Where can I find a filter like this for AviSynth ? :) Here is the image in ACDSee, when I zoom at 1000% : This upscaling is effective in other programs (like ACDSee) too.īut it's enough impressive, because when we enlarge a picture, it's almost transparent. In the right window, I upscaled the image 4X with Nearest Neighbor filter. The upscaling by the Intel HD is effective in the left window. Strangly, I noticed on my notebook (with Intel HD4600 chipset), that in VirtualDub a upscaling was effective with previews. I tried the SimpleResize with this base of code : The best I tried is the SimpleResize, but the YV24 and RGB24 color formats aren't supported, so I have a loss of accuracy for the colors :( When I do an enlargement oh the image with classic resize filter, it becomes inaccurate horizontaly. In the sampled version of the signal each non-square pixel from the console influences the color of 1 or 2 horizontally adjacent square pixels making it slightly blurry on the horizontal axis. On a PC each pixel has the same width and height, or in other words a pixel aspect ratio of 1:1. The actual pixel ascept ratio (PAR) for the SNES is 11:10. To fill the screen the pixels are slightly stretched, resulting in pixels that are wider than tall. In the case of the SNES there are 256 pixels horizontally in each line on the console. These pixels are stretched to fill a whole line on the screen. Retro consoles usually only have a low amount of pixels in the horizontal resolution. Usually there are 720 or 640 horizontal pixels after the sampling step.Ģ40p signal with non-square pixels sampled and linedoubled to 720x480 pixel. The number of pixels is fixed and doesn't take the original console into account. In the process of creating a digital version of the signal the picture lines are sampled and pushed into a mask of pixels. On LCD screens and for capture this is a problem. On CRTs it doesn't matter that there is no horizontal sync information, because each line of the picture is drawn across the whole screen. RGBHV is used in more modern devices for VGA for example. This is commonly called RGBS as opposed to RGBHV, where H and V stand for the horizontal and vertical sync. This type of sync doesn't contain information about the horizontal pixels. I try to upscale video captured with a Super Nes emulator (Snes9x) which are in a resolution of 256x224, in a resolution of 1408x1080.Īnalogue RGB signals from retro consoles use composite video or composite sync in addition to the color information.
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