是否可以在图像和星座之间建立关联? [英] Is it possible to make a correlation between an image and a constellation?
问题描述
我要做的是在手机拍摄的图像和星座之间建立关系.假设我已经从 NASA 获得了每个星座的完整坐标，并且我可以将一些指定的对象识别为图像上的坐标点.我怎样才能在这些不同的坐标之间建立关系?如何指出图像和任何星座之间的几何相似性?什么样的算法可以帮助解决这种情况?
What I'm trying to do is to create a relation between an image which has been taken by a mobile phone and a constellation. Let's suppose I've been given the whole coordinates of each constellations from NASA and I can recognize some specified objects as coordinate points on the image. How can I make a relation between those different coordinates? How can I point geometrical similarities between image and any constellation? What kind of an algorithm could help the situation?
推荐答案
我认为你最好比较星星的位置、亮度、颜色
轮廓图和星座星并不像你想象的那么相似.不知道您要使用哪种手机，但人眼可见的星星和照片上的星星不会一样.您将不得不考虑由于不同的光敏感度而导致的数据丢失，由于室外条件(云、水分、温度、灰尘、光污染)，因此照片上通常看不到许多星星
The outline image and constellation stars are not that similar as you think. Don't know what kind of phone you want to use but the stars visible by human eye and on the photo will not be the same. You will have to consider the loss of data due to different light sensitivity, due to outdoor conditions (clouds,moisture,temperature,dust,light polution) so often many stars will not be visible on the photo
因此为每个星座创建恒星列表
您将需要位置、颜色(BV 指数)、幅度
you will need position,color (BV index),magnitude
比较
从照片中检测所有/明亮的星星并按亮度降序对它们进行排序.与每个星座的存储数据相关(也已排序)并选择具有足够高相似性的星座.如果您想要更多关于旋转的不变数据，请缩放然后比较亮星之间的距离而不是位置
detect all/bright stars from photo and sort them by brightness descending. Correlate with stored data per each constellation (also sorted) and choose constellation with high enough similarity. If you want more invariant data on rotation,scale then compare distances between bright stars instead of positions
现在你知道星座了
所以为它添加图像...
so add image for it ...
[注释]
这里有一些相关链接:
- 相关系数
- BV 到 RGB 转换
- 可以使用大气散射让 BV 颜色更逼真
- correlation coefficient
- BV to RGB conversion
- can use atmospheric scattering to make the BV color more realistic
这是真实的(带有标记的星星)
this is real (with marked the stars)
和渲染图像进行比较
真实图像由相机和三脚架拍摄.根据视觉条件，您通常可以预期会从星座中丢失几颗恒星.在手机上，它通常要糟糕得多.
real image was taken by camera and tripod. You can often expect missing few stars from constellation according to visual conditions. On phones it is usually much much worse.
这是我十年前创建的星座数据...
Here mine Constellations data I created a decade ago ...
// constellations (-2 means MoveTo, >=0 means LineTo BSC star ID)
sadd("Ursa minor" ,420,6777,6311,5893,5553,5725,6106,5893);
sadd("Andromeda" ,14,333,600,333,265,222);
sadd("Triangulum" ,540,660,618,540);
sadd("Camelopardalis" ,1537,1598); //neni cele !!!
sadd("Cassiopeia" ,538,399,260,165,20);
sadd("Perseus" ,1198,1215,1117,1013,911,1013,932,875,917,943,932);
sadd("Auriga" ,2089,2082,1703,1600,1587,1572,-2,1636,1600,1607);
sadd("Lynx" ,3695,3680,3570,3267);
sadd("Leo minor" ,4090,4237); //neni cele !!!
sadd("Ursa major" ,5181,5045,4895,4650,4291,4285,4544,4650,4291,3747,3315,-2,4285,3765,3560,3765,3585,-2,4544,4508,4325,4059,4325,4023);
sadd("Canes venatici" ,4905,4775); //neni cele !!!
sadd("Hercules" ,6683,6474,6407,6313,6202,6210,6407,6210,6158,6082,6013,5972,-2,6085,6138,6202,6313,6399,6514,6611,6691,6767);
sadd("Draco" ,6676,6693,6524,6543,6676,7297,7568,6915,6385,6122,5976,5734,5281,4777,4424);
sadd("Lyra" ,6989,7044,7127,7166,7094,7044);
sadd("Cygnus" ,7405,7465,7601,7782,7910,-2,8101,7935,7782,7515,7407,7315);
sadd("Cepheus" ,7836,7943,8148,8556,8450,-2,8479,8556,8679,8959,8679,8224,8148);
sadd("Lacerta" ,8598,8570,8523,8570,8526,8557,8508,8564,8470,8483,-2,8564,8617,8557);
sadd("Cetus" ,184,330,73,330,398,535,505,581,-2,535,677,735,775,800,907,800,750,714,809,892);
sadd("Pisces" ,348,379,356,347,433,506,592,545,485,430,290,220,9057,8954,8901,8863,8758,8837,8896,8969,8954,8969,9052,2);
sadd("Eridanus" ,1661,1515,1458,1320,1476,1491,-2,1320,1293,1226,1131,1079,984,870,915,999,1083,1168,1235,1459,1388,1342,1185,894,790,717,670,562,468);
sadd("Fornax" ,959,837); //neni cele !!!
sadd("Columba" ,2290,2100,2034,1950,1856);
sadd("Taurus" ,2089,1404,1384,1368,1341,1234,1341,1407,1452,1651,1904,-2,1452,1404,1251,1160);
sadd("Lepus" ,2029,1859,1697,1751,-2,1700,1697,1649,1824,1859,1977);
sadd("Orion" ,1943,1897,1846,1730,1708,1998,1943,2055,1870,1785,1846);
sadd("Canis major" ,2649,2588,2484,2288,2484,2645,2685,2638,2610,2276,-2,2819,2758,2685);
sadd("Gemini" ,2982,2965,2883,2844,2689,2466,2280,2337,2415,2642,2769,2977,2982);
sadd("Monoceros" ,3180,2962,2706,2350,2221,-2,2706,2498,2293);
sadd("Cancer" ,3467,3441,3453,3563,3453,3311,3241);
sadd("Canis minor" ,2935,2837); //neni cele !!!
sadd("Hydra" ,3538,3474,3402,3410,3446,3538,3656,3777,3738,3893,3960,3984,4084,4222,4307,4440,4542,4948,5010,5070,5277,-2,3738,3699,3632,3451,3306,3451,3476);
sadd("Pyxis" ,3430,3460,3509);
sadd("Sextans" ,4183,3971,3899); //neni cele !!!
sadd("Antlia" ,4094,4094); //neni cele !!!
sadd("Virgo" ,4507,4530,4679,4816,4900,4922,-2,4816,4953,5046,4953,5097);
sadd("Corvus" ,4776,4620,4652,4747,4776);
sadd("Crater" ,4395,4372,4277,4333,4395);
sadd("Bootes" ,5225,5330,5496,5671,5592,5425,5419,5330);
sadd("Corona borealis" ,5937,5879,5839,5783,5737,5768);
sadd("Libra" ,5593,5521,5675,5777);
sadd("Serpens caput" ,5923,5857,5869,5857,5779,5844,5882,6046,6065,6165,6367,6442);
sadd("Serpens cauda" ,6367,6549,6686,6722,6857,7130);
sadd("Ophiuchus" ,6686,6617,6591,6544,6396,6289,6139,6046);
sadd("Scorpius" ,6515,6568,6603,6546,6369,6261,6237,6231,6155,6124,6074,5934,-2,5943,6074,5975);
sadd("Scutum" ,6961,7051);
sadd("Sagittarius" ,6800,6901,7027,7109,7204,7251,7204,7138,-2,7181,7221,7109,-2,6901,6847,6734,6847,6867,6820);
sadd("Vulpecula" ,7392,7643);
sadd("Sagitta" ,7475,7523,7466,7523,7621);
sadd("Delphinus" ,7838,7868,7914,7934,7892,7868);
sadd("Aquila" ,7512,7543,7222,7364,7556,7696,7588,7543,7364,7223);
sadd("Capricrnus" ,7740,7762,7808,7922,7966,8066,8190,8199,8246,8307,8264,8153,8061,7762);
sadd("Piscis austrinus" ,8613,8713,8705,8680,8561);
sadd("Pegasus" ,8635,8760,8766,8650,8619,8435,8293,8619,-2,8300,8415,8652,8669,8760,14,38,8766);
sadd("Equuleus" ,8117,8109,8083);
sadd("Aquarius" ,7936,8218,8399,8503,8544,8582,8683,8664,8694,8797);
sadd("Hydrus" ,587,1203,95);
sadd("Phoenix" ,96,318,436,425,96);
sadd("Reticulum" ,1331,1350,1242,1170,1331);
sadd("Dorado" ,1916,1460,1333);
sadd("Pictor" ,2542,2036,2014);
sadd("Volans" ,3606,3339,2795,2728,3016);
sadd("Carina" ,2320,3299,3689,3881,3675,4027,4189,4130,4040,3689);
sadd("Puppis" ,3177,3094,3037,2941,2779,2765,3157,2870,2545,2445,2765);
sadd("Vela" ,3625,3199,3477,3724,3625,3477,-2,3724,3793);
sadd("Chamaeleon" ,3310,4164,4224);
sadd("Musca" ,4510,4661,4788,4763,4913,4834,4788);
sadd("Crux" ,4843,4646,-2,4753,4721);
sadd("Centaurus" ,4611,4809,5122,5257,5449,-2,5122,5221,5183,5180,5018,-2,5180,5278,5430,5566);
sadd("Circinus" ,5660,5453,5694);
sadd("Triangulum Australe",6207,5661,5761,5887,6207);
sadd("Lupus" ,5938,5766,5685,5695,-2,5459,5561,5685,5766,5698,5639);
sadd("Norma" ,6062,6105);
sadd("Ara" ,6499,6450,6275,6285,-2,6219,6275,6450,6451,6489);
sadd("Telescopium" ,6893,6885);
sadd("Corona Australis" ,7140,7214,7241,7246,7229,7176);
sadd("Apus" ,5460,6011,6092,6153);
sadd("Octans" ,5329,8615,8240);
sadd("Tucana" ,124,8833,8487);
sadd("Grus" ,8660,8621,8541,8410,-2,8541,8471,8396,8338);
sadd("Pavo" ,7776,7899,7651,7062,6570,6970,7576,7899);
sadd("Indus" ,7776,7972,7906,7855);
作为您的明星数据库，您可以轻松地使用 BSC(耶鲁大学明星目录).上面的星座只是连接来自 BSC 的恒星形成图像的折线.有很多星座表示，所以如果你不喜欢一些，可以根据自己的喜好重写它们.neni cele !!! 注释表示未完成.
As your star database you can easily use BSC (Yale Bright Stars Catalog). Constellations above are just poly-lines connecting stars from BSC to form the image. There are many constellation representations so if you do not like some rewrite them to your liking. neni cele !!! comment means it is unfinished.
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