G+_Aditya Ghosh Posted May 12, 2014 Share Posted May 12, 2014 This image from SOHO Satellite of NASA contains many small white colored dots (stars) all around the picture. I want to make a program in Python which can simply tell me all dots information (like RGB and position in terms of height and width). How can this be done sir? Link to comment Share on other sites More sharing options...
G+_Aditya Ghosh Posted May 12, 2014 Author Share Posted May 12, 2014 NASA is giving out these photographs for free because all dots are not stars, few or many are comets. These images can be freely downloaded and analysed. I want to make an application in Python which can somehow read these images and show all the bright dots in some kind of highlighted way/ using coordinate information. Link to comment Share on other sites More sharing options...
G+_Lee Crocker Posted May 12, 2014 Share Posted May 12, 2014 The Pillow library should be able to decode the images for you into something you can manipulate. What do you think you'll be able to do with this info? Link to comment Share on other sites More sharing options...
G+_Aditya Ghosh Posted May 13, 2014 Author Share Posted May 13, 2014 thank you sir for ur reply.......i want tostore these values and see for the changes over time. Stars never change, if there are moving dots, then they may be comets. NASA uses this technique to find comets, people all around the world are also doing it, i want to make an application that can do it... Link to comment Share on other sites More sharing options...
G+_Lee Crocker Posted May 13, 2014 Share Posted May 13, 2014 But these are images of the sun, shouldn't the stars behind be changing constantly? Link to comment Share on other sites More sharing options...
G+_Aditya Ghosh Posted May 13, 2014 Author Share Posted May 13, 2014 yes they change, but these images are available in an interval of 5 minutes [LINK: http://soho.esac.esa.int/data/realtime/c3/512/] and at this fast interval they dont change. But if a comet will be passing by, their changes will be very clear. SInce comets are inside our solar system and stars are billions of miles away from us. Link to comment Share on other sites More sharing options...
G+_Aditya Ghosh Posted May 13, 2014 Author Share Posted May 13, 2014 my motive of using this software is as a comet hunting device. My plans were to record all dots for two or more consecutive photos and match thepixels which have shifted their position. I did see many people who have posted their results, and many of them are also doing it MANUALLY!!!..like using MS PAINT to find the spots and then writing them on a piece of paper and sending the same to NASA. Hundreds of comets have been discovered in this manner by comet hunters all around the world..... Link to comment Share on other sites More sharing options...
G+_Aditya Ghosh Posted May 13, 2014 Author Share Posted May 13, 2014 I have placed another thread in which i have tried to sketch my rough idea. Please look into it. Link to comment Share on other sites More sharing options...
G+_L I Posted May 14, 2014 Share Posted May 14, 2014 This might help http://seethesource.wordpress.com/2013/08/27/extracting-pixel-values-of-an-image-in-python/ Link to comment Share on other sites More sharing options...
G+_L I Posted May 14, 2014 Share Posted May 14, 2014 Ahh I guess this is what's called the Pillow library? Link to comment Share on other sites More sharing options...
G+_Lee Crocker Posted May 14, 2014 Share Posted May 14, 2014 Pillow is a more actively developed fork of PIL. Link to comment Share on other sites More sharing options...
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