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Merge pull request #57 from ccpandhare/modules

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Added segmented-colormap Module
This commit is contained in:
Chinmay Pandhare
2017-07-13 08:55:18 +05:30
committed by GitHub
parent 4710bba985 030f43d3b3
commit 3b04305c19
4 changed files with 168 additions and 11 deletions
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90
dist/image-sequencer.js vendored
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@@ -35032,10 +35032,11 @@ module.exports = {
'ndvi-red': require('./modules/NdviRed'),
'do-nothing-pix': require('./modules/DoNothingPix'),
'invert': require('./modules/Invert'),
'crop': require('./modules/Crop')
'crop': require('./modules/Crop'),
'segmented-colormap': require('./modules/SegmentedColormap')
}
},{"./modules/Crop":122,"./modules/DoNothing":123,"./modules/DoNothingPix":124,"./modules/GreenChannel":125,"./modules/Invert":126,"./modules/NdviRed":127}],120:[function(require,module,exports){
},{"./modules/Crop":122,"./modules/DoNothing":123,"./modules/DoNothingPix":124,"./modules/GreenChannel":125,"./modules/Invert":126,"./modules/NdviRed":127,"./modules/SegmentedColormap":129}],120:[function(require,module,exports){
function ReplaceImage(ref,selector,steps,options) {
if(!ref.options.inBrowser) return false; // This isn't for Node.js
this_ = ref;
@@ -35212,11 +35213,10 @@ module.exports = function DoNothing(options) {
/*
* Display only the green channel
*/
module.exports = function GreenChannel(options) {
module.exports = function DoNothingPix(options) {
options = options || {};
options.title = "Green channel only";
options.description = "Displays only the green channel of an image";
options.title = "Do Nothing with pixels";
var output;
//function setup() {} // optional
@@ -35419,4 +35419,82 @@ module.exports = function PixelManipulation(image, options) {
}
},{"base64-stream":3,"get-pixels":27,"save-pixels":104}]},{},[116]);
},{"base64-stream":3,"get-pixels":27,"save-pixels":104}],129:[function(require,module,exports){
module.exports = function SegmentedColormap(options) {
options = options || {};
options.title = "Segmented Colormap";
options.colormap = options.colormap || "default";
var output;
function draw(input,callback) {
this_ = this;
function changePixel(r, g, b, a) {
var ndvi = (b - r) / (r + b);
var normalized = (ndvi + 1) / 2;
var res = colormaps[options.colormap](normalized);
return [res[0], res[1], res[2], 255];
}
function output(image,datauri,mimetype){
this_.output = {src:datauri,format:mimetype}
}
return require('./PixelManipulation.js')(input, {
output: output,
changePixel: changePixel,
format: input.format,
image: options.image,
callback: callback
});
}
return {
options: options,
draw: draw,
output: output
}
}
var greyscale_colormap = segmented_colormap([[0, [0, 0, 0], [255, 255, 255]], [1, [255, 255, 255], [255, 255, 255]]]);
var default_colormap = segmented_colormap([[0, [0, 0, 255], [38, 195, 195]], [0.5, [0, 150, 0], [255, 255, 0]], [0.75, [255, 255, 0], [255, 50, 50]]]);
var stretched_colormap = segmented_colormap([[0, [0, 0, 255], [0, 0, 255]], [0.1, [0, 0, 255], [38, 195, 195]], [0.5, [0, 150, 0], [255, 255, 0]], [0.7, [255, 255, 0], [255, 50, 50]], [0.9, [255, 50, 50], [255, 50, 50]]]);
var fastie_colormap = segmented_colormap([[0, [255, 255, 255], [0, 0, 0]], [0.167, [0, 0, 0], [255, 255, 255]], [0.33, [255, 255, 255], [0, 0, 0]], [0.5, [0, 0, 0], [140, 140, 255]], [0.55, [140, 140, 255], [0, 255, 0]], [0.63, [0, 255, 0], [255, 255, 0]], [0.75, [255, 255, 0], [255, 0, 0]], [0.95, [255, 0, 0], [255, 0, 255]]]);
var colormaps = {
greyscale: greyscale_colormap,
default: default_colormap,
stretched: stretched_colormap,
fastie: fastie_colormap
}
function segmented_colormap(segments) {
return function(x) {
var i, result, x0, x1, xstart, y0, y1, _i, _j, _len, _ref, _ref1, _ref2, _ref3;
_ref = [0, 0], y0 = _ref[0], y1 = _ref[1];
_ref1 = [segments[0][0], 1], x0 = _ref1[0], x1 = _ref1[1];
if (x < x0) {
return y0;
}
for (i = _i = 0, _len = segments.length; _i < _len; i = ++_i) {
_ref2 = segments[i], xstart = _ref2[0], y0 = _ref2[1], y1 = _ref2[2];
x0 = xstart;
if (i === segments.length - 1) {
x1 = 1;
break;
}
x1 = segments[i + 1][0];
if ((xstart <= x && x < x1)) {
break;
}
}
result = [];
for (i = _j = 0, _ref3 = y0.length; 0 <= _ref3 ? _j < _ref3 : _j > _ref3; i = 0 <= _ref3 ? ++_j : --_j) {
result[i] = (x - x0) / (x1 - x0) * (y1[i] - y0[i]) + y0[i];
}
return result;
};
};
},{"./PixelManipulation.js":128}]},{},[116]);

3
src/Modules.js
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@@ -7,5 +7,6 @@ module.exports = {
'ndvi-red': require('./modules/NdviRed'),
'do-nothing-pix': require('./modules/DoNothingPix'),
'invert': require('./modules/Invert'),
'crop': require('./modules/Crop')
'crop': require('./modules/Crop'),
'segmented-colormap': require('./modules/SegmentedColormap')
}

7
src/modules/DoNothingPix.js
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@@ -1,11 +1,10 @@
/*
* Display only the green channel
* This module extracts pixels and saves them as it is.
*/
module.exports = function GreenChannel(options) {
module.exports = function DoNothingPix(options) {
options = options || {};
options.title = "Green channel only";
options.description = "Displays only the green channel of an image";
options.title = "Do Nothing with pixels";
var output;
//function setup() {} // optional

79
src/modules/SegmentedColormap.js Normal file
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@@ -0,0 +1,79 @@
module.exports = function SegmentedColormap(options) {
options = options || {};
options.title = "Segmented Colormap";
options.colormap = options.colormap || "default";
if(typeof(options.colormap) == "object")
options.colormap = segmented_colormap(options.colormap);
else options.colormap = colormaps[options.colormap];
var output;
function draw(input,callback) {
this_ = this;
function changePixel(r, g, b, a) {
var ndvi = (b - r) / (r + b);
var normalized = (ndvi + 1) / 2;
var res = options.colormap(normalized);
return [res[0], res[1], res[2], 255];
}
function output(image,datauri,mimetype){
this_.output = {src:datauri,format:mimetype}
}
return require('./PixelManipulation.js')(input, {
output: output,
changePixel: changePixel,
format: input.format,
image: options.image,
callback: callback
});
}
return {
options: options,
draw: draw,
output: output
}
}
var greyscale_colormap = segmented_colormap([[0, [0, 0, 0], [255, 255, 255]], [1, [255, 255, 255], [255, 255, 255]]]);
var default_colormap = segmented_colormap([[0, [0, 0, 255], [38, 195, 195]], [0.5, [0, 150, 0], [255, 255, 0]], [0.75, [255, 255, 0], [255, 50, 50]]]);
var stretched_colormap = segmented_colormap([[0, [0, 0, 255], [0, 0, 255]], [0.1, [0, 0, 255], [38, 195, 195]], [0.5, [0, 150, 0], [255, 255, 0]], [0.7, [255, 255, 0], [255, 50, 50]], [0.9, [255, 50, 50], [255, 50, 50]]]);
var fastie_colormap = segmented_colormap([[0, [255, 255, 255], [0, 0, 0]], [0.167, [0, 0, 0], [255, 255, 255]], [0.33, [255, 255, 255], [0, 0, 0]], [0.5, [0, 0, 0], [140, 140, 255]], [0.55, [140, 140, 255], [0, 255, 0]], [0.63, [0, 255, 0], [255, 255, 0]], [0.75, [255, 255, 0], [255, 0, 0]], [0.95, [255, 0, 0], [255, 0, 255]]]);
var colormaps = {
greyscale: greyscale_colormap,
default: default_colormap,
stretched: stretched_colormap,
fastie: fastie_colormap
}
function segmented_colormap(segments) {
return function(x) {
var i, result, x0, x1, xstart, y0, y1, _i, _j, _len, _ref, _ref1, _ref2, _ref3;
_ref = [0, 0], y0 = _ref[0], y1 = _ref[1];
_ref1 = [segments[0][0], 1], x0 = _ref1[0], x1 = _ref1[1];
if (x < x0) {
return y0;
}
for (i = _i = 0, _len = segments.length; _i < _len; i = ++_i) {
_ref2 = segments[i], xstart = _ref2[0], y0 = _ref2[1], y1 = _ref2[2];
x0 = xstart;
if (i === segments.length - 1) {
x1 = 1;
break;
}
x1 = segments[i + 1][0];
if ((xstart <= x && x < x1)) {
break;
}
}
result = [];
for (i = _j = 0, _ref3 = y0.length; 0 <= _ref3 ? _j < _ref3 : _j > _ref3; i = 0 <= _ref3 ? ++_j : --_j) {
result[i] = (x - x0) / (x1 - x0) * (y1[i] - y0[i]) + y0[i];
}
return result;
};
};