{'fraction_non_alphanumeric': 0.01566951566951567, 'fraction_numerical': 0.0, 'mean_word_length': 5.166666666666667, '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}}
Archival Image Restoration Using Non-linear Contrast Stretching

From the early age of technology mankind is always fascinated about capturing the scenes around them. These photographs work as an important media to know and understand the past. Unfortunately, due to aging, repetitive usage and in presence of external reagents, the perceptual quality of these old images degrade severely. Thus, restoration of vintage photographs is an important application of digital image processing. In this paper we propose an algorithm which is able restore an image suffered with contrast fading and color cast. The approach can not only restore grayscale images but also is able to binarize archival documents.