digitalcamera39sandwebcams-在線瀏覽
2024-12-02 21:43本頁面
【正文】 ? What brands ? What features ? Memory ? Price What is a digital Photograph? ? Depends who you talk to!? ? Conversion of light intensity and colours into Digital bits ? Pixel – series of dots on the screen (picture element) ? RGB – $250,000 question on who wants to be a millionaire ? Bit Maps ? Additive Colour process Colour ? Using three primary colours through an additive process ? Varying intensity and bining gives us millions of colours Pixels ? What do they look like? Pixels ? Think of it as Jelly Beans (this picture) What is… Cont’d ? Screen Resolution ? Digital Camera Resolution ? . Resolution ? Printer/Scanner Resolution Screen Resolution ? 800 x 600 pixels and variations ? Optical vs Digital resolution Resolution Element Resolution Total Pixels Color TV (NTSC) 320 x 525 168,000 Human eye 11,000 x 11,000 120 million 35mm slide The Economist magazine says it has 20 million or more. CMOS Imaging News says 5 to 10 million depending on the film. Another source says about 80 million pixels. Robert Caspe at SoundVision states that color negative film has 1000 pixels per inch while color positive film has 2020 pixels per inch. Resolution ? Same Image, different size Resolution ? Stylus 300: ? Adjustable Resolutions2048 x 1536 SHQ, JPEG 2048 x 1536 HQ, JPEG 1600 x 1200 SQ1, JPEG 1280 x 960 SQ2, JPEG 1024 x 768 SQ2, JPEG 640 x 480 SQ2, JPEG 320 x 240 15fps QuickTime Motion JPEG 160 x 120 15fps QuickTime Motion JPEG Size Isn’t Everything ? Despite your Spam ? An 1800 x 1200 pixel image is approx an 8x10 ? A 640 x 480 is close to a 5 x 4 picture ? Why use a 2400 x 1800 image when it won’t even fit on the puter screen? Printer/Scanner Resolution ? Printer and scanner resolutions are usually specified by the number of dots per inch (dpi) that they print or scan. (Generally pixels per inch refer to the image and display screen and dots per inch refer to the printer and printed image. ? For parison purposes, monitors use an average of 72 ppi to display text and images, inkjet printers range up to 1700 dpi or so, and mercial typesetting machines range between 1,000 and 2,400 dpi. Checklist ? Will you be shoot
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