pixel-to pixel operation 像素间演算
You can use a get operation to read the color of a given pixel in the display.
可以使用get操作来读取显示中的一个给定像素点的颜色。
Pixel Qi had to redesign every layer of a standard LCD to enable this dual-mode operation.
Pixel Qi须重新设计标准LCD的每一层，以实现这种双模操作。
But the arithmetic product operation is needed to determine a pixel belonging to which circular ring, which consumes much time.
但由于确定各像素点属于哪一个圆环需要进行复杂的乘积运算，耗费了大量时间。
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