Hue Hue is the name of a distinct color of the spectrumred,
green, yellow, orange, blue, etc. It refers to the particular
wavelength frequency. Click each circle to learn more. The petals
have a red hue. The leaves have a green hue. The stamens have a
yellow hue.
Slide 3
Click the blue box next to the picture with a hue problem. Now
lets see if you can identify hue problems in photos. Which of the
two pictures below has more of a hue problem? Not quite. Notice the
unnatural red hue of the other photo. Correct! This photo has an
unnatural red hue. Hue problems are common in older photos, and
they can be corrected.
Slide 4
Adjusting Hue You can adjust hue in Photoshop by following
these steps: 1.Choose Layer > New Adjustment Layer >
Hue/Saturation. 2.Click OK in the New Layer dialog box. This
creates a new layer for your hue adjustments and doesnt discard the
original photo information. The two color bars at the bottom of the
dialog box represent the colors in their order on the color wheel.
The upper color bar shows the color before the adjustment; the
lower bar shows how the adjustment affects all of the hues at full
saturation.
Slide 5
- Hue Adjusting Hue Hue + Click the blue arrows below to adjust
the images hue using the Hue/Saturation tool. Hue has been
subtracted. Hue has been added.
Slide 6
This photo needs color retouching. Youll need to adjust the
hue. Click here to adjust the photo in Photoshop. Click here to
compare your work. Hue adjusted with the Hue/Saturation tool.
Slide 7
SATURATION Saturation is the intensity of color.
Slide 8
Saturation refers to the amount of white light mixed with the
color. Click the boxes below to learn more about the types of
saturation. Saturation Fully saturated colors are very rich and
bright. Less saturated colors are more pale and pastel.
Slide 9
Click the blue box next to the picture with a saturation
problem. Now lets see if you can identify saturation problems.
Which of the two pictures below has more of a saturation problem?
Correct! This photo is less saturated and has paler colors than the
one on the right. Not quite. Notice how pale the colors of the
other photo are compared to this one.
Slide 10
Adjusting Saturation You adjust saturation in Photoshop in the
same place we went to adjust hue: 1.Choose Layer > New
Adjustment Layer > Hue/Saturation. 2.Click OK in the New Layer
dialog box. Enter a value or drag the slider to the right to
increase the saturation or to the left to decrease it. The color
shifts away from or toward the center of the color wheel. Values
can range from 100 (percentage of desaturation, duller colors) to
+100 (percentage of saturation increase).
Slide 11
- Saturation Adjusting Saturation Saturation + Click the blue
arrows below to adjust the images saturation using the
Hue/Saturation tool. Saturation has been subtracted. Saturation has
been added.
Slide 12
This photo needs color retouching. Youll need to adjust the
saturation. Click here to adjust the photo in Photoshop. Click here
to compare your work. Saturation adjusted with the Hue/Saturation
tool.
Slide 13
This photo needs color retouching. This time youll need to
adjust hue and saturation. Click here to adjust the photo in
Photoshop. Click here to compare your work. Hue and saturation
adjusted with Hue/Saturation tool.
Slide 14
VALUE Value describes how bright a color is.
Slide 15
White has the highest value possible, black the lowest. Value
is defined as: The lights and darks of your picture, ignoring
saturation and hue of your colors. A grayscale photograph just
captures the values of the photographed object, but not saturation
and hue. Value is sometimes really hard to see, since differences
in hue and saturation can obscure a sameness in value. Take a look
at the middle stripe of the image it has the same value than the
gray stripes, but its saturation shifts from no saturation a the
black end to maximum saturation in the middle back to no saturation
in the white end.
Slide 16
Value can be difficult to determine in a color photograph. In
many instances contrast will be mistaken for strong value. Red and
green are contrasting colors but the color photo of the rose does
not have dynamic color. Notice when the photo is converted to black
and white the reds and greens appear to be the same shade of gray
or equal VALUE.
Slide 17
This photograph has value problems. What value range is this
photo in? Incorrect. Try again. Correct! The brightest areas in the
photograph are a mid-tone gray. LowMediumHigh
Slide 18
This photograph has value problems. What value range is this
photo in? Incorrect. Try again. LowMediumHigh Correct! The darkest
areas in the photograph are a mid-tone gray.
Slide 19
Contrast refers to differences in values and hues. Contrast
creates visual excitement and add interest to an image. If all the
images values or hues are the same, the result is monotonous and
unexciting. Contrast
Slide 20
Value contrast is most evident when black is next to white, and
when light values from one end of the gray scale are next to dark
values from the other end. A black and white photograph is readable
because of gray value contrasts.
Slide 21
Contrast in hue intensity occurs when a pure, fully intense
color is next to a muted or grayed color mixture. The pure colors
strength and intensity seem to cause it to glow.
Slide 22
Click the blue box next to the picture with a contrast problem.
Now lets see if you can identify contrast problems. Which image
below has a contrast problem? Correct! This image shows minimal
differences in color values. Not quite. This image is a good
example of contrast because of the vast differences in color
values.
Slide 23
Adjusting Contrast You adjust contrast in Photoshop using the
Levels tool in Photoshop: 1.Choose Layer > New Adjustment Layer
> Levels. 2.Click OK in the New Layer dialog box. With the
Levels tool youll use a histogram to make adjustments. On the left
of the histogram are black values, and on the right of the
histogram are white values. In the middle are grey values. The
histogram has a range of 256 values. In a low contrast image the
value range has fewer values. Notice on the right and left sides
there are missing values (more so on the right than left). To
adjust the Levels of an image and increase its contrast, youll want
to adjust the white values by sliding the white slider arrow until
you reach the point of the histogram where white values begin.
Then, adjust the black values by sliding the black slider arrow
until you reach the point of the histogram where black values
begin.
Slide 24
Adjusting Contrast Click the blue arrows below to adjust the
images contrast using the Levels tool. Whites have been subtracted.
Blacks have been subtracted.
Slide 25
This photo needs color retouching. Youll need to adjust the
contrast. Click here to adjust the photo in Photoshop. Click here
to compare your work. Contrast adjusted with the Levels tool.
Slide 26
So far, you have learned how to correct hue and saturation
using the Hue/Saturation adjustment palette and how to correct
contrast in value and hue using the Levels palette. You will now
learn how to adjust value using the Curves palette. You can adjust
the value and color of an image by changing the shape of the curve
in the Curves adjustment. Moving the curve upward or downward
lightens or darkens the image, depending on whether youve set
Curves to display levels or percentages. The steeper sections of
the curve represent areas of higher contrast & flatter sections
represent areas of lower contrast.
Slide 27
Quick overview of the Curves palette using a Curves adjustment
layer. Click on a highlight to learn the palette. On image
adjustment tool. Sample in picture to set black point. Sample in
picture to set gray point. Sample in picture to set white point.
Edit points to modify the curve. Draw to modify the curve. Curves
type drop-down menu. Curves color mode. Automatically adjust
curves. White point. Gray point. Black point.
Slide 28
Open original file. Notice how the picture has equal value and
appears gray. Click on the step to learn how to adjust value and
hue in Curves. Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Click on
the Curves icon in the Adjustments panel. Adjust the white point to
lighten the light areas, and adjust the black point to darken the
dark areas. Click on the return button and repeat step 2 to add a
new adjustment layer. The picture has more value, but the overall
picture has a blue hue. Change the mode drop-down menu to blue and
click on the gray point line and drag the blue channel to adjust
the hue. Now you may save your picture and continue working.
OriginalRepaired
Slide 29
As we discussed, this photo has a low value range. The photo
was corrected by adjusting the white point to brighten the picture
and by adding two gray points to adjust midlevel tones.
Slide 30
We identified that this photo has a high value range. The photo
was corrected by sliding the black point to increase the level of
black to the picture.
Slide 31
This photo needs color retouching. Would you adjust hue,
saturation or value? Click here to adjust the photo in Photoshop.
Click here to compare your work. This photo required more than one
color adjustment tool! Value adjusted with CurvesBrightness
adjusted with Saturation
Slide 32
This photo needs color retouching. Would you adjust hue,
saturation or value? Click here to adjust the photo in Photoshop.
Click here to compare your work. Curves applied to create contrast
after saturation. Notice only the green & blue channels were
adjusted. This photo required more than one color adjustment tool!
Saturation had to be applied before curves to this picture.
Slide 33
This photo needs color retouching. Would you adjust hue,
saturation or value? Click here to adjust the photo in Photoshop.
Click here to compare your work. Saturation made the sky look
unnatural. This photo required only the Levels adjustment palette.
Levels was applied to brighten the highlights. Curves lightened the
values too much.
Slide 34
As you have noticed throughout this lesson, there is not a
precise formula to making color corrections in Photoshop. The
ability to understand color and to identify a faulted photograph is
the first step to repairing photos. Adjusting color using the
methods described in this lesson requires experimentation and
understanding the limitations and functions of the tools, so dont
be afraid to mix it up!
Slide 35
Congratulations! You have completed a course in adjusting color
using Hue, Saturation, Levels & Curves in Photoshop.