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Does a 120 line halftone screen have more dots per square inch than a 150 line halftone screen?
Wiki User
∙ 15y ago
No, exactly the opposite. A 150 line screen has more dots per inch and produces a finer quality of image than a 120 line scree. Most newspapers use 120 line screen, or dpi, because the quality of newsprint paper is low, and more ink is absorbed into the paper. A finer line screen is used for a higher quality of paper, usually a coated stock.
Wiki User
∙ 15y ago
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What is the density of pixels on a screen called?
Are you referring to the screen resolution? The higher the setting, the more pixels per square inch there are, thus a higher resolution.
What is LPI?
LPI = Lines per Inch It is a measure of the fineness or coarseness of the screening in photographs and tints in a printed piece. The term comes from back when we halftoned images by photographing them through screens, which are pieces of film with a pattern of dots on them--you measured off an inch and counted the number of dots in a straight line. Or, actually, someone at the screen factory did it; they were marked, so if you wanted a 133-line screen you just took it out of the box--which you ALWAYS put it back in after you were done using it, because they scratch easily and they're hundreds of dollars each. You can still get these, by the way--people still shoot halftones on cameras. Four things go into determining your linescreen: the reproduction process, substrate, prepress imaging device and source image all play a role. As to the reproduction process, some ways to print will "hold" a higher linescreen than others. Offset's higher than flexo which is higher than screenprinting. The substrate is what the product is being printed on. If you're running on Kromekote, which is a paper with a mirrorlike surface that really doesn't absorb ink, you can get a far higher LPI than if you're running on a cotton t-shirt. The prepress imaging device is obviously important, and here's how you calculate the maximum screen frequency you can get out of it: divide the resolution you're using by 15. A dot in a digital halftone screen is made of a group of device dots (aka a "supercell") and you need 100 device dots per supercell so you can get all the dot percentages from 1% to 100%. You need to have more dots per cell available because not all dots are the same shape--some run up-and-down, some side-to-side--so we've found a supercell that's 15 dots square, or some multiple thereof, works well. So...if you have a 2400dpi or 2540dpi imager, you can get a smooth 150-line screen out of it. And for the source image...the rule of thumb here is, "maximum LPI is one-half the DPI." In other words, a 300dpi image gives a good 150-line screen. The resolution of certain output (and input) devices is sometimes defined in LPI
What is tire pressure measured in?
PSI (pounds per square inch) depending what part of the world you live in.
What is the cross-sectional area of a wire if its outside diameter is 0.06525 inch?
0.3344 square inch
What is conversion between square inches to square meters?
1 square inch is 0.00064516 square meters. 1 square meter is 1550.0031 square inches.
What is halftone screen printing?
A halftone is a method of representing different shades of gray with dots of solid color. The more closely spaced the dots, the darker the color. The resolution (or number of dots per inch), determines how many shades of gray can be produced. Ahsan uddin shan
On a computer screen the more pixels that appear per square inch the higher the dpi?
Yes. DPI - dots (in this case pixels) per inch.
What is screen-resolution?
Refers to the sharpness and clarity of an image. The term is most often used to describe monitors, printers, and bit-mapped graphic images. In the case of dot-matrix and laser printers, the resolution indicates the number of dots per inch. For example, a 300-dpi (dots per inch) printer is one that is capable of printing 300 distinct dots in a line 1 inch long. This means it can print 90,000 dots per square inch. For graphics monitors, the screen resolution signifies the number of dots (pixels) on the entire screen. For example, a 640-by-480 pixel screen is capable of displaying 640 distinct dots on each of 480 lines, or about 300,000 pixels. This translates into different dpi measurements depending on the size of the screen. For example, a 15-inch VGA monitor (640x480) displays about 50 dots per inch.
What is the name of the dots used in photo journalism?
Oddly enough, they're just called "dots," and are part of what's commonly known as a "halftone screen." The number of dots per inch determines the resolution of the printed halftone photo (the more dots, the sharper the picture -- 150 dpi allows for much finer detail resolution than 72 dpi). The reason this effect was required is that offset printing is not capable of reproducing shades or gradations of tone -- there's either ink on the paper or not. Reducing a continuous tone photo to a series of dots allows it to be reproduced on a printing press. Without the dot structure, the press would simply print a blotch of ink. Traditionally the halftone was achieved by laying a reusable, semi-transparent screen of the desired frequency (number of dots per inch) over high-contrast photographic paper on an enlarger (or by a similar process on a "line camera," but that's a whole 'nother topic). Bright areas of the picture were thus translated to small dots on the paper; darker areas comprised larger dots. Nowadays, most pre-press operations use scanners, computer graphics programs and digital output systems to produce halftones.
What is 400 600 dpi?
dpi is dots per inch. 400 * 600 dpi is the number of ink dots per square inch that are produced by a computer printer.
What is the are of a square television screen with 16 inch sides?
256 square inches
What is screen resolution?
Refers to the sharpness and clarity of an image. The term is most often used to describe monitors, printers, and bit-mapped graphic images. In the case of dot-matrix and laser printers, the resolution indicates the number of dots per inch. For example, a 300-dpi (dots per inch) printer is one that is capable of printing 300 distinct dots in a line 1 inch long. This means it can print 90,000 dots per square inch. For graphics monitors, the screen resolution signifies the number of dots (pixels) on the entire screen. For example, a 640-by-480 pixel screen is capable of displaying 640 distinct dots on each of 480 lines, or about 300,000 pixels. This translates into different dpi measurements depending on the size of the screen. For example, a 15-inch VGA monitor (640x480) displays about 50 dots per inch.
Are all scanners the same?
No. Image quality depends on DPI (dots per square inch).
Define and explain LPI in terms of pre press?
LPI Stands for "Lines per inch". The number of lines printed in a Vertical inch. The offset Printing lines per inch in a halftone or line screen. LPI is a measure of the fineness or the coarseness of the screening in photographs and tints in a printed piece.
What is the area of a square television screen was 16-inch and sides?
The area of square is : 256.0
How is the resolution of a printer measured?
Resolution is normally measured in Dots per inch (dpi)This means how many dots are in one inch. The higher the number - the more dots per inch - the better the resolution.
What is the area of a square television screen with 16-inch side?
A square TV screen with a side length of 16 inches has an area of 256 square inches.
