Day/Night/Morning checker

gistfile1.js

var fs = require('fs')
  , gm = require('gm');

var threshold = {
	"night": 
		{ 
			"from": 0, 
			"to": 	10000
		},
	"morning": 
		{
			"from": 10000,
			"to": 	50000
		},
	"day": 
		{
			"from": 50000, 
			"to": 	500000
		}
}

process.argv.forEach(function (val, index, array) {
	if(index>1){
		console.log('checking day or night for: ' + val);
		checkDayOrNight(val);
	}
});

function checkDayOrNight(pic){
	gm(pic).color(function (err, c) {
		if(!err){
			for (var key in threshold) {
			   var obj = threshold[key];
			   if(c < obj["to"] && c > obj["from"]){
			   	console.log(pic + "= " + key);
			   }
			}
		}else{
			console.log("ERROR: "+err);
		}
	});
}


/* 

NIGHT
------

{ Red:
   { Minimum: '0.00 (0.0000)',
     Maximum: '99.00 (0.3882)',
     Mean: '3.02 (0.0119)',
     'Standard Deviation': '2.40 (0.0094)' },
  Green:
   { Minimum: '0.00 (0.0000)',
     Maximum: '73.00 (0.2863)',
     Mean: '0.96 (0.0038)',
     'Standard Deviation': '0.97 (0.0038)' },
  Blue:
   { Minimum: '0.00 (0.0000)',
     Maximum: '56.00 (0.2196)',
     Mean: '1.63 (0.0064)',
     'Standard Deviation': '1.66 (0.0065)' } }



MORNING
-------

{ Red:
   { Minimum: '0.00 (0.0000)',
     Maximum: '230.00 (0.9020)',
     Mean: '16.02 (0.0628)',
     'Standard Deviation': '21.51 (0.0843)' },
  Green:
   { Minimum: '0.00 (0.0000)',
     Maximum: '255.00 (1.0000)',
     Mean: '17.14 (0.0672)',
     'Standard Deviation': '20.96 (0.0822)' },
  Blue:
   { Minimum: '0.00 (0.0000)',
     Maximum: '255.00 (1.0000)',
     Mean: '12.09 (0.0474)',
     'Standard Deviation': '20.76 (0.0814)' } }


DAY
----

{ Red:
   { Minimum: '0.00 (0.0000)',
     Maximum: '255.00 (1.0000)',
     Mean: '73.82 (0.2895)',
     'Standard Deviation': '53.82 (0.2111)' },
  Green:
   { Minimum: '0.00 (0.0000)',
     Maximum: '255.00 (1.0000)',
     Mean: '70.48 (0.2764)',
     'Standard Deviation': '54.61 (0.2142)' },
  Blue:
   { Minimum: '0.00 (0.0000)',
     Maximum: '255.00 (1.0000)',
     Mean: '65.77 (0.2579)',
     'Standard Deviation': '53.91 (0.2114)' } }

*/