As camera resolution increases, high-speed non-contact text capture through a digital camera is opening up a new channel for text capture and understanding. Unfortunately, the captured document images are normally coupled with the perspective and geometric distortions that cannot be handled by the existing optical character recognition (OCR) systems. In this paper, we propose a new technique, w...

This paper presents a document restoration technique that is able to flatten curled document images captured through a digital camera. The proposed method corrects camera images of documents through image partition, which divides distorted text lines into multiple small patches based on the identified vertical stroke boundary (VSB) and the fitted x-line and baseline of text lines. Target rectan...

This document shows the details on Multi-Label Energy Optimization (MLEO) method used for circular arcs selection and additional results for Line-Based Multi-Label Energy Optimization for Fisheye Image Rectification and Calibration, described in the submitted manuscript (CVPR submission 1687). The Structure of this document is as follows: • The next section describes details about the relations...

The comparison between aerial photographs and satellite images, with regard to their performance, is strongly actual: in fact, advantages and defects of both are well known. In the past , low spatial resolution of satellite images was a limit in cartographical applications : now, the recent orbital platform are improving the data quality and, at the same time, make very large ground coverage po...

Abstract. This paper mainly describes the rectification method of digital airborne image distortion. First, according to the digital sensor model, the mathematical model of airborne image is built up for processing the geometrical data of image, which is also the key for digital rectification. Then, the principle of digital rectification is explained through discussing the direct method and the...

Two of the important stages in the production of maps from remotely sensed imagery are rectification and classification. Residual geometric errors following rectification produce a “component” of the apparent classification error. Hence, besides being of value in its own right, reduction of the rectification error will enhance the quality of the classification stage, and the classification accu...

Stereo image is frequently used as preprocessing of stereo vision techniques. Although stereo image rectification is performed using look-up tables which are computed in advance, it takes a long time to do rectification transformation on mobile platforms. Thus stereo image rectification process can be burdensome in stereo vision applications on mobile platforms. This paper presents an approach ...

This paper introduces the algorithm on SAR image orthorectification based on polynomial rectification and height displacement correction, and experiments according to the algorithm on ERS-2, RADARSAT, and airborne SAR image in mountain area. Many factors result in SAR image distortion, and most of them can be corrected by polynomial rectification. But the distortion of SAR image brought by elev...