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This demonstrates till what level of Cb, Cr downsampling human eye can't detect: from PIL import Image import numpy as np def downsample_cb_cr(ycbcr, ds_level): w, h = ycbcr.size ycbcr_np = np.asarray(ycbcr) ycbcr_res = ycbcr.resize((w//ds_level, h//ds_level)) ycbcr_ds = ycbcr_res.resize((w, h)) ycbcr_ds_np = np.array(ycbcr_ds) ...


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