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    v821介绍里面的32倍缩放是怎么实现的?

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    • Q
      quanzhi111 LV 5 last edited by

      a4c87850-070c-47cb-8352-a2a2d838a1b9-image.png 有懂的大佬吗?

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      • J
        jasonzhang LV 5 @quanzhi111 last edited by xiaowenge

        @quanzhi111
        全志的芯片大部分标配G2D模块,其中一项功能支持硬件的1/16和1/32采样缩放。

        g2d.png

        其实缩放软件实现也很简单,1/16缩放就是行和列分别1/4读取数据,行从0开始,满4取像素点,列从0开始,满4选行数,是图形处理最基本的方法。

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        • Q
          quanzhi111 LV 5 @jasonzhang last edited by

          @jasonzhang g2d能实现32倍放大?不是1/32缩小哦。比如从6436 放大到19201080?

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          • A
            awwwwa LV 8 last edited by

            这个是VIPP通道缩放,是硬件实现的

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