Curves, Curves, Everywhere Curves
Around every curve in the road you are liable to come across another imaging application that contains some implementation of our current topic at hand.
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5 Simple Composition Tricks for a Fantastic Photo
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Curves to Create A Metallic Look
This tutorial describes how to create a metallic effect using Curves in Photoshop. I learned the technique from the book Photoshop 7 Down & Dirty Tricks by Scott Kelby.
PDF version Curves
The first post-processing lesson was about manipulating tonal range and balance through the levels control. With Levels, you can change the black point, white point, and midpoint (aka gamma).
Curves are a Filter
Think of a curve as a filter that modifies an image by changing the pixel values that make up an image.
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The Curves Dialog Box
Figure 3: Curves Dialog Box
Figure 3 shows the Curves dialog box. At the top of the dialog box is the Channel pop-up. This allows the photographer to choose whether to edit the RGB channel or one of the three individual color channels (i.e., red, green, or blue).
Text And Photography By George Jardine Published in Advanced Camera Technique
Figures 6-3a & 6-3b: ...
Digital Learning Curves Revisited
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As technology changes, we have to change. We are constantly updating information to our readers so that you will be well-informed and prepared to make good choices as you continue to explore your "Digital Learning Curve." ...
Trigradient Control Curves As stated previously, the trigradient tone reproduction method is based on three tone-control curves (or printer curves): high contrast, medium contrast, and low contrast.
Lesson 9 - ‘S' Curves
Another dynamic composition tool is to include a "S" curve. As the name suggests, a major element of the composition would be an object such as a stream, path, railing, or other curved object that creates an "S." ...
Allows you to control your color changes precisely and from the entire tonal spectrum. The Curves tool also allows you to preview changes as you make them, as well as view the changes to the ink values in the Info palette at the same time.
This is a little more complex. This is better if you have an image with bright highlights and want to bring up the shadows in exchange for flattening the highlights a little.
Curves: Derived from “Transfer Curve', Curves refers to a graph describing the relationship of the Output (on the vertical, or “Y' axis) and the Input (on the horizontal, or “X' axis).
A powerful tonal adjustment function found in some scanner drivers and image optimisation programs.
Apply in adjustment layers. Use masks if needed.
S-Curves or Shapes: I use shapes as a more relaxed casual way to lead your eye through the composition. A road, a stream, or even the shape of the ground or grasses in front of you can do this very well.
Using Curves to Correct Color
Pick a point right in the center of the curve line and pull it down a bit to darken the image. Now stare at the image until your eyes are about to bulge out (just kidding - kids, don't try this at home) and see if you can see any color imbalances.
Using Curves Adjustment Layers and Masking
The third D&B method involves Curves Adjustment Layers.
A term for an adjustment available on certain scanners. Beginning as a 45° angle line running up to the right, this line is adjusted into a curve shape by the user to effect colour or tone correction.
Curves Adjustment Layer
The next step is to create a new curves adjustment layer. The aim is to fine tune the faded effect. So off to 'Adjustments' and this time select a curves adjustment layer. Again, start out from the shadow areas, tweak them up a bit. Manni keeps an output to about 36-40%.
Curves is the best method for adding and subtracting brightness or contrast, and for the first time a modified version of this big gun from Photoshop appears in Elements.
Find Color Curves under Enhance
Adjust Color ...
Curves can usually be applied to all channels together in an image, or to each channel individually.
Curves and Levels are the perhaps the most basic Photoshop adjustments because they address image fundamentals: brightness, contrast, and color.
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A short video showing how to use the curves adjustment to control contrast.
Curves, name it "General Curves", and choose Linear Contrast from the dropdown menu on the Adjustments Panel. It will increase the general contrast a little.
Finally, let's add a black border: Go to Image ...
The curves and spirals are reminiscent of the Guggenheim Museum in New York and the
Greek Orthodox Church in Milwaukee. The waves of arched windows recall the Marin County
building in California. Ceiling bowls are used to cover the lighting and, when seen next ...
Tone curves can be adjusted for each color channel separately. The lens aberration window offers correction of light fall-off, chromatic aberration, distortion and color blur.
Distortion correction in Digital Photo Professional
Out-of-camera JPEG After distortion correction in DPP ...
Bézier curves are used in GIMP as component parts of Paths.
The image above shows a Bézier curve. Points P0 and P3 are points on the Path, which are created by clicking with the mouse. Points P1 and P2 are handles, which are automatically created by GIMP when you stretch the line.
D-Log E CURVES
The development times recommended by Jacobson and Jacobson (1972) for the Stoeckler two-bath developer are for an earlier generation of films, and the same development times are repeated by Anchell (1994) and Anchell and Troop (1999).
Lines and curves present in your photo, whether in the subject itself or in the area leading to the subject, lend a pleasing aesthetic quality to the scene. As in the rule of thirds, the eye is naturally drawn to asymmetry, following the lines and curves to examine the scene.
Levels and curves can be used in conjunction with black and white conversion to provide further control over tones and contrast.
the 20 lp/mm curves (violett):
>45% for the corner
>80% for the center.
the 10 lp/mm curves (green) should be very close to the 5 lp/mm curve (blue).
the 5 lp/mm curves (blue) should stay >95% for the whole X-axis.
The SX240 HS's curves are more shapely than those of its predecessor which had a kind of raised belt around its perimeter. It's an elegant design which is also practical: it's comfortable to hold in the hand thanks to a vertical finger grip on the front panel.
Raindrops, Lines, Curves, Form
Photo Credit: Stephen J. Kristof
Abstract - Reflection, Water Droplets
Photo Credit: Kevan Donais ...
Curves: Curves is used to adjust brightness and contrast of each tone separately.
Levels: Similar to brightness and contrast control, except it allows the user to adjust highlight, shadow, and mid-tone areas separately as well as colors through channels.
Custom tone curves. If you're shopping for a high-end SLR, keep an eye out for the ability to customize the camera's tone curves. This gives you more control over the camera's contrast and color response when shooting in JPEG mode.
A curves adjustment layer lets me darken the original image, dropping the overall RGB values just below the midpoint. I don’t tend to use more than one point on this layer. I then mask out areas on this layer to retain the brightness in the centre of the image.
Concave Glass - Concave surface glass is glass that curves inward, as though you are looking into a bowl. If faced with this type of surface you'll actually want to be in the center of the curve and facing directly at the glass to avoid reflection.
Commonly found along country roads, on footpaths through a forest, and along a meandering river, look for S curves that start along the bottom of the frame and lead the eye through the scene. Position the line so it flows through the image in a graceful and fluid manner.
We all remember our geometry classes, dominated by circles, triangles, and snake-like curves. Applying these simple shapes to your subject matter can help to simplify complex scenes and add visual interest. Consider trying to capture an image of a person walking down a long, straight street.
I’ve found that Lightroom can do all that Photo Mechanic can do in terms of culling, renaming and adding IPTC applications in its "Library" module, and it also has a "Develop" module with a quick and intuitive nondestructive interface that allows you to apply many of the same levels, curves, ...
As you can see, the super-compact Casio's image is quite a bit grainier, to the point where you can't see much of the details of my face (such as, say, the bumps and curves of my ears, or the whites of my eyes, which are much easier to make out on the older picture - well, ...
If both mosaics cover an area of the same size, the one created using small tiles has more tiles so it has sharper curves and more detail.
If there are the same number of large and small tiles, the area covered by the small tiles is smaller.
In Photoshop, opening an Adjustment Layer in Curves is the classic approach but you can also reduce contrast in the RAW converter by adjusting the Exposure, Shadows, Brightness, and Contrast sliders.
Image Trends has introduced the Fisheye-Hemi plug-in to correct the full-frame fish-eye lens curves in a different way. Basically, most standard software corrections use what are called rectilinear mapping techniques.
S-curves will increase contrast (in this case color contrast = saturation). We are not going to touch the Lightness Channel (L) and therefore we are not changing the brightness or sharpness of the picture.
A subtle adjustment like this will make your colors really pop (see results below).
Unfortunately, OptiCAL's curves window isn't very accurate. You can only drag points, and you cannot enter specific numbers into the Input and Output fields. There is also no way to simply review the points to see what their values are.
Applying tonal or color adjustment such as levels or curves directly on a raster layer mathematically redefines the pixel data the moment you hit save. Adjustment layers allow you to preview those same changes without actually applying them to the pixel data.
Stairlike lines that appear where there should be smooth straight lines or curves. Jaggies can occur for a variety of reasons, the most common being that the output device (display monitor or printer) does not have enough resolution to portray a smooth line.
Next I'll bring in just a bit of highlight adjustment through the use of curves. For this image, I just want to bring out a bit of the highlights in the subject's face.
Review the basics themes of composition before a photoshoot: c and s curves, contrast, diagonal and horizontal line uses, subject matter, patterns, the way the eyes move throughout the picture when viewing it, aesthetics, texture, framing, taking an interesting photo and texture.
The human eye naturally follows lines and curves. Place your subject at the end of a road, fence, or naturally occurring line or curve to increase its impact.
The process by which smooth curves and lines that run diagonally across the screen of a low-resolution digital file take on a 'jagged' look as opposed to a smooth, natural rendition. Smoothing and anti-aliasing techniques can reduce the effect of aliasing.
Anti Shake ...
With diagonals, lines, curves, people's hand gestures and other elements that can be incorporated into the picture. The place where the eye finally settles is called the 'anchor'. Every good photo must have an anchor, otherwise the eye will wonder endlessly without a place to settle down.
Hands have very natural graceful curves. Accentuate this. Hands can be clinched and tense, especially in weddings. The hands can tell a lot about the stress of the person. Try and get them to relax the hands.
CONVEX LENS - A lens that curves outward, as if it is bulging.
CORRECTION - All lenses have aberrations (defects) to a degree. Minimizing them is known as correction. High-quality lenses have greater correction. The effect of their aberrations is less evident.
In Lightroom, I only did basic curves adjustments and reduced the red (-20) and orange (-30) saturation. Then in Photoshop, I used Topaz Adjust with the default portrait_drama setting to give it that extra pop. Topaz Labs are awesome! The best plugins I ever bought for Photoshop.
As printed typography enjoys the fruits of high-DPI glory, proudly displaying its beautiful curves and subtleties, its on-screen counterpart remains stifled by bulky pixels, living in a world of jagged edges, distorted letterforms and trimmed serifs.
Jaggies: The stair-stepping effect that can be seen in curves and diagonal lines when a picture's resolution is too low and individual pixels begin to show in the image.
JPEG: Joint Photographic Experts Group (see "Compression").
Steep death curves - they'll work fine and then suddenly run out of power unexpectedly. Most importantly, only the latest Canon Speedlites can use them. Older models are not compatible with lithium AA cells owing to power issues, and might be damaged by them.
Jaggies - Slang term for a low resolution digital image that contains sharp (jagged) curves, caused by the use of fewer, larger pixels.
Joint Photographic Experts Group - A graphic (image) file format that allows an image to be compressed for ease of storage and file-handling/processing.
A logical device used by creator applications to draw lines or curves or objects composed of them, having the properties of width, color, and possibly line style. An area in a file holding information used by a rendering application in reconstructing lines.
If the layout of your staircase is straight for the most part, but curves right at the top, you may be able to buy a straight stairlift plus a 'bridging platform' to enable the lift to reach the landing.
If a diagonal is too strident for the mood of the picture you can soften the effect by transforming diagonals into curves. An arc sweeping across the frame (Snell's window for instance) has the interest, life and motion of a diagonal without the harshness.
Aliasing. The jaggy edges that appear in bitmap images with curves or lines at any angle other than multiples of 90 degrees.
You can adjust curves and levels to a greater extent, then convert back to 8-bit data for printing. If you want to access all 12 bits of the original RAW file, you can convert to a 16-bit TIFF file. Why not a 12-bit TIFF file? Because there's no such thing! ...
Levels or Curves can further brighten up dull snow, but making sure to keep sunlight and bright clouds a little brighter than the snow. Of course like anything else, rules have exceptions, so experiment on your own and have fun with developing your own style of processing your images.
In a standard converging, or convex lens, one or both sides of the glass curves out. This means rays of light passing through will bend toward the center of the lens on entry.
No blacks or whites
Worst Lightroom mistakes: 5. Over-adjusted Curves
Worst Lightroom mistakes: 6. Over saturating colours
Worst Lightroom mistakes: 7. Over-use of selective colour
Worst Lightroom mistakes: 8. Over-sharpening ...
The background will probably be rather dark, but this can be quickly and easily rebalanced with ‘levels' or ‘curves' in most image programs. Sure it will increase noise in the background, but this is a lot less offensive than washing out your main subject.
Large, close, soft sources tend to envelop small subjects with light that Falls off gradually on the curves.
End-of-the-shoot celebration to reward the crew for their past efforts and future silence regarding what really happened on location.
Many photographers find their image seems dull after creating the HDR picture. Next, you need to open it in your photo editing program, for example Photoshop, and apply some adjustments like curves, shadow / highlight and sharpening.
Using something in the image to take the viewers eye through the picture to a point can make an image much more interesting. For instance, if you had a meandering river with a boat on it in the distance, using the curves of the river to take the eye into the picture to the boat can work really well.
Over the years, Adobe has made image editing programs like Photoshop and Camera Raw much more intuitive and easy to use so that it's not quite so intimidating for beginners to dive in, but one of the adjustments that still scares many first timers is Curves. Read more.
Like latex foam, memory foam’s ability to deliver both comfort and spinal support allow the foam to act as a support system in lieu of a traditional innerspring. Memory foam responds to your body temperature by softening under warmth, allowing the foam to shape properly to the curves of your ...
In the old darkroom days, the only choice the photographer had was to dodge or burn. With modern photo editing programs, however, he can use a Lasso selection set, and then apply Burn, Dodge, Brightness, Contrast, or even Levels and Curves adjustments, ...
Use your digital camera's thumbnail image and histogram to insure that you have proper exposure. If you must convert to 24 bit, make your final tweaks to image color and tone curve (levels or curves adjustments) in your RAW converter before you convert the RAW image to 24 bit color.
You can find designs that intentionally don't even try to correct distortions. These are called “fish-eye lenses', delivering not only very wide angles of view of about 180 degrees, but also extreme distortions. Straight lines of the original scene are rendered as strongly bent curves in the ...
Refers to elements in lenses which have been designed to compensate for distortion by having different curves on individual elements. Allows for a more compact lens. Astigmatism An optical defect that causes light rays from an off-axis point to form images at different positions.
See also: What is the meaning of Photograph, Light, Camera, Photography, Image?