July 2016
Beginner to intermediate
462 pages
9h 14m
English
Content preview from Python Data Analysis CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Searching for bright stars
Many stars are visible at night, even without using a telescope or any other optical device. Stars are, in general, larger than planet Earth, but in certain stages of their evolution, they can be smaller. Due to the large distance, they appear as tiny dots. Often, these dots consist of two (a binary system) or more stars. Not all stars emit visible light and not all starlight can reach us.
There are many approaches that we can take to find bright stars in a starry sky image. In this recipe, we will look for local maximums of brightness, which are also above a threshold. To determine brightness, we will convert the image to the HSV color space. In this color space, the three dimensions are hue, saturation, and value (brightness). ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.