Higher performance and more sophisticated functions have been required in the digital still camera market growing at the rapid rate. On the other hand, the cost of hardware has been increasing to meet these requirements. In light of this situation, a new image processing technique is presented to achieve the digital still cameras with the higher performance at lower cost. The present technique focuses on the real time sequence capturing of single CCD images using the fixed block truncation coding (FBTC). FBTC is an embedded compression scheme we proposed to handle the image data with high quality in the hardcopy peripherals. In the digital still camera using the present technique, the sequence capturing rate is up to 30 frames per second for Video Graphic Array (VGA) size (640×480) full color image. Comparing with conventional technique, FBTC coding scheme can reduce the memory size for capturing the raw image from CCD to less than a half, and enable to transfer capturing image at twice rate.
The authors have developed measuring methods to assess and characterize colour reproduction of digital still cameras and digital video cameras for use in computer systems and similar applications. For objective assessment of the performance of digital cameras which capture colour images and output corresponding colour information in red-green-blue digital data, the methods incorporate measurements of characteristics in terms of spectral responsivity and related items. Furthermore, they have developed another new method of measurements to cover some possible defects in the conventional methods, considering negative lobes in spectral responsivity which exist in some cameras designed based on ideal characteristics. The paper describes an arrangement of equipment, definition of test chart and raw data handling together with some worked examples.
The focal length of film conversion is strongly appealed also with the video camera or the digital still camera. However, knowing the actual focal length becomes the aid which knows the feature of the camera well. Investigate how fundamental optical technology is guided this time and the characteristic of the lens changes by the difference in the CCD element, and since it employed in the design of the 3X Super Wide-Angle Zoom Lens which developed itnewly, efficiently, report.