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various fixes and changes to SegmentedColormap module (#128)

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This commit is contained in:
Jeffrey Warren
2017-10-04 14:31:43 -04:00
committed by GitHub
parent ca6910017d
commit 829e19e58d
3 changed files with 98 additions and 41 deletions
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68
dist/image-sequencer.js vendored
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@@ -38688,9 +38688,8 @@ module.exports = function SegmentedColormap(options,UI) {
var step = this;
function changePixel(r, g, b, a) {
var ndvi = (b - r) / (r + b);
var normalized = (ndvi + 1) / 2;
var res = require('./SegmentedColormap')(normalized,options);
var combined = (r + g + b) / 3.000;
var res = require('./SegmentedColormap')(combined,options);
return [res[0], res[1], res[2], 255];
}
@@ -38726,18 +38725,28 @@ module.exports = function SegmentedColormap(options,UI) {
},{"../_nomodule/PixelManipulation.js":146,"./SegmentedColormap":144}],144:[function(require,module,exports){
/*
* Accepts a normalized ndvi and returns the new color-mapped pixel
* Accepts a value from 0-255 and returns the new color-mapped pixel
* from a lookup table, which can be specified as an array of [begin, end]
* gradients, where begin and end are represented as [r, g, b] colors. In
* combination, a lookup table which maps values from 0 - 255 smoothly from black to white looks like:
* [
* [0, [0, 0, 0], [255, 255, 255]],
* [1, [255, 255, 255], [255, 255, 255]]
* ]
*
* Adapted from bgamari's work in Infragram: https://github.com/p-v-o-s/infragram-js/commit/346c97576a07b71a55671d17e0153b7df74e803b
*/
module.exports = function SegmentedColormap(normalized,options) {
options.colormap = options.colormap || "default";
module.exports = function SegmentedColormap(value, options) {
options.colormap = options.colormap || colormaps.default;
// if a lookup table is provided as an array:
if(typeof(options.colormap) == "object")
colormapFunction = segmented_colormap(options.colormap);
// if a stored colormap is named with a string like "fastie":
else if(colormaps.hasOwnProperty(options.colormap))
colormapFunction = colormaps[options.colormap];
else colormapFunction = colormaps.default;
return colormapFunction(normalized);
return colormapFunction(value / 255.00);
}
function segmented_colormap(segments) {
@@ -38768,19 +38777,38 @@ function segmented_colormap(segments) {
};
};
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
greyscale: segmented_colormap([
[0, [0, 0, 0], [255, 255, 255] ],
[1, [255, 255, 255], [255, 255, 255] ]
]),
default: segmented_colormap([
[0, [0, 0, 255], [0, 255, 255] ],
[0.33, [0, 255, 255], [255, 255, 0] ],
[0.66, [255, 255, 0], [255, 0, 0] ]
]),
ndvi: 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] ]
]),
stretched: 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] ]
]),
fastie: 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] ]
])
}
},{}],145:[function(require,module,exports){

7
src/modules/SegmentedColormap/Module.js
View File

@@ -15,16 +15,15 @@ module.exports = function SegmentedColormap(options,UI) {
var step = this;
function changePixel(r, g, b, a) {
var ndvi = (b - r) / (r + b);
var normalized = (ndvi + 1) / 2;
var res = require('./SegmentedColormap')(normalized,options);
var combined = (r + g + b) / 3.000;
var res = require('./SegmentedColormap')(combined, options);
return [res[0], res[1], res[2], 255];
}
function output(image,datauri,mimetype){
// This output is accessible by Image Sequencer
step.output = {src:datauri,format:mimetype};
step.output = { src: datauri, format: mimetype };
// This output is accessible by the UI
options.step.output = datauri;

64
src/modules/SegmentedColormap/SegmentedColormap.js
View File

@@ -1,16 +1,26 @@
/*
* Accepts a normalized ndvi and returns the new color-mapped pixel
* Accepts a value from 0-255 and returns the new color-mapped pixel
* from a lookup table, which can be specified as an array of [begin, end]
* gradients, where begin and end are represented as [r, g, b] colors. In
* combination, a lookup table which maps values from 0 - 255 smoothly from black to white looks like:
* [
* [0, [0, 0, 0], [255, 255, 255]],
* [1, [255, 255, 255], [255, 255, 255]]
* ]
*
* Adapted from bgamari's work in Infragram: https://github.com/p-v-o-s/infragram-js/commit/346c97576a07b71a55671d17e0153b7df74e803b
*/
module.exports = function SegmentedColormap(normalized,options) {
options.colormap = options.colormap || "default";
module.exports = function SegmentedColormap(value, options) {
options.colormap = options.colormap || colormaps.default;
// if a lookup table is provided as an array:
if(typeof(options.colormap) == "object")
colormapFunction = segmented_colormap(options.colormap);
// if a stored colormap is named with a string like "fastie":
else if(colormaps.hasOwnProperty(options.colormap))
colormapFunction = colormaps[options.colormap];
else colormapFunction = colormaps.default;
return colormapFunction(normalized);
return colormapFunction(value / 255.00);
}
function segmented_colormap(segments) {
@@ -41,17 +51,37 @@ function segmented_colormap(segments) {
};
};
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
greyscale: segmented_colormap([
[0, [0, 0, 0], [255, 255, 255] ],
[1, [255, 255, 255], [255, 255, 255] ]
]),
default: segmented_colormap([
[0, [0, 0, 255], [0, 255, 0] ],
[0.25, [0, 255, 0], [255, 255, 0] ],
[0.50, [0, 255, 255], [255, 255, 0] ],
[0.75, [255, 255, 0], [255, 0, 0] ]
]),
ndvi: 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] ]
]),
stretched: 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] ]
]),
fastie: 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] ]
])
}