Hfrhyu

I have a image collection which holds multiple images of the same area. I can apply mask individually to those images but how do I apply a mask to all the images in the collection. Say the mask i have to apply is to filter out all the pixels with value more than a given value. Since i have multiple images for the same location, I want to 'and' the logic so that i get a single image with pixels displayed which satisfy the condition for all the images. Here is some code i wrote which works for fine when i have single image:

 Map.setOptions('SATELLITE')
 var image = ee.ImageCollection("imagesForIrvineCalifornia");


 var min = image.aggregate_min('min');
 var max = image.aggregate_max('max');


 var VIS_OPTIONS = 
 'b1': 
 description: 'b1' +
 'b1 descripion',
 visParams1: min:min.getInfo(), max:max.getInfo(), palette: ['DCF5E9', 'BDDEC9', '9DC7AA', '82B38E','689E75', '4E8A5B', '387847'], bands: ['b1']
 
 ;

 var maskingFunc = function(val)
 return function(i)
 var band = i.select('b1');
 var mask = band.lte(val);
 return i.updateMask(mask);
 
 

 var maskedImage = image;
 var cutoffVal=3000 ;
 maskedImage = image.map(maskingFunc(cutoffVal));

 Map.addLayer(maskedImage.select('b1'), VIS_OPTIONS['b1'].visParams1, '(b1)', true);
 Map.centerObject(Map.layers().get(0).get('eeObject'));

As I don't have your image collection, I tested it with a fantasy collection made of randomly generated images. Worked for me.

EDIT: This code only works when images inside the collection are overlapped.

Map.setOptions('SATELLITE')
var image = ee.ImageCollection("imagesForIrvineCalifornia");

var min = image.aggregate_min('min');
var max = image.aggregate_max('max');


var VIS_OPTIONS = 
 'b1': 
 description: 'b1' +
 'b1 descripion',
 visParams1: min:min.getInfo(), max:max.getInfo(), palette: ['DCF5E9', 'BDDEC9', '9DC7AA', '82B38E','689E75', '4E8A5B', '387847'], bands: ['b1']
 
;

var maskingFunc = function(collection, val, band)
 // convert col to list
 var collist = collection.toList(collection.size())
 // get first img of collection and compute condition
 var ini = ee.Image(collist.get(0)).lte(val)
 // get collection without first image
 var rest = ee.ImageCollection(collist.slice(1))

 // function to iterate over the 'rest' collection to 'and' logic
 var wrap = function(i, first)
 var f = ee.Image(first).select(band)
 var image = i.select(band);
 var mask = image.lte(val);
 return mask.and(f)
 

 // iterate over the collection and return a single image
 return ee.Image(collection.iterate(wrap, ini))


var cutoffVal = 3000;
var maskedImage = maskingFunc(image, cutoffVal, 'b1');

Map.addLayer(maskedImage.select('b1'), min:0, max:1, '(b1)', true);
Map.centerObject(Map.layers().get(0).get('eeObject'));