File:Nes ntsc perscanline.gif: Difference between revisions

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(uploaded a new version of "File:Nes ntsc perscanline.gif": Fixed the horizontal displacement error. Also added (subtle) dithering to help overcome the color differences arising from quantization (reduction to 256 colors).)
(Persune uploaded a new version of File:Nes ntsc perscanline.gif)
 
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Latest revision as of 12:38, 27 December 2024

A testcard picture, intentionally resembling Philips PM5544, but rendered with NES colors.

Rendered in 2048x240, then pixel-upscaled to 2048x1920, then lanczos-downscaled to 584x480. This method of scaling was chosen to best inhibit scaling related artifacts.

This image is part of a set illustrating the differences between palette-and-pixel-based and scanline-and-ntsc-signal-based rendering in NES emulation. This image shows the scanline-and-ntsc-signal-based rendering.

Note that the colors are not perfectly reproduced from the original rendering, due to GIF palette reduction. A NeuQuant-based method was used in order to generate the most optimal palette to represent it.

File history

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Date/TimeThumbnailDimensionsUserComment
current12:38, 27 December 2024Thumbnail for version as of 12:38, 27 December 2024584 × 480 (139 KB)Persune (talk | contribs)Remove saturation correction based on colorburst amplitude
16:56, 23 December 2024Thumbnail for version as of 16:56, 23 December 2024584 × 480 (139 KB)Persune (talk | contribs)Updated composite filter code to reflect NTSC video decoding section
21:56, 21 September 2021Thumbnail for version as of 21:56, 21 September 2021584 × 480 (117 KB)>Maintenance script== Summary == Importing file

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