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Canon is a leading provider of consumer, business-to-business, and industrial digital imaging solutions.
A.k.a. matrix metering or segmented metering. This type of system takes a light reading from many different areas of the frame. The microprocessor then calculates this information into a composite reading that takes into account the differences within the frame.
Industry:Consumer electronics
A method of storing digital information that maps an image pixel out, bit by bit. The density of the pixels determines how sharp the image resolution will be. Most image files are bit mapped. This type of file gives you the 'jaggies,' stair-stepped edges that become apparent when you zoom in. Bitmap images are compatible with all types of computers. The desktop for all Windows machines uses .bmp files, while the Macintosh uses .pict files. Most Internet publishing and e-mail use JPEG or .JPG and .GIF (89a) formats. Canon PowerShot cameras store their pictures in JPEG format.
Industry:Consumer electronics
The bit-mapped file format used by Microsoft Windows. The BMP format supports RGB, indexed-color, grayscale, and Bitmap colour modes.
Industry:Consumer electronics
This is an excellent method of coming to an understanding of the f/stop function. It is a technique in which takes a subject and takes a number of pictures from the same viewpoint at differing levels of exposure. Half or one f/stop (+/-) differences are usually selected depending on the subject.
Industry:Consumer electronics
Charge-coupled device. The image sensor that separates the spectrum of colour into red, green and blue for digital processing by the camera. In digital cameras both Area and Linear CCDs are used. A CCD captures only black-and-white images. The image is passed through red, green and blue philtres in order to capture color.
Industry:Consumer electronics
A square or rectangular CCD that can capture an entire image at once, which is essential for dynamic subjects and flash photography.
Industry:Consumer electronics
A.k.a. scanner-type CCD, these sensors are long and thin, and capture an image by recording a vast number of individual "exposures" while scanning across the picture frame. These are best suited for still subjects and continuous illumination.
Industry:Consumer electronics
A method of determining the correct exposure for a photograph which gives more importance to the light metre reading at the centre of the frame than to the peripheral areas. This method is often criticised for being too limiting to the photographer. The PowerShot S10, S20 and S100 all utilise a 3-point focal system that frees you from having to keep your subject centred at all times.
Industry:Consumer electronics
Complementary Metal Oxide Semiconductor. A type of semiconductor that has been, until the EOS D30, widely unavailable for digital cameras. CMOS semiconductors use two circuits, negative and positive polarity circuits. Because only one of the circuits can be on at once, CMOS chips are less energy consuming than other chips that utilise simply one type of transistor. This is a clear advantage of the CMOS sensor over the standard CCDs in use today.
Industry:Consumer electronics
Cyan, Magenta and Yellow. The three colours used to make all other colors. Like CMYK, CMY is used in printing to create the colours seen in a print.
Industry:Consumer electronics
