4500PD1.WOS - Digital Camera - CCD Image Sensor Image...

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Digital Camera - CCD Image Sensor Image sensing systems such as flm cameras, digital cameras, CCDs, CMOS ar- rays, TV cameras, and movie cameras each have a specifed image aspect ratio, AR . The image aspect ratio is AR = L Wim /L Him and is expressed as a ratio oF integers. The quantities L and L are shown in the fgure below. ±or 35 mm flm, the width oF the flm is 35 mm . However, For 35 mm flm, the image Format is L =3 6 mm and L =2 4 mm . ±or the Canon models S230, SD550, and SD630 digital cameras, one oF Four or fve image “resolutions” can be se- lected. These “resolutions” represent the number oF recording pixels used to Form the image. Each pixel is square with a side dimension oF L pixel . ±or electronic sensors, the size oF the image sensor element is designated histor- ically according to standard TV camera tube diameters. The size L T is the outside di- ameter oF the glass envelope oF the TV camera tube as shown in the fgure. The size L T does not represent the diagonal size oF the sensor array L D . The sizes are historically
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4500PD1.WOS - Digital Camera - CCD Image Sensor Image...

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