get high-quality images of the three principles of the low: low-contrast 篇

why the low-contrast can be collected to moreMulti-Tone Information?

the highest brightness and contrast is the picture the difference between the minimum dark.The contrast looks gloomy appearance of small, high-contrast pictures of contrasts.Under normal circumstances we try to make photographs contrast the normal, close to human vision.It seems so simple, but behind the contrast is that we are most concerned about the level of contrast between the decision and restrict the level of reproduction.Contrast characteristic curve is different from the details of recording video transfer capabilities are also different.Beginning to see a number of high-end digital camera pictures are generally low contrast appear dark, I very much do not understand.Improve the contrast is a very easy thing to do, why not do the amendment being of people question it?Especially the use of low-cost, portable small digital cameras and high-end SLR cameras compared to low-cost digital camera photos, contrast and color are better than the professional SLR, it is difficult to understand.When we understand the record of the relationship between contrast and levels, they will understand the subtleties of the.

contrasts andtolerance of each other constraints, impact and dependency relationships.Much lower degree of tolerance may provide a contrast, and low contrast also be able to record more video transfer level.Tolerance in the manufacture of film when the already stereotyped, and users typically can not be changed, while the digital contrast can be adjusted, so tolerance can be adjusted.This gives us the contrast by adjusting the camera settings affect the level of detail of the record is once again providing a degree of convenience.

shown is a curve on a comparison chart.On the left is relatively steep contrast curve, recorded a relatively small degree of tolerance.Placed on the right side of the lower contrast curve, flat projection can be shown under the degree of tolerance.

Editor's note : By Xiaobian understanding, the author referred to "low contrast can be greater tolerance" is a relative concept, he was referring to the low contrast isdigital camera parameter settings the same low-contrast, does not apply to two different grades of the analogy between the digital camera.In fact, by changing the internal parameters of a digital camera to "increase" contrast, is sensitive data in the digital camera will be recorded as an image file by calculating the force to improve the process, similar to the later software processing, the process will lose the original information.

another: This picture due to low accuracy, only to indicate reference.

shown is my take on five different contrast settings with a screen shot.+2 Contrast this picture seem more vivid three-dimensional feeling stronger.In the picture I also put a 19 grayscale map.Gray level from the point of view, +2 level is less than -2.

can also see in this picture, high contrast can only be recorded to the five-level, low contrast can be recorded to the nine levels, from the image data can see that.Above, from the most low-contrast black-level data for 7 (RGB value, the same below), it is 8 or less, it still has the black levels.The same data in high-contrast screen has reached the fifth grade, following the merger of four to zero, in other words, high-contrast images in the dark shadow of the Ministry of transfer record less four levels, levels of less, as theshow.

yeslow-contrast photograph is not necessarily good?Low-contrast photos of another dark gray how to do?Through a simple Levels adjustment, with high-contrast photos look close, however, than high levels of contrast to be abundant (see above chart).Low-contrast photos after level adjustment, can achieve high contrast effect, but it is a high contrast level than the level to be rich, and the high contrast of the photos looked pretty bright, but the level of less.

thisphotos are placed in a Roman bronze, let us look bronze dark-level comparison.In density is basically the same circumstances, after the adjustments, the low contrast of the dark, more levels, and high level of low contrast screen, and a relatively slight color offset (reddish).High-contrast color images in fact has also been a certain influence.

Editor's note : In accordance with the understanding of authors here Xiaobian so-called "differences," it is the camera's internal image processor and the latter part of computer software (usually refers to Photoshop) between the treatment effectdifferences.Basically, by changing the parameters of digital cameras, the image effect of the changes embodied in, and later software processing is essentially the same, the so-called "good" and "bad" is different algorithms and calculation accuracy the effect of the difference.The author gives us examples of the tips is that by changing the camera parameters in advance, in the shooting session, it had already lost a number of image information, this information is found again come.

these two small doll's face, low-contrast levels of footage, hair inside the level of rich, colorful clothes, and pure, rich texture.Images shot with high contrast level of less hair, clothes, the colors looked a bit outmoded, texture cheaper.

is not to be set up with low-contrast pictures are taken?Not.As long as we grasp the principle of them, understanding the relationship between the contrast and levels, we can contrast the flexibility to call a variety of settings, with different contrast images to meet our needs.For example, to obtain contrasting images, it can in large contrast illumination environment, and then set the low contrast can also be in low contrast images in the photo set of high contrast, to obtain frequently contrast photos.There are a variety of combinations, in this non-listed 11.

high-contrast photographs

the direct use of high-contrast images of shooting first glance to be very good, if compared with the low-contrast images, the difference is very obvious.

you want to get more levels, there is no doubt that should choose a low-contrast film, low-contrast can record more video transfer, which is high-end digital camera images with low contrast, color dark side because.This is not a mistake, nor is it a digital camera is not good, but for more collection of information.Contrast the small screen can be adjusted through the post to the best state, and the high contrast images seems to have reached the best condition, but the lack of a level, while the level can only be obtained from the pre-shooting, there is no level of picture regardless of what kind of wonderfulside, do not get from the post.Trade-off between the two, digital imaging to obtain the low-contrast images are justified.

low-contrast shooting photos after adjustments

through the pieces of photos in front of comparison, you can see bronze high light levels, clothing color, gray scale levels of series such as the apparentimprovement.

able to make good use of contrast setting, the key in understanding the principles.Shooting through experiments of various kinds of different expressions of contrast, the actual shooting, set up a creative way, combined with other related adjustment settings (such as saturation, color temperature, exposure compensation, etc.), and ultimately achieve the maximization of the quality of pre-filming.Many digital cameras may not have the contrast adjustment, in fact, some digital camera's "shooting mode" can change the contrast, sharpness, saturation, the "standard model" of the contrast between the roughly neutral, "soft mode" in contrast to nearlylow-contrast, bright "landscape mode" is often high-contrast curve.

this excerpt from "Professional Digital Imaging Tutorial," a book:

This book is a comprehensive introduction pre-filming and post-processing of books, has 40 years of photographic experience from well-known digital imaging expertLiu Kuan New meticulously compiled.

the contents of the book is divided into 10 chapters.Main features include digital imaging and digital video concepts, the best pre-shoot digital photography skills, knowledge of the digital age colors and color management, digital photography two types of creative methods must be mastered by the latter part of the digital photography techniques and advanced post-processing techniques and digitalCreative Examples and advanced synthesis techniques.

For the convenience of the reader to study the book with a "digital color quickly identify the color wheel cards" can be used as the reader to study and application of color is a good helper.To facilitate the use of Photoshop-based readers of this book, but also specially equipped with a very practical "Photoshop Quick Guide", and in the CD-ROM with a complete set of Photoshop video tutorials.

the reader through the study of this book, you can deep understanding of the characteristics of digital cameras to deepen understanding of digital imaging, digital imaging master control skills to enhance their shooting and production levels, give full play to the hands of the advantages of digital cameras, access tohigh-quality digital images.

this book suitable for general photography professionals and amateur photographers to read for reference.


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