Hi Shuzhen, On Sunday 21 November 2010 00:50:59 Shuzhen Wang wrote: > Hello, Laurent, > > Thank you for the reply. > > In our case, most of the time the sensor outputs bigger image size than the > output size, so the ISP hardware does downscaling. > When zooming in, we can do cropping, and less downscaling to achieve the > same output size. All these happen under of the hood of ISP driver. > That's why I said it was like optical zoom to the application. > > So if "digital zoom == cropping and upscaling", then I don't think my case > fits in digital zoom category. Digital zoom is cropping and scaling. Whether it's downscaling or upscaling (or even no scaling it all for a specific resolution) is not really relevant here. It depends on the output resolution but it's still digital zoom that should be implemented using the crop API. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
