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LauraBevilacqua - 14 Oct 2016
MEETING 1: 14/10/2016
-Reverse grayscale as black dots easier to see on white background
-Pixel Values set from 0-max pixel value of the image
-Bright pixels clearly seen
- Dark Frame at 300s exposure:
- Dark Frame at 300s exposure, maximum value set to the image median multiplied by 2:
-RGB colour space used to define pixel colour so: black=(0,0,0), white=(255,255,255)
-Fill function scans for black pixels and finds adjacent black pixels, fills them red
-Counting begins when black pixel is found
-Function returns number of stars and coordinate of brightest pixel
MEETING 2: 21/10/2016
- Fits files from Aaron converted to monochrome images
- Image of single star
- The maximum pixel value was found to be 65195 from the fits file, as opposed to Aaron's given value of 65535
- Threshold of 100 set so if pixels are above this value they are set as white background, if below they are coloured black (remember reverse grayscale)
- Program locates star and returns count of 1
- Image of 8 stars
- Maximum pixel value found to be 62673, compared to Aaron's 60000
- Threshold set as 20 so that stars don't touch, achieves accurate count of 8
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