Amounts of data in digital image processing
In digital image processing significantly larger amounts of data are required to be processed as this is normally the case with the analysis of time series. In order to get a feeling of the amount of data, estimate the amount of data that is to be processed in the following typical real-world applications.
1. Water wave image sequences. In a wind/wave facility image sequences are taken from wind waves at the surface of the water (Section 1.2.3, Fig. 1.8). Two camera systems are in use. Each of them takes image sequences with a spatial resolution of 640 × 480 pixel, 200 frames/s and 8 bit data resolution. A sequence of measurements runs over six hours. Every 15 minutes a sequence of 5 minutes is taken simultaneously with both cameras. How large is the data rate for real-time recording? How much data needs to be stored for the whole six hour run?
2. Industrial inspection system for laser welding. The welding of parts in an industrial production line is inspected by a high-speed camera system. The camera takes 256 × 256 large images with a rate of 1000 frames/s and a resolution of 16 bit per pixel for one second in order to control the welding of one part. One thousand parts are inspected per hour. The production line runs around the clock and includes six inspection places in total. Per hour 1000 parts are inspected. The line runs around the clock and includes six inspection places. Which amount of image data must be processed per day and year, respectively?
3. Driver assistance system. A driver assistance system detects the road lane and traffic signs with a camera system, which has a spatial resolution of 640 × 480 pixel and takes 25 frames/s. The camera delivers color images with the three color channels red, green, and blue. Which rate of image data (MB/s) must be processed in real time?
4. Medical volumetric image sequences. A fast computer tomographic systems for dynamic medical diagnosis takes volumetric images with a spatial resolution of 256 × 256 × 256 and a repetition rate of 10 frames/s. The data are 16 bit deep. Which rate of data (MB/s) must be processed?