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resolves #153 (#180)

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Signed-off-by: tech4GT <varun.gupta1798@gmail.com>
This commit is contained in:
Varun Gupta
2018-02-21 03:58:19 +05:30
committed by Jeffrey Warren
parent 5922b0de58
commit 27ee18b3d2
12 changed files with 869 additions and 207 deletions
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19
src/modules/EdgeDetect/EdgeUtils.js
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@@ -1,4 +1,5 @@
const _ = require('lodash')
var pace = require('pace')
//define kernels for the sobel filter
const kernelx = [[-1,0,1],[-2,0,2],[-1,0,1]],
@@ -8,9 +9,10 @@ let angles = []
let mags = []
let strongEdgePixels = []
let weakEdgePixels = []
module.exports = exports = function(pixels,highThresholdRatio,lowThresholdRatio){
let notInUI
module.exports = exports = function(pixels,highThresholdRatio,lowThresholdRatio,inBrowser){
notInUI = !inBrowser
if(notInUI) var progressbar1 = pace((pixels.shape[0] * pixels.shape[1]))
for(var x = 0; x < pixels.shape[0]; x++) {
angles.push([])
mags.push([])
@@ -31,6 +33,7 @@ module.exports = exports = function(pixels,highThresholdRatio,lowThresholdRatio
mags.slice(-1)[0].push(pixel[3])
angles.slice(-1)[0].push(result.angle)
if(notInUI)progressbar1.op()
}
}
@@ -72,6 +75,7 @@ function changePixel(pixels,val,a,x,y){
function nonMaxSupress(pixels) {
angles = angles.map((arr)=>arr.map(convertToDegrees))
if(notInUI) var progressbar2 = pace((pixels.shape[0] * pixels.shape[1]))
for(let i = 1;i<pixels.shape[0]-1;i++){
for(let j=1;j<pixels.shape[1]-1;j++){
@@ -113,11 +117,13 @@ function nonMaxSupress(pixels) {
pixels.set(i,j,3,mags[i][j])
else
pixels.set(i,j,3,0)
if(notInUI) progressbar2.op()
}
}
return pixels
}
//Converts rasians to degrees
//Converts radians to degrees
var convertToDegrees = radians => (radians * 180)/Math.PI
//Finds the max value in a 2d array like mags
@@ -127,7 +133,8 @@ var findMaxInMatrix = arr => Math.max(...arr.map(el=>el.map(val=>!!val?val:0)).m
function doubleThreshold(pixels,highThresholdRatio,lowThresholdRatio){
const highThreshold = findMaxInMatrix(mags) * 0.2
const lowThreshold = highThreshold * lowThresholdRatio
if(notInUI) var progressbar3 = pace((pixels.shape[0] * pixels.shape[1]))
for(let i =0;i<pixels.shape[0];i++){
for(let j=0;j<pixels.shape[1];j++){
let pixelPos = [i,j]
@@ -137,7 +144,7 @@ function doubleThreshold(pixels,highThresholdRatio,lowThresholdRatio){
?strongEdgePixels.push(pixelPos)
:weakEdgePixels.push(pixelPos)
:pixels.set(i,j,3,0)
if(notInUI) progressbar3.op()
}
}