 | | Understanding Resolution in Adobe Photoshop CS4or designers working ingraphic design companies using Adobe Photoshop CS4, it is important to understand the various resolution-attributes like dimensions, bit depths, and color models. These are discussed below:
The dimension of an image should be set with a proper pixel value. Although, Photoshop has a maximum pixel limit of 300000 X 300000, graphics designers usually prefer to keep the dimension to a lower resolution (for example, 400X400 pixels). Similarly, one can work with bit depths up to 32 floating-point bits per channel in HDR (High Dynamic Range) mode in graphic web design ; although, most image editing is done at 8 bits per channel (24-bit RGB and 32-bit CMYK).
The different resolution types are:
Sampling Resolution - For scanned images, sampling resolution gives a measurement of precision of the scanning process which is measured in sample per inch (spi).
Document Resolution - The resolution value saved in the file when an image is imported from any software, is known as document resolution. The image quality changes only when the image is resampled.
Effective resolution - The effective resolution is the resolution of the image after it is scaled (by compressing or stretching the pixels) to its final print size.
Device resolution - It is the resolution of the output device. In graphic and web design, where the output device is not specific, it is essential to keep the resolution to a common and acceptable figure.
To give details of the resolution of an image, following parameters are important:- Pixel Dimensions
- Physical Dimensions and Resolution
- File Size
- Megapixels
- Single-Side Dimension.
- 'Res' or the number of pixels per millimeter
A bigger resolution does not necessarily mean a better resolution. A higher means that it would take longer to get saved, printed or opened. At the same time, a lower resolution may result in a pixelated image with a degraded quality. So, it is essential for a web graphic designer to keep the right resolution balance depending on the purpose of the final image. |
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| The Hundred-Year Lie: How to Protect Yourself from the Chemicals That Are Destroying Your Health
by Randall Fitzgerald |  | In the tradition of Silent Spring and Fast Food Nation, investigative journalist Randall Fitzgerald warns how thousands of man-made chemicals in our food, water, medicine, and environment are making humans the most polluted species on the planet. A century ago in 1906, when Congress enacted the Pure Food and Drug Act, Americans were promised "better living through chemistry." Fitzgerald provides overwhelming evidence to shatter this myth, and many others perpetrated by the chemical, pharmaceutical, and processed foods industries.
Plume (June 26, 2007)
Product Dimensions: 8.4 x 5.2 x 0.7 inches
Paperback: 304 pages | Consider This:- The average American carries a "body burden" of 700 synthetic chemicals
- Chemicals in tap water can cause reproductive abnormalities and hermaphroditic birth
- A 2005 study of lactating women in eighteen U.S. states found perchlorate (a toxic component of rocket fuel) in practically every mother's breast milk
- Lab tests have found that four common food additives-aspartame, MSG, and two coloring chemicals-interact synergistically to produce nerve damage. These additives are commonly found in junk food marketed to children.
- In the past few decades male sperm counts fell by 50 percent, women's tubal pregnancies increased by 400 percent, and girls eight years old and younger began experiencing puberty. Chemicals are redefining what is "normal"
| Editorial Review:
In 1906, Congress passed the US Food and Drug Act and, according to the author, this has led to the "Hundred-Year Lie" that our food and drugs have been investigated and are safe and that the additives and chemicals put in them may actually make them better than the organic, natural variety. As an investigative reporter, Fitzgerald is expert at using scientific documents, articles in science and environmental journals and expert interviews to support his case. He concludes that we cannot rely on the government, science or manufacturers to either protect us or predict the effects of the products we ingest. As a test, Fitzgerald had his own blood analyzed for toxins and, in spite of living in an area of California known for its pure water and air and careful eating habits, he was shocked to find many toxic chemicals in his blood. While many readers will not agree with his conclusion that "Merely by choosing a diet of pure foods and a lifestyle free of synthetics, we can detoxify ourselves and initiate the healing of many degenerative illnesses and diseases," this book will cause any reader to think about the effect of our own voluntary actions on the health of our bodies. His suggestions for practical steps one can take may prove useful as well, although in the paperback afterword, he fears that denial will prevent most people or governments from taking any significant action.
Reviewer: Nola Theiss (Vol. 42, No. 1) |
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