Jananas07 Posted December 31, 2020 Share Posted December 31, 2020 Hi! So Ive found some pictures from an arxiv report in a database which I need for my project and converted them to fits files (The picture on the left). The one that was used in the arxiv report (picture on right) is a zoomed in picture of a galaxy in that picture, where its clearly visible. However when I try zooming in on the exakt coordinates of the galaxy in the fits image, its just plain black. I want the picture "raw", that's why I saved it as fits and not their pdf picture from report. Someone suggested first stretching the image for a more detailed image but some filters had to be used though... the only thing I can find on the tables of the images is that filter F160W was used. I have no idea how to move forward now, completely stuck. Would appreciate some help! Link to comment Share on other sites More sharing options...
JamesF Posted December 31, 2020 Share Posted December 31, 2020 It looks to me as though in converting the image to FITS you have also changed it from greyscale to a depth of one bit per pixel (so each pixel is either white or black rather than a shade of grey) and inverted the result. The various greys making up the galaxy are therefore now all black, hence what you're seeing where the galaxy should be. James Link to comment Share on other sites More sharing options...
Jananas07 Posted December 31, 2020 Author Share Posted December 31, 2020 Ah that makes sense... thank you! Link to comment Share on other sites More sharing options...
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