File:160 by 160 thumbnail of 'Green Sea Shell' - 2. downsampling to 40 x 40 (nearest neighour).png
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160_by_160_thumbnail_of_'Green_Sea_Shell'_-_2._downsampling_to_40_x_40_(nearest_neighour).png (40 × 40 pixels, file size: 2 KB, MIME type: image/png)
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Summary
| Description |
English: 160_by_160_thumbnail_of_'Green_Sea_Shell' - 2. downsampling to 40 x 40 (nearest neighour)
matlab Code: filt=zeros(160,160); filt(1:20,1:20)=1; filt(end-19:end,1:20)=1; filt(1:20,end-19:end)=1; filt(end-19:end,end-19:end)=1; x160_f(:,:,1)=ifft2(fft2(double(x160(:,:,1))).*filt); x160_f(:,:,2)=ifft2(fft2(double(x160(:,:,2))).*filt); x160_f(:,:,3)=ifft2(fft2(double(x160(:,:,3))).*filt); x160_d(:,:,1)=x160_f(1:4:end,1:4:end,1); %downsampling nearest neighbour x160_d(:,:,2)=x160_f(1:4:end,1:4:end,2); x160_d(:,:,3)=x160_f(1:4:end,1:4:end,3); figure; imagesc(uint8(real((x160_d))))) % clipping/saturating to 0...255 by uint8 |
| Date | |
| Source | File:160_by_160_thumbnail_of_'Green_Sea_Shell'.png |
| Author | James Petts / shaddim |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:00, 21 May 2022 | | 40 × 40 (2 KB) | Phreneticc | Reduced "weight" of the file. |
| 11:33, 3 April 2016 |  | 40 × 40 (5 KB) | Shaddim | User created page with UploadWizard |
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