 720x243 xc:white xc:black   -size 720x90 gradient: +swap -append -flip    overlap_mask_total.png

file:scripts/overlap_masks

script

commands: extend, gravity, composite, limit area, limit memory

bash scripts: cyclical

file:scripts/twirling_array

Twirling array

Script for 4 twirling image sequences in a 2x2 array, animations resize to fit in screen.

commands (montage): rotate, tile, geometry

bash scripts: cyclical, decimal_add

Small twirl

Script for 4 twirling image animations in a 2x2 array, fits screen size to stay the same size.

As can be seen by the previous example imagemagick will change the size of the original image so that no overlapping will occur and the images remain within the frame. To counteract this the original images have to be sized so that they will remain within their quarter of the picture regardless of their angle of rotation.

math

The hypethenuse of the image may at no point exceed the vertical of the frame. Assuming we're using a 1/4 pal frame size for a 2x2 array, I used a web hypothenuse calculator to calculate the image size.

opposite=360

adjacent=288

angle-q=51.34 (can easily be calculated using opposite and adjacent)

angle-b=38.66 (can easily be calculated using opposite and adjacent)

using angle-q and a hypothenuse of 288 (shortest point in the square)

opposite=224

adjacent=180

script

commands: size, xc:, background, rotate, gravity, composite, append

bash scripts: cyclical, decimal_add

file:scripts/smalltwirl

Circle twirl

Script for 4 twirling image sequences in a 2x2 within diffused circle masks (mask commands incl.)

creating circle mattes

create circle

convert -size 360x288 xc:none   -fill black -draw "circle 180,144 100,70" circle.png

sample image

blur circles

convert circle.png -channel RGBA -blur 0x20  black_blurred.png

sample image

make blur visible, probably not necessary if other -compose method is used in script

convert  black_blurred.png -channel matte -separate +matte matteblackblur.png

sample image

script

commands: rotate, compose Screen, composite, append, gravity

bash scripts: cyclical, decimal_add

file:scripts/circletwirl

Washroom tile look

Script for twirling image animation in a 4x4 array within the original animation using circle masks.

mask commands

Command to create circle which is 1/4 of the size of a pal image (720x576).

convert -size 180x144 xc:none -fill black -draw "circle 90,72 34,27" circlesmall.png

Command to make the above mask transparent everywhere except for the circle.

convert circlesmall.png -matte -transparent white transparentwhite.png

script

commands: crop, rotate, gravity, compose src-in, matte, background none, append, compose src-over, composite

bash scripts: cyclical_repeat, decimal_add_total

file:scripts/washroom

Overlay

Script overlaying one image sequence over another allowing background to show through whites.

commands: -threshold, -compose multiply, -composite

bash scripts: cyclical

file:scripts/overlay

file:scripts/mask_overlay

Crop and mask overlay

Script overlaying one image animation over another allowing background to show through mask created by a third.

Script to crop, double, change threshold and resize mask sequence

commands: crop, repage, clone, append, threshold

file:scripts/crop

Script to overlay and mask other two sequences o

commands: composite

bash scripts: cyclical

gif

file:scripts/moving_rotation

Splice

Script overlaying one image sequence over another allowing background to show through mask created by drawing lines.

commands: xc:, stroke, strokewidth, draw "line…", composite, -compose src-over

bash scripts: cyclical repeat, cyclical, multiple_additions

file:scripts/splice

example animated gif

Moving rotation

Script using affine to rotate a sequence 360 degrees and move it across the screen.

Requires installation of the affine_rotate script from imagemagick.

commands: repage, affine, transform, compose copy, compose, crop, background, flatten

bash scripts: cyclical repeat, cyclical, decimal_add_total, multiple additions

file:scripts/superman_swirl

Superman swirl

Script using affine to rotate an animation 360 degrees and flip it head over tails. Like the Phantom Zone in Superman II.

Requires the installation of the affine_distort script for imagemagick.

commands: affine, transform, crop, background, flatten

bash scripts: cyclical repeat, cyclical, decimal_add_total, trueloop

Corridor

Script distorting the perspective of two animations and appending them.

commands: matte, virtual-pixel background, background, distort perspective, virtual-pixel transparent, composite

bash scripts: cyclical

file:scripts/corridor

animated gif example

Hard compose

Script laying one image over another using the compose command difference.

Difference: Subtracts the darker of the two constituent colors from the lighter. Painting with white inverts the destination color. Painting with black produces no change.

commands: compose difference, crop, composite

bash scripts: cyclical

file:scripts/hardcompose

animated gif example

Rotate over background

Combine rotating image with composed background.

commands: resize, compose difference, composite, repage, affine, transform, compose copy, compose src-over, flatten

bash scripts: decimal_add_total, multiple additions, renumbering loop

Requires installation of the affine_rotate script from imagemagick.

Three arguments must be given for this script:

./rotate+bg folder1/ folder2/ folder3/

The first two folders containing the images that will make up the background and the third the images that will twirl across the foreground.

file:scripts/rotate+bg

file:scripts/swirl-implode

Swirl implode

Swirl-implode from one animation to another.

commands: swirl, implode, compose, border, shave, bordercolor, compose src-over, composite

bash scripts: renumbering loop, sequential_number_feed

http://www.fmwconcepts.com/imagemagick/3Drotate/index.php

Integrating Fred's imagemagick scripts

Fred's ImageMagick Scripts by Fred Weinhaus offers a myriad of bash scripts for Imagemagick. Some of them are for creating animations albeit only with single still images. These are my first attempt at altering these scripts so the series of images can be animated.

3Drotate animation

As the name suggests an animation is rotated in 3D. Here is the site describing the 3Drotate which rotates the individual images. It must be downloaded and installed into a valid path:

Further down in the same page you'll find the animation script which I have adapted to allow for series of images.

commands: delay, page, virtual-pixel, background, distort, perspective

bash scripts: checksize, cyclical, floating point removal, decimal add total variable

file:scripts/3Drotate_animate

Pseudocolor

Images must be grayscale. A rainbow-colored lookup table is used to color in the images. The colors which substitute the various shades of gray changes through the animation. Based on a script found at Fred's ImageMagick Scripts

commands: size, xc:, channel, seperate, colorspace HSB, compose copyred, compose copygreen, compose copy blue, composite, colorspace RGB, rotate, roll, -clut

bash scripts: cyclical, nested_trueloop

file:scripts/suedocolor

file:scripts/rotating_box

3D box

This script creates an array of boxes which rotate. 3 animations run on the sides of the boxes. The script 3DBox must be installed in a valid path.

There's a problem with imagemagick that you can't create the box when it is shown at or near a right angle. How near to a right angle the image can be depends on its size. There is a noticeable skip in the rotation because these images have to be left out.

There's also the problem that this script overheats my laptop. Strangely it doesn't overheat my powermac. Use with caution.

commands: append

bash scripts: renumbering loop, divisor_chooser

wipe

PURPOSE: To apply an animated transition between two sets of images.

DESCRIPTION: WIPE applies an animated transition between two sets of images using a mask image to control the transition. The first set of images will show where the mask is black and the second set of images will show where the mask is white. The mask will be made gradually more an more white as each frame is composited. NOTE that this is not a true warping morph. It is simply an animated masked composite.

file:scripts/wipe

fxwipe

PURPOSE: To create an animated transition between two image sequences using a special effect distortion.

DESCRIPTION: FXWIPE creates an animated transition between two images sequences using a special effect distortion. The special effects distortions include: blur, explode, implode, pixelize, recursion, spin, spread, swirl, zoomin and zoomout.

file:scripts/fxwipe