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Digital Camera Basics - A primer
Digital cameras are confusing to a lot of new users. In this basic guide to digital camera technology we hope to try to give digital beginners at least some basis to use in deciding which digital camera is appropriate for them. When shopping for a digital camera it's at least good to know what the basic terms like white balance, pixel, ppi and dpi mean and how they affect image and print quality. It's also important to know the difference between things like optical zoom and digital zoom as well as the advantages and disadvantages between storage formats such as Compact Flash (CF), Microdrives, Sony Memory Stick, Secure Digital (SD), Multimedia and camera interface technologies such as USB 1.1, USB 2.0 and Firewire IEEE 1394.
A pixel is a contraction if the term PIcture ELement. Digital images are made up of small squares, just like a tile mosaic on your kitchen or bathroom wall. Though a digital photograph looks smooth and continuous just like a regular photograph, it's actually composed of millions of tiny squares as shown below.
Each pixel in the image has a numerical value of between 0 and 255 and is made up of three color channels. So for example a pixel could be 37-red, 76-green and 125-blue and it would then look like this . If it was 162-red, 27-green and 12-blue, it would look like this . There are over 16 million possible combinations using this scheme and each one represents a different color. Computer savvy readers will note that each color in this scheme can be represented by an 8-bit number (byte), so the color of each pixel is defined by three color bytes. This scheme can be expanded, for example to use 16-bits (two 8-bit bytes) for each color. images using three 8-bit values are sometimes called 24-bit color images. images using three 12-bit values for color definition are called 36-bit color images, and those using three 16-bit values are called 48-bit color images.
One of the main ways that manufacturers categorize their digital cameras is in terms of pixel count. What this is is the number of individual pixels that go into making each image. Today this number varies between 1 million (1 Megapixel) to around 14 million (14 Megapixels). A million pixels is abbreviated to MP, so a 1MP camera has 1 million pixels and a 3MP camera has 3 million pixels. Currently most popular consumer digital cameras have between 2MP and 5MP. A 3MP camera can make excellent 4"x6" prints and very good 5"x7" prints. If you intend to make lots of 8"x10" prints, then perhaps a 4MP or 5MP camera would be a better choice. Sometimes two numbers are given, total pixels and effective pixels. Total pixels count every pixel on the sensor surface. Usually the very edge pixels aren't used in the final image. Effective pixels are the number of pixels actually used in the image after the edge pixels have been dropped.
The aspect ratio of a camera is the ratio of the length of the sides of the images. For example, a traditional 35mm film frame is approximately 36mm wide and 24mm HIGH. This has an aspect ratio of 36:24, which can equally well be expressed as 3:2. Some digicams use the same aspect ratio for their digital images. For example most digital SLR (single lens reflex) cameras have a 3:2 aspect ratio. However, video monitors typically use a 4:3 aspect ratio. For example a monitor with a 800x600 display has a 4:3 aspect ratio. With this in mind, most consumer level digicams use a 4:3 aspect ratio for their images.
The size of the digital sensor element (which is equivalent to the size of the negative for film cameras) is pretty small in all consumer digicams - typically around the size of a fingernail (and a small fingernail at that!). As I said above, a 35mm film frame is 24mm high by 36mm wide but most digital cameras use sensors very much smaller than this. Here are some typical digicam sensor sizes. The "name" of the sensor is based on specification for old TV tubes used in the 1950s. Nobody is quite sure why it's being used for modern digital sensors since the "sizes" don't really relate in any consistent way to the actual physical size of the sensor. However these names are widely used, so it's best to know what they are. They are often listed in digital camera spec sheets.
* Quad-band GSM and dual-band 3G support * 3.6 Mbps HSDPA support * Smart dialing * 2.8 inch TFT capacitive touchscreen * Android OS v2.1 Eclair * TouchWiz 3.0 UI customization (on both, I5801 has Orange UI too) * 2MP camera with geo-tagging
Samsung Galaxy 5 i5503 Mobile Phone Specifications :
* Network:Quad band GSM,3G HSDPA * Dimensions:108 x 56 x 12.3 mm * Weight:102 g * Display:2.8 inch TFT capacitive touchscreen, 256K colors,240 x 320 pixels * Accelerometer sensor for UI auto-rotate * Touch Wiz v3.0 * 3.5 mm audio jack * Memory Internal:170 MB * Expandable memroy:microSD up to 16GB, 1GB included * GPRS/EDGE * 3G HSDPA 7.2 Mbps * Wireless LAN access Wi-Fi 802.11 b/g, DLNA * Bluetooth v2.1 with A2DP * USB v2.0 microUSB * Camera:2 megapixel, 1600×1200 pixels,Geo-tagging * OS:Android OS, v2.1 (Eclair) * CPU:600 MHz processor * Messaging:SMS(threaded view), MMS, Email, Push Mail, IM, RSS * Stereo FM radio with RDS * GPS with A-GPS support * Social networking integration * Organizer * Document viewer (Word, Excel, PowerPoint, PDF) * Google Search, Maps, Gmail, * YouTube * Standard battery, Li-Ion 1200 mAh * Stand-by:Up to 521 h (2G) / Up to 375 h (3G) * Talk time:Up to 9 h 30 min (2G) / Up to 6 h 30 min (3G)
Well ya... "they" can call "features" a LOT of things... actual PIXELS is important but SO IS the camera CMOSsensitivity (or light sensitive surface). Also you can have super claimed pixels AND super CMOS sensitivity but have a crummy lens so it all matters and IS a delicate balance and dance.
Of course you also have the option of installing a external SPIFFY USB CAMERA or even a 1,000X Microscope for $10 from Rosemead, CA including shipping! (eBay 282359178078)
Or how about a ENDOSCOPE ~ OHooooooo! * Sorry I got carried away.
Most digital camera's sensors have these so called 'dead pixels' or pixels that aren't functioning. It's normal for your camera to have dead pixels and you cannot do anything to repair it. But some cameras have a certain feature to resolve this issue, the process states that the user manually marks the area of the dead pixel and the camera will try to blend it so that it will appear to more natural. It works by blending the dead pixel to the nearest color of your image.
You can try to reset the camera to factory defaults to see if this improves the monitor. You go to Menu and then left arrow to Reset and press Ok. Up arrow to Yes and Press ok this will put the camera back in factory default settings. If the screen still shows as pixelated, you might try to do a function of the camera called Pixel Mapping. Go to Menu and then right arrow to Setup then down arrow to Pixel Mapping - right arrow to Start and then the camera will try to repair the CCD processing chip inside the camera. If after this completes if the screen is still pixelated, then you want to send it to an Olympus service center for repair.
i have a mercury classic cam 1.3 mega pixels and lost my disk could u please send me the drivers for my camera as i cant get my pics off the camera ty i need software digital camera mercury 3.1 mega pixel model vq2220 maximum resolution
My camera also has a one bad pixel in the LCD; my pixel is green. My camera was also ordered from Buy.com. They have been very helpful and my story is almost identical to yours for their return/replacement practice. It is really nice to see online companies that continue to offer 'great' prices and also provide great customer support.