थर्मल इमेजिंग पैलेट

Question

थर्मल इमेजिंग के शुरुआती दिनों के बाद से, अवरक्त कैमरों अक्सर एक विशिष्ट पैलेट कि नीले, मैजेंटा, नारंगी, उज्ज्वल सफेद के लिए पीले रंग के माध्यम से काला से चलाता है का उपयोग करें। इस पैलेट अक्सर आयरन, या Ironbow कहा जाता है।

यहाँ एक छवि एक इंतजार कर रहे अवरक्त कैमरा (: विकिपीडिया स्रोत) के साथ लिया का एक विशिष्ट झूठे रंग दृश्य है।

Lcamtuf द्वारा "Termografia kot" - एक ठेठ झूठे रंग अवरक्त

एक विशेष अवरक्त कल्पना मंच पर मैं एक असतत पैलेट कि के करीब हो रहा है के साथ 2005 से एक पोस्ट पाया है कि मैं क्या मैं देख रहा हूँ

अज्ञात मूल

का एक असतत FLIR पैलेट हालांकि इंद्रधनुष पैलेट के साथ के रूप में यह एक संक्षिप्त विश्लेषणात्मक अभिव्यक्ति है कि पैलेट को परिभाषित करता है के लिए अच्छा होगा।

जो लोग gnuplot का इस्तेमाल किया है इस पैलेट डिफ़ॉल्ट PM3D पैलेट के रूप में परिचित लग सकता है करने के लिए काले नीले मैजंटा-नारंगी पीले चलाता है।

gnuplot PM3D पैलेट

इस पैलेट लेकिन यह काफी नहीं है कि अन्य पैलेट दिखता है एक संक्षिप्त परिभाषा

r = Math.round(255*Math.sqrt(x)); 
g = Math.round(255*Math.pow(x,3)); 
b = Math.round(255*(Math.sin(2 * Math.PI * x)>=0? 
        Math.sin(2 * Math.PI * x) : 0)); 

है। मेरे स्वाद के लिए थोड़ा भूरा। FLIR कैमरों में उपयोग किए जाने वाले पैलेट के लिए उत्पत्ति या विश्लेषणात्मक अभिव्यक्ति पर कोई अतिरिक्त जानकारी मददगार होगी।

मैं एक JSFiddle बनाया है अलग पट्टियाँ साथ खेलने के लिए।

Answer 1

ये पट्टियाँ ऐच्छिक हैं और मुख्य रूप से की छवि के प्रकार के आधार पर इसके विपरीत सुधार करने के लिए प्रयोग किया जाता है आप हो रहा है मूल्य कस्टम कस्टम सेट के लिए कर सकते हैं।

चूंकि आईआर किसी भी रंग को कैप्चर नहीं करता है (क्योंकि यह रंग सीमा से बाहर है) लौटा हुआ ल्यूमिनेंस वैल्यू केवल किनारों और आकृतियों के संबंध में सबसे अच्छा विपरीत बनाता है, जो मैप किया जाता है।

लौह पैलेट में 5-7 महत्वपूर्ण रंग होते हैं जिन्हें तब इंटरपोलेट किया जाता है (लाल पीले और मैजेंटा के बीच मिश्रण को ठीक से ट्यून किया जा सकता है)।

var ctx = document.querySelector("canvas").getContext("2d"); 
 
var gr = ctx.createLinearGradient(0, 0, 600, 0); 
 
var keys = ["white", "gold", "#c07", "#20008c", "black"]; 
 

 
// add color stops to gradient: 
 
for(var i = 0, key; key = keys[i]; i++) { 
 
    gr.addColorStop(i/(keys.length-1), key); 
 
} 
 

 
ctx.fillStyle = gr; 
 
ctx.fillRect(0, 0, 600, 20);

<canvas width=600></canvas>

Answer 2

यह है कि आप रंग पैलेट के लिए एक सूत्र मिल जाएगा संभावना नहीं है। तो आपको एक रंग सरणी का उपयोग करना चाहिए।

यहाँ (here से) FLIR के लौह पैलेट, और एक सरणी में अपना रंग है:

var iron_palette = ["#00000a","#000014","#00001e","#000025","#00002a","#00002e","#000032","#000036","#00003a","#00003e","#000042","#000046","#00004a","#00004f","#000052","#010055","#010057","#020059","#02005c","#03005e","#040061","#040063","#050065","#060067","#070069","#08006b","#09006e","#0a0070","#0b0073","#0c0074","#0d0075","#0d0076","#0e0077","#100078","#120079","#13007b","#15007c","#17007d","#19007e","#1b0080","#1c0081","#1e0083","#200084","#220085","#240086","#260087","#280089","#2a0089","#2c008a","#2e008b","#30008c","#32008d","#34008e","#36008e","#38008f","#390090","#3b0091","#3c0092","#3e0093","#3f0093","#410094","#420095","#440095","#450096","#470096","#490096","#4a0096","#4c0097","#4e0097","#4f0097","#510097","#520098","#540098","#560098","#580099","#5a0099","#5c0099","#5d009a","#5f009a","#61009b","#63009b","#64009b","#66009b","#68009b","#6a009b","#6c009c","#6d009c","#6f009c","#70009c","#71009d","#73009d","#75009d","#77009d","#78009d","#7a009d","#7c009d","#7e009d","#7f009d","#81009d","#83009d","#84009d","#86009d","#87009d","#89009d","#8a009d","#8b009d","#8d009d","#8f009c","#91009c","#93009c","#95009c","#96009b","#98009b","#99009b","#9b009b","#9c009b","#9d009b","#9f009b","#a0009b","#a2009b","#a3009b","#a4009b","#a6009a","#a7009a","#a8009a","#a90099","#aa0099","#ab0099","#ad0099","#ae0198","#af0198","#b00198","#b00198","#b10197","#b20197","#b30196","#b40296","#b50295","#b60295","#b70395","#b80395","#b90495","#ba0495","#ba0494","#bb0593","#bc0593","#bd0593","#be0692","#bf0692","#bf0692","#c00791","#c00791","#c10890","#c10990","#c20a8f","#c30a8e","#c30b8e","#c40c8d","#c50c8c","#c60d8b","#c60e8a","#c70f89","#c81088","#c91187","#ca1286","#ca1385","#cb1385","#cb1484","#cc1582","#cd1681","#ce1780","#ce187e","#cf187c","#cf197b","#d01a79","#d11b78","#d11c76","#d21c75","#d21d74","#d31e72","#d32071","#d4216f","#d4226e","#d5236b","#d52469","#d62567","#d72665","#d82764","#d82862","#d92a60","#da2b5e","#da2c5c","#db2e5a","#db2f57","#dc2f54","#dd3051","#dd314e","#de324a","#de3347","#df3444","#df3541","#df363d","#e0373a","#e03837","#e03933","#e13a30","#e23b2d","#e23c2a","#e33d26","#e33e23","#e43f20","#e4411d","#e4421c","#e5431b","#e54419","#e54518","#e64616","#e74715","#e74814","#e74913","#e84a12","#e84c10","#e84c0f","#e94d0e","#e94d0d","#ea4e0c","#ea4f0c","#eb500b","#eb510a","#eb520a","#eb5309","#ec5409","#ec5608","#ec5708","#ec5808","#ed5907","#ed5a07","#ed5b06","#ee5c06","#ee5c05","#ee5d05","#ee5e05","#ef5f04","#ef6004","#ef6104","#ef6204","#f06303","#f06403","#f06503","#f16603","#f16603","#f16703","#f16803","#f16902","#f16a02","#f16b02","#f16b02","#f26c01","#f26d01","#f26e01","#f36f01","#f37001","#f37101","#f37201","#f47300","#f47400","#f47500","#f47600","#f47700","#f47800","#f47a00","#f57b00","#f57c00","#f57e00","#f57f00","#f68000","#f68100","#f68200","#f78300","#f78400","#f78500","#f78600","#f88700","#f88800","#f88800","#f88900","#f88a00","#f88b00","#f88c00","#f98d00","#f98d00","#f98e00","#f98f00","#f99000","#f99100","#f99200","#f99300","#fa9400","#fa9500","#fa9600","#fb9800","#fb9900","#fb9a00","#fb9c00","#fc9d00","#fc9f00","#fca000","#fca100","#fda200","#fda300","#fda400","#fda600","#fda700","#fda800","#fdaa00","#fdab00","#fdac00","#fdad00","#fdae00","#feaf00","#feb000","#feb100","#feb200","#feb300","#feb400","#feb500","#feb600","#feb800","#feb900","#feb900","#feba00","#febb00","#febc00","#febd00","#febe00","#fec000","#fec100","#fec200","#fec300","#fec400","#fec500","#fec600","#fec700","#fec800","#fec901","#feca01","#feca01","#fecb01","#fecc02","#fecd02","#fece03","#fecf04","#fecf04","#fed005","#fed106","#fed308","#fed409","#fed50a","#fed60a","#fed70b","#fed80c","#fed90d","#ffda0e","#ffda0e","#ffdb10","#ffdc12","#ffdc14","#ffdd16","#ffde19","#ffde1b","#ffdf1e","#ffe020","#ffe122","#ffe224","#ffe226","#ffe328","#ffe42b","#ffe42e","#ffe531","#ffe635","#ffe638","#ffe73c","#ffe83f","#ffe943","#ffea46","#ffeb49","#ffeb4d","#ffec50","#ffed54","#ffee57","#ffee5b","#ffee5f","#ffef63","#ffef67","#fff06a","#fff06e","#fff172","#fff177","#fff17b","#fff280","#fff285","#fff28a","#fff38e","#fff492","#fff496","#fff49a","#fff59e","#fff5a2","#fff5a6","#fff6aa","#fff6af","#fff7b3","#fff7b6","#fff8ba","#fff8bd","#fff8c1","#fff8c4","#fff9c7","#fff9ca","#fff9cd","#fffad1","#fffad4","#fffbd8","#fffcdb","#fffcdf","#fffde2","#fffde5","#fffde8","#fffeeb","#fffeee","#fffef1","#fffef4","#fffff6"];