KEYWORDS: 3D image processing, 3D displays, Cameras, Video, Image quality, Stereoscopic displays, Internet, Image processing, 3D video streaming, Local area networks
This paper presents a technique to display real-time 3-D images captured by web cameras on the stereoscopic display of a personal computer (PC) using screen pixel access. Images captured by two side-by-side web cameras are sent through the Internet to a PC and displayed in two conventional viewers for moving images. These processes are carried out independently for the two cameras. The image data displayed in the viewer are in the video memory of the PC. Our method uses this video-memory data, i.e., the two web-camera images are read from the video memory, they are composed as a 3-D image, and then it is written in the video memory again. A 3-D image can be seen if the PC being used has a 3-D display. We developed an experimental system to evaluate the feasibility of this technique. The web cameras captured up to 640 × 480 pixels of an image, compressed it with motion JPEG, and then sent it over a LAN. Using an experimental system, we evaluated that the 3-D image had almost the same quality as a conventional TV image by using a broadband network like ADSL.
An algorithm for extracting character strings from color documents is described. Most characters on color documents are printed with the same color and font size at every word or text line. The blobs of pixels which have similar color are extracted by a clustering in a color space. Although these blobs are correspond to characters or background patterns, they can be discriminated by using the features of sizes, aspect ratios and pitches of the circumscribing rectangles of the blobs. Some experimental results are also presented and show our algorithm is applicable to color document OCR.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.