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确定Java.awt.Rectangle是否包含Java.awt.Color

[英]Determining if a Java.awt.Rectangle contains a Java.awt.Color

原文 2016-07-21 17:32:37 3 1 java

I was wondering how I would determine if a Java.awt.Rectangle contains a pixel that is a specific Java.awt.Color. 我想知道如何确定Java.awt.Rectangle是否包含特定Java.awt.Color的像素。 I've been searching all over but I cannot find any information on this or if it's even possible. 我一直在搜索，但是找不到任何信息，甚至可能。

So I was wondering how to determine if a Rectangle contains aa pixel with a specific Color or if a specific colored pixel is inside a defined Rectangle. 所以我想知道如何确定一个Rectangle是否包含具有特定颜色的像素，或者是否在定义的Rectangle中包含特定颜色的像素。

Example: The left image is a black rectangle. 示例：左侧图像是黑色矩形。 Lets say I have a defined Java.awt.Color that is red. 可以说我有一个红色定义的Java.awt.Color。 I want to determine if that rectangle contains a pixel that is that color. 我想确定该矩形是否包含该颜色的像素。

1 个解决方案

If you need to find out if some pixel on a Graphics was painted in this color, you can only discover it if the Graphics was created over a BufferedImage. 如果您需要确定图形上的某些像素是否以此颜色绘制，则只有在图形是在BufferedImage上创建的情况下才能发现它。 So you could run the same code that draws on screen, say call a Component's paint(Graphics) method, passing to it the result of BufferedImage.createGraphics() call. 因此，您可以运行在屏幕上绘制的相同代码，例如，调用组件的paint（Graphics）方法，并将BufferedImage.createGraphics（）调用的结果传递给该方法。 Once painting is done, check pixel values in the range you need by calling BufferedImage.getRGB(x, y). 绘制完成后，通过调用BufferedImage.getRGB（x，y）检查所需范围内的像素值。