IPhone 4's display also saw an upgrade to "retina display", featuring an increase pixel count making individual pixels invisible to the human eye.
iPhone 4的显示屏也升级为“视网膜显示屏”，增加了人眼无法识别的单独像素的密度。
2
The pixel labeled algorithm is an effective method to obtain the objects s feature in image processing.
像素标记算法是图像处理中提取目标特征量的一种有效方法。
3
You indicate a stretchable section by drawing one (or more) 1-pixel-wide black line (s) in the left and top part of the border (the other border pixels should be fully transparent or white).