{'fraction_non_alphanumeric': 0.02047244094488189, 'fraction_numerical': 0.0, 'mean_word_length': 4.389830508474576, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Improving image quality for block coding by image division method

In block coding, the original image is divided into square blocks composed of N×N pixels, and the coding is applied to each block. When the image is coded at a low bit-rate, however, there is often produced a block noise in the reconstructed image. When a block noise is produced in the part of the time where the change of the gray-level is slow, the noise deteriorates the image quality greatly. To reduce the block noise, this paper proposes three methods of image division. Let the blocks in a horizontal row in the conventional divided image be called a block row