Generate a Red Image

生成红色图像

In this example, the fill() method are used. the fill() method fills a array or a specific channel or channels with a constant value. the fill() method is an inplace operation. ImageArray and Img have the same useage.

bellow there is a red and blue image, generate by ImageArray and Img seperately.

下面会显示一个256x512的红色图像。代码可从控制台查看！

exercise

请参考代码生成一幅128x256的黄色的图像，并显示在下方。（黄色是由红色和绿色合成的。）