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楼主 |
发表于 2004-2-6 16:42
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ffdshow Resize filter to Sharpen
I have not seen anyone discussing the use of ffdshows Resize filter to sharpen.
I find that using the Luma and Croma sharpen function in ffdshow resize filter gives a much more natural effect than any other sharpen filters IMHO.
Also the order the filters are used is important for performance and quality.
My recommendation for filter run ORDER in ffdshow is as follows.
1. Deinterlace (If Required)
2. Levels and or Picture Properties
3. Descaler (GradualNoise) or Blur & NR (Gradual Denoise or Temporal Smooth)
GradualNoise is a CPU Killer. Temporal Smooth is less so. Gradual Denoise is easy on the CPU and is my recommendation.
4. Resize (Bicubic) up to at LEAST 25-30% higher than DVD resolution. 200% is good, but hard on CPU. Do this even if your display is only low resolution.
Let the video card rescale the picture back down for output to display.
This gives a very subtle smoothing effect.
5. Last, us the Luma and Croma sharpening in the resize filter.
This looks more natural IMHO than any other shapening filters I have tried.
The Resize and Sharpening needs lots of CPU power.
If you have a fast CPU you can try running the Denoise filters last, after the resize filter so that it is working on the upscaled image. This can look really good but it is taxing on CPU.
NOTE: You can change the order of filters by using the up/down arrows to the left of a selected ffdshow filter.
So people. Give this setup a go and let me know what you think.
Regards,
Owen. |
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