ndarray-warp

WebJar for ndarray-warp

License	MIT
GroupId	org.webjars.npm
ArtifactId	ndarray-warp
Last Version	1.0.1
Release Date	Mar 10, 2018
Type	jar
Description	ndarray-warp WebJar for ndarray-warp
Project URL	http://webjars.org
Source Code Management	https://github.com/scijs/ndarray-warp

Download ndarray-warp

Filename	Size
ndarray-warp-1.0.1.pom
ndarray-warp-1.0.1.jar	5 KB
ndarray-warp-1.0.1-sources.jar	22 bytes
ndarray-warp-1.0.1-javadoc.jar	22 bytes

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/org.webjars.npm/ndarray-warp/ -->
<dependency>
    <groupId>org.webjars.npm</groupId>
    <artifactId>ndarray-warp</artifactId>
    <version>1.0.1</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/org.webjars.npm/ndarray-warp/
implementation 'org.webjars.npm:ndarray-warp:1.0.1'

Gradle Kotlin

// https://jarcasting.com/artifacts/org.webjars.npm/ndarray-warp/
implementation ("org.webjars.npm:ndarray-warp:1.0.1")

Apache Buildr

'org.webjars.npm:ndarray-warp:jar:1.0.1'

Apache Ivy

<dependency org="org.webjars.npm" name="ndarray-warp" rev="1.0.1">
  <artifact name="ndarray-warp" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='org.webjars.npm', module='ndarray-warp', version='1.0.1')
)

Scala SBT

libraryDependencies += "org.webjars.npm" % "ndarray-warp" % "1.0.1"

Leiningen

[org.webjars.npm/ndarray-warp "1.0.1"]

Dependencies

compile (2)

Group / Artifact	Type	Version
org.webjars.npm : cwise	jar	[1.0.4,2)
org.webjars.npm : ndarray-linear-interpolate	jar	[1.0.0,2)

Project Modules

There are no modules declared in this project.

ndarray-warp

Inverse image warping operations for ndarrays.

Example

//Load input image
var lena = require("luminance")(require("lena"))

//Allocate storage for result
var result = require("zeros")([512, 512])

//Apply warp
require("ndarray-warp")(result, lena, function(out, inp) {
  var dx = inp[0] - 256
  var dy = inp[1] - 256
  var r  = Math.sqrt(dx * dx + dy * dy)
  var theta = Math.atan2(dy, dx)
  
  out[0] = 0.9 * r * Math.cos(theta + 0.01 * r) + 256
  out[1] = 0.7 * r * Math.sin(theta + 0.01 * r) + 256
})

//Save the result to stdout
require("save-pixels")(result, "png").pipe(process.stdout)

Which produces the following image:

Install

npm install ndarray-warp

require("ndarray-warp")(output, input, map(out_coord, in_coord))

Applies an inverse warp to an image

• output is an ndarray image that gets the result of applying the warp

• input is an ndarray iamge that is warped

• map(result, coord) is a mapping from the coordinates of out image to input image.

  • result gets the resulting coordinate in input
  • coord is the coordinate in output

Credits

(c) 2013 Mikola Lysenko. MIT License

Versions

Version
1.0.1 Mar 10, 2018