src/libraries/img/process.js
function (inData, outData, width, height) {
        var c = 1 / 9;
        convolve3x3(inData, outData, width, height,
            [
                [c, c, c],
                [c, c, c],
                [c, c, c]
            ]);
    }
function (inData, outData, width, height) {
        var c = 1 / 9;
        convolve3x3(inData, outData, width, height,
            [
                [c, c, c],
                [c, c, c],
                [c, c, c]
            ]);
    }
function ( inData , outData , width , height ) { var c = 1 / 9 ; convolve3x3 ( inData , outData , width , height , [ [ c , c , c ] , [ c , c , c ] , [ c , c , c ] ] ) ; }
A 3x3 low-pass mean filter
A 3x3 low - pass mean filter