Types of Computer Image Problems
Computer images are made of pixels, which are tiny bits of data that form the pictures that computers display. So when a computerized image looks horrible in print or onscreen, there is usually a technical reason. The common types of problems you can observe in a digital image may affect its color, clarity or both. Recognizing what is causing the diminished quality might prompt you to either fix the problem or change the equipment you use to capture the image.
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Low bit depth
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If the digital photo lacks bit depth, you will see an image quality defect as multiple tones compressed into a single brightness. Recognize a low bit depth problem by identifying areas in the image where bands of tones are occurring in places where smooth transitions should be. Your texture areas may look flat and poster-like. Digitizing images at higher bit depths will solve this issue.
Color imbalance
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Of all computer image problems, this one can be easy to recognize. All you need to do is look at the neutral tones and white areas of your image. If you see an unusual cast of an out of place color, such as red or blue, your digital image contains a color imbalance. Correcting this issue may require rescanning the image with special attention to your scanner's color settings. You can also modify the computer image's color with photo-editing software.
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Noise
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Noise is the presence of nonimage forming tonal variations in a digital photograph. It may be easy to see noise in the shadow areas of a digitized image. This problem adds nothing to the image's composition--it actually tends to obscure or even replace image detail. Noise usually occurs after using a camera that captures images at a low resolution. You may notice noise in low-light digital photographs taken with a cell phone.
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References
- Photo Credit take pictures image by Sergey Galushko from Fotolia.com
