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Based on a third-party open source software (OSRA: Optical Structure Recognition), Leadart Technologies developed this online tool and added some additional functions for better and more convenient use. This tool and website is not for profit and is free for public use. We are not responsible for any potential loss associated with the use of the above tool, including direct and indirect loss. Other than the open source software, we reserve all the rights of the functions and design developed on this website.