Text Inpainting and Its Application in Video Captcha Text Removal
نویسندگان
چکیده
Video CAPTCHA improves the usability while reducing the attack success rate compared to a conventional text-based CAPTCHA. However, it remains vulnerable to OCR attacks. Thus, we proposed to use inpainting algorithms to remove the contained text in the video frames, so that the OCR success rate can be reduced without introducing unwanted artifacts that displease the endusers. We implemented Bertalmio’s Image Inpainting for our particular case of text inpainting and managed to prove through OCR attacks on inpainted text-containing image that inpainting can potentially help to improve the security of Video CAPTCHA.
منابع مشابه
Uniform and Robust Modelling of Edge Based Text Region Detection with Image and Video Inpainting using Morphological Operation
The proposed system introduces a novel technique of text detection and removal from the input image as well as video called image inpainting using a cost effective computational technique. The paper discusses about inpainting problem empirically and proposes a new inpainting mechanism where the same algorithm can perform text removal from both image and video. Use of an effective morphological ...
متن کاملSelf-directing Superimposed Text Detection and Removal from images using Inpainting for Region Filling with Smoothing
In this paper we have implemented an improved superimposed artificial text detection and inpainting method. Two stage frame works to remove unwanted text from images: Detection of text from image and removal of text using method of inpainting. Smoothing is used to bring more efficiency and reduction of noise and unwanted connected components at the first. With the use of feature extraction, str...
متن کاملVideo Subject Inpainting: A Posture-Based Method
Despite recent advances in video inpainting techniques, reconstructing large missing regions of a moving subject while its scale changes remains an elusive goal. In this paper, we have introduced a scale-change invariant method for large missing regions to tackle this problem. Using this framework, first the moving foreground is separated from the background and its scale is equalized. Then, a ...
متن کاملEvaluating the Usability of Optimizing Text-based CAPTCHA Generation
A CAPTCHA is a test that can, automatically, tell human and computer programs apart. It is a mechanism widely used nowadays for protecting web applications, interfaces, and services from malicious users and automated spammers. Usability and robustness are two fundamental aspects with CAPTCHA, where the usability aspect is the ease with which humans pass its challenges, while the robustness is t...
متن کاملAutomatic Text Detection Using Morphological Operations and Inpainting
Image inpainting is the process of restoring the lost or damaged regions or modifying the image contents imperceptibly. It refers to the process of filling-in missing data in a designated region of the visual input. In this paper, the technique presented is for detection and removal of text from images. The system detects text using morphological operations, connected component labelling and a ...
متن کامل