如何在涂料应用的填充操作的工作？ [英] How does the fill operation work in paint applications?

问题描述

所有的绘图程序，独立于它们是如何简单或复杂的是，配备了填充工具。这基本上取代的封闭区域与另一种颜色的颜色。我知道，有不同的API来做到这一点，但我感兴趣的算法研究。什么是一个高效的算法来实现这个工具？

All paint programs, independent of how simple or complex they are, come with a fill tool. This basically replaces the color of a closed region with another color. I know that there are different APIs to do this, but I am interested in the algorithm. What would be an efficient algorithm to implement this tool?

一对夫妇的事情，我能想到的快速如下：

A couple of things I can think of quickly are:

1. 在转换图像转换成二进制的地图，其中的彩色像素被替换为 1 和所有其他颜色 0 。
2. 找到各地要更改，使得所有像素内的1，所有的相邻像素是0点的封闭区。

1. Convert image into a binary map, where pixels in the color to be replaced are 1 and all other colors are 0.
2. Find a closed region around the point you want to change such that all the pixels inside are 1 and all the neighbouring pixels are 0.

样品图像

推荐答案

许多实现都是因为一个递归征服和除法算法。如果你做一个快速谷歌的洪水填充算法，你会发现很多资源，包括的话题

Many implementations are done as a recursive conquer and divide algorithm. If you do a quick google for "flood fill algorithm" you will find plenty of resources including the excellent wikipedia page on the topic.

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