A Closer Look at Image ResolutionWritten by Nashville
Image resolution refers to size your image appears on a computer monitor rather than physical dimensions an image will print. The pixel dimensions of an image identify resolution. Many digital cameras let us change image resolution. So, before we take a picture, we must determine quality of an image first by using highest quality setting available on camera. Therefore, set your camera for best image quality if you want to obtain high quality photos.According to article “Image Quality – An Explanation” by Julian Foster which was posted at www3.teleplex.net, a truly high-resolution digital photo can be anywhere from 12MB (for a 4-by-5-inch image) to 70MB (for a two-page-spread photo). The CD ROM photo collections currently on market have files ranging in size from 500K-22MB. He added that image resolution, amount of information in a digital file, is measured in dots per inch. Screen frequency, density of lines of dots used to print a continuous-tone photograph, is measured in lines per inch. Newspapers typically use a coarse line screen of 85 lpi; in-house publications, 100 to 120 lpi; and glossy magazines & good quality offset lithography, 133 to 155 lpi. Proper resolution is truly important for good printing. And to achieve this, you must always remember some rules that include following: text must be 400dpi at final size in layout; images must be 300dpi at final size in layout; dimensions of resolution and size are inversely proportional to each other so, if you enlarge an image, you lower its resolution and if you reduce an image, you increase its resolution; how an image is originally acquired will determine its resolution and thus, size it can print at for clear and crisp printing; and low resolution images print with jagged edges and appear fuzzy.
| | GETTING TO KNOW CMYKWritten by Blur Loterina
You may wonder why colors are grouped into different modes. And no, there’s no racial discrimination involved. For nature of design to flow in an organized manner, there are primary colors, secondary colors, tertiary colors, etc. If you are not familiar with family of colors, here is one way of understanding how they are grouped and how they are used.The most common color groups are RGB, HSB (Hue, Saturation and Brightness), CMYK and CIE L*A*B. Vector and bitmap graphics are always associated with RGB and CMYK, so we must familiarize ourselves with these modes. CMYK stands for cyan, magenta, yellow and black. The letter K was taken from last letter of color. The first letter was not used because there are other colors that start with letter b. in this way, confusion of colors will be eliminated. CMYK colors are inks used in printing process to produce full-color photographs and designs. In principle of graphics design, these colors are called subtractive colors. When you combine two of any of first three colors (cyan, magenta and yellow), it will produce three primary colors (red, green and blue), called additive colors. In other words, CMY is product of combining RGB and RGB is product of combining CMY. When CMY colors are mixed you will have black. But there are still other colors produced from CMYK.
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