This paper introduces an intermediate virtual representation, called ideal fisheye image, which obeys the ideal simple projection without camera distortion. By using a look-up-table from the ideal fisheye image to the input fisheye image with distortion, a view-direction-free perspective display can be generated fast in comparison with the method of solving a set of nonlinear equations of camer...

As panoramic images are widely used in many applications, efficient image stitching methods that provide visually pleasant image mosaics are needed. In this paper we discuss a novel concept for smart camera image stitching based on graph pyramids. For a multi-camera system, the images have to be aligned accordingly to create an image mosaic. Instead of calculating the corresponding transformati...

We utilize traces of demosaicing operation in digital cameras to identify the source camera-model of a digital image. To identify demosaicing artifacts associated with different camera-models, we employ two methods and define a set of image characteristics which are used as features in designing classifiers that distinguish between digital cameramodels. The first method tries to estimate demosa...

This paper presents a selective local thresholding method of a camera based document image for applying character segmentation. It is very difficult to binarize a camera based document image due to inconsistent lighting condition. It makes difficulties of character extraction and recognition. A selective local thresholding method in character region can reduce illumination effect and extract pr...

A mobile robot intercepts a target identified in the image plane of a fixed camera without prior knowledge of camera viewpoint or geometry. The target may be identified manually or autonomously. When the robot moves within the camera image plane, the system develops a table of mappings between the image plane and the ground plane in which the robot moves. The robot is identified in the image pl...

Statistical image features play an important role in forensic identification. Current source camera identification schemes select image features mainly based on classification accuracy and computational efficiency. For forensic investigation purposes, however, these selection criteria are not enough. Consider most real-world photos may have undergone common image processing due to various reaso...

We describe a simulation of the complete image processing pipeline of a digital camera, beginning with a radiometric description of the scene captured by the camera and ending with a radiometric description of the image rendered on a display. We show that there is a good correspondence between measured and simulated sensor performance. Through the use of simulation, we can quantify the effects ...

Radial or pincushion distortion problem of the wide angle charge-coupled device (CCD) camera is an important issue in the image calibration in case of close-up photography of real scene. We designed the auto-extraction method of the warping points in the calibration algorithm of the image acquired by the wide angle CCD camera. Proposed method extracts the distortion point by the wide angle CCD ...

Although many camera calibration methods for a non-metric digital camera have been proposed, there are few reports on the precision of calibration results. Therefore, we conducted a field experiment in order to examine the precision of calibration results of a non-metric digital camera. We adopted a calibration method using a set of calibration points distributed on the 2-D plane with no ground...