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phase-unwrap

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phase-unwrap - npm Package Compare versions

Comparing version
0.0.1
to
0.1.0
+1
-1
package.json
{
"name": "phase-unwrap",
"version": "0.0.1",
"version": "0.1.0",
"description": "Phase unwrapping for ndarrays",

@@ -5,0 +5,0 @@ "main": "unwrap.js",

@@ -45,3 +45,2 @@ phase-unwrap

## Install

@@ -48,0 +47,0 @@

@@ -31,2 +31,19 @@ "use strict"

function unwrapImplGetter(data, ptr, stride, n) {
var pi = Math.PI
var pphase = modf(data.get(ptr)), shift = 0
ptr += stride
for(var i=1; i<n; ++i, ptr+=stride) {
var cphase = modf(data.get(ptr))
var d = cphase - pphase
if(d < -pi) {
shift += tau
} else if(d > pi) {
shift -= tau
}
data.set(ptr, cphase + shift)
pphase = cphase
}
}
function unwrapPhase(signal) {

@@ -36,6 +53,7 @@ if(signal.shape.length !== 1) {

}
if(signal.stride[0] === 0) {
return 0
if("generic" === signal.dtype) {
unwrapImplGetter(signal.data, signal.offset, signal.stride[0], signal.shape[0])
} else {
unwrapImpl(signal.data, signal.offset, signal.stride[0], signal.shape[0])
}
unwrapImpl(signal.data, signal.offset, signal.stride[0], signal.shape[0])
return signal

@@ -42,0 +60,0 @@ }