mirror of
https://github.com/publiclab/image-sequencer.git
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801ea35393
* fixed blur module as well as issue with no output when running debug * added saturation module * fixing requested changes * fixing exportBin * requested fixes
85 lines
2.9 KiB
JavaScript
Executable File
85 lines
2.9 KiB
JavaScript
Executable File
module.exports = exports = function(pixels,blur){
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let kernel = kernelGenerator(blur,1)
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kernel = flipKernel(kernel)
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var oldpix = pixels
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for(let i=0;i<pixels.shape[0];i++){
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for(let j=0;j<pixels.shape[1];j++){
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let neighboutPos = getNeighbouringPixelPositions([i,j])
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let acc = [0.0,0.0,0.0,0.0]
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for(let a = 0; a < kernel.length; a++){
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for(let b = 0; b < kernel.length; b++){
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acc[0] += (oldpix.get(neighboutPos[a][b][0],neighboutPos[a][b][1],0) * kernel[a][b]);
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acc[1] += (oldpix.get(neighboutPos[a][b][0],neighboutPos[a][b][1],1) * kernel[a][b]);
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acc[2] += (oldpix.get(neighboutPos[a][b][0],neighboutPos[a][b][1],2) * kernel[a][b]);
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acc[3] += (oldpix.get(neighboutPos[a][b][0],neighboutPos[a][b][1],3) * kernel[a][b]);
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}
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}
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pixels.set(i,j,0,acc[0])
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pixels.set(i,j,1,acc[1])
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pixels.set(i,j,2,acc[2])
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}
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}
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return pixels
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//Generates a 3x3 Gaussian kernel
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function kernelGenerator(sigma,size){
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/*
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Trying out a variable radius kernel not working as of now
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*/
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// const coeff = (1.0/(2.0*Math.PI*sigma*sigma))
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// const expCoeff = -1 * (1.0/2.0 * sigma * sigma)
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// let e = Math.E
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// let result = []
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// for(let i = -1 * size;i<=size;i++){
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// let arr = []
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// for(let j= -1 * size;j<=size;j++){
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// arr.push(coeff * Math.pow(e,expCoeff * ((i * i) + (j*j))))
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// }
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// result.push(arr)
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// }
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// let sum = result.reduce((sum,val)=>{
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// return val.reduce((sumInner,valInner)=>{
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// return sumInner+valInner
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// })
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// })
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// result = result.map(arr=>arr.map(val=>(val + 0.0)/(sum + 0.0)))
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// return result
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return [
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[2.0/159.0,4.0/159.0,5.0/159.0,4.0/159.0,2.0/159.0],
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[4.0/159.0,9.0/159.0,12.0/159.0,9.0/159.0,4.0/159.0],
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[5.0/159.0,12.0/159.0,15.0/159.0,12.0/159.0,5.0/159.0],
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[4.0/159.0,9.0/159.0,12.0/159.0,9.0/159.0,4.0/159.0],
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[2.0/159.0,4.0/159.0,5.0/159.0,4.0/159.0,2.0/159.0]
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]
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}
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function getNeighbouringPixelPositions(pixelPosition){
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let x = pixelPosition[0],y=pixelPosition[1]
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let result = []
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for(let i=-2;i<=2;i++){
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let arr = []
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for(let j=-2;j<=2;j++){
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arr.push([x + i,y + j])
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}
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result.push(arr)
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}
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return result
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}
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function flipKernel(kernel){
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let result = []
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for(let i =kernel.length-1;i>=0;i--){
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let arr = []
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for(let j = kernel[i].length-1;j>=0;j--){
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arr.push(kernel[i][j])
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}
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result.push(arr)
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}
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return result
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}
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} |