With the advent of the digital era, the old analog logarithm technology was almost sealed up in the historical warehouse. What are the similarities and differences between digital and logarithm? This is worthy of understanding. The natural world's disparities, strengths, weaknesses, contrasts, shades, etc., all exist in a smooth logarithmic manner. Just as you climb a mountain, no matter if the hill is gentle or steep, it will extend upwards in a diagonal manner, unless There is a rock that blocks the road and must stride or jump to a certain point of force, which creates a disparity.
Today, many hiking trails are equipped with stone steps, cement steps or wooden ladders. They are relatively smooth and stable, and because of the ladder, no matter adults, children, legs or legs are short, the number of steps taken is consistent. That is to say, the logarithm mechanism of the original free-living walking is replaced by a fixed-step length and height-stepping digital mechanism. In contrast, changing the sound, color, power, and current signals from the signal strength of the natural world to a digital signal with energy levels makes it easy to transmit, store, and copy, and the degree of distortion is minimal, thus forming a form of this era. trend. The use of logarithmic signal storage may be several tens of times larger in capacity. At the same time, the degree of distortion in copying is even more serious, and it will inevitably lead to the elimination of fate.
In the world of photography and painting, the vast majority of changes in color are continuous tone. From thick to light or from light to dark, there are no stages or levels and no trace of change can be seen. The exception is the point of the nineteenth century Impressionist painter Sula's point painting, using a small color point piled up into the shades and colors of the picture. At the beginning of the invention of printing, it was mainly the lines of the characters themselves. Then everyone went to the drawing line; in the fate of the letterpress, lithography, and screen printing, each color printing part was a single dark ink color, and only the Milo version. (Glass gelatin film on the ink), photo gravure, can be in a single print with different shades of ink performance. As for the figures and landscapes on today's banknotes, most of them are completed with the fifteenth-century engraving and intaglio techniques.
The thickness of the plain printing plate begins with the crayon strokes. Afterwards, it has developed a convex soft-web pressurizing method, allowing the dot pitches to be fixed, and the dot density to be changed with the size of the pressurizing force to express the screen. Light levels. After the invention of photography, there were two levels of change: one was the photographicization of the manuscript, and the Other was the use of photographic techniques in photoengraving projects. In order to solve the problem of continuous print editions of photos, such as the above-mentioned dots of different coloring methods, Japan first used bamboo sieves for filtering miso sauce to make screens, and the netting tool for forming the spacing of dots was later used as glass. Mesh screens, contact screen screens, and electronic network point generators generate network points, so that relief, lithography, and screen printing are based on the ratio of the area of ​​the network dots to the screen. This technique of converting continuous-tone photographs into half-tone dot printing plates is like a case where data is now converted from logarithmic data to digital information.
In the digital version without printing, including ink jet, photosensitive paper, thermal sublimation, laser printing, ink and thermal transfer methods, many use halftone hard dot method, the performance is very close to the halftone dot of the print, but Some use many levels of ideas, some of them are expressed in 16 steps (24), 64 steps (26), and 256 steps (28). Like IRIS, there were 256 steps before 300 dpi. The effect of the screen is very detailed and beautiful. The dpi's half-tone hard spots have a rough sense, which means that you have to use 1200 dpi to match the 150 line halftone dot fineness. So now there is a very contradictory situation. In the case of color proofing, we must hard-spot or even draw some halftones to get closer to the printed matter; conversely, in order to pursue the effect of the photograph, each color point has a printed texture of the tone, which may be Digital printing is a more important development direction in the future.
Today, many hiking trails are equipped with stone steps, cement steps or wooden ladders. They are relatively smooth and stable, and because of the ladder, no matter adults, children, legs or legs are short, the number of steps taken is consistent. That is to say, the logarithm mechanism of the original free-living walking is replaced by a fixed-step length and height-stepping digital mechanism. In contrast, changing the sound, color, power, and current signals from the signal strength of the natural world to a digital signal with energy levels makes it easy to transmit, store, and copy, and the degree of distortion is minimal, thus forming a form of this era. trend. The use of logarithmic signal storage may be several tens of times larger in capacity. At the same time, the degree of distortion in copying is even more serious, and it will inevitably lead to the elimination of fate.
In the world of photography and painting, the vast majority of changes in color are continuous tone. From thick to light or from light to dark, there are no stages or levels and no trace of change can be seen. The exception is the point of the nineteenth century Impressionist painter Sula's point painting, using a small color point piled up into the shades and colors of the picture. At the beginning of the invention of printing, it was mainly the lines of the characters themselves. Then everyone went to the drawing line; in the fate of the letterpress, lithography, and screen printing, each color printing part was a single dark ink color, and only the Milo version. (Glass gelatin film on the ink), photo gravure, can be in a single print with different shades of ink performance. As for the figures and landscapes on today's banknotes, most of them are completed with the fifteenth-century engraving and intaglio techniques.
The thickness of the plain printing plate begins with the crayon strokes. Afterwards, it has developed a convex soft-web pressurizing method, allowing the dot pitches to be fixed, and the dot density to be changed with the size of the pressurizing force to express the screen. Light levels. After the invention of photography, there were two levels of change: one was the photographicization of the manuscript, and the Other was the use of photographic techniques in photoengraving projects. In order to solve the problem of continuous print editions of photos, such as the above-mentioned dots of different coloring methods, Japan first used bamboo sieves for filtering miso sauce to make screens, and the netting tool for forming the spacing of dots was later used as glass. Mesh screens, contact screen screens, and electronic network point generators generate network points, so that relief, lithography, and screen printing are based on the ratio of the area of ​​the network dots to the screen. This technique of converting continuous-tone photographs into half-tone dot printing plates is like a case where data is now converted from logarithmic data to digital information.
In the digital version without printing, including ink jet, photosensitive paper, thermal sublimation, laser printing, ink and thermal transfer methods, many use halftone hard dot method, the performance is very close to the halftone dot of the print, but Some use many levels of ideas, some of them are expressed in 16 steps (24), 64 steps (26), and 256 steps (28). Like IRIS, there were 256 steps before 300 dpi. The effect of the screen is very detailed and beautiful. The dpi's half-tone hard spots have a rough sense, which means that you have to use 1200 dpi to match the 150 line halftone dot fineness. So now there is a very contradictory situation. In the case of color proofing, we must hard-spot or even draw some halftones to get closer to the printed matter; conversely, in order to pursue the effect of the photograph, each color point has a printed texture of the tone, which may be Digital printing is a more important development direction in the future.
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