manipulating digital image
TRANSCRIPT
Manipulating Digital Image
Manipulating Digital Image
Visual Technology
Production
IMAGE TRANSFORMATIONhue and saturation
modifying image colormodifying image lighting
Image transformation
• Refers to the process of revising the structure of an object from various aspects such as perspective , size, angle of view and so on .
• Through this process , the uniformity of the images can be generated either from the size , view , lighting and so on in order to form a more perfect image
• This process also allows an object or image is placed at an angle or location needed in a more realistic situation and meet the requirements
• There are many type of image transformation like scale, rotate, skew, distort, perspective, warp and flip.
Image transformation
• Scale
Before
After
Image transformation
• Scale
Before
After
Image transformation
• Rotate
Before
After
Image transformation
• Rotate
Before
After
Image transformation
• Skew
Before
After
Image transformation
• Skew
Before
After
Image transformation
• Distort
Before
After
Image transformation
• Distort
Before
After
Image transformation
• Perspective
Before
After
Image transformation
• Perspective
Before
After
Image transformation
• Warp
Before
After
Image transformation
• Warp
Before
After
Image transformation
• Crop
Before
After
Image transformation
• Flip Horizontal
Before
After
Image transformation
• Flip Vertical
Before
After
MODIFYING IMAGE COLOR
What is modifying image color?
To change/ adjust/replace
certain colors in the image
Modifying image color in Photoshop
3 simple ways to change the color of an object in Photoshop:
Using the Color
Replacement Tool
Using the Selective
ColorUsing the Replace
Color
Using the Color
Replacement Tool
BACK
Using the Selective
Color
Using the Selective
Color
From this drop down menu, you can select the
color that you want to make a changes
Use the sliders below to change the Yellows in
your photograph.
When you change the sliders, you can see the changes affecting your
final photograph
Using the Selective
Color
BACK
Using the
Replace Color
Eyedropper tool (to select the image
you want to make change the color
This the original color,
Use the sliders to change the hue, sat. and lightness color in your selected image
To change the color, click here
Using the
Replace Color
USING HUE / SATURATION
What is hue and saturation?
HUE
The colour in the image
To adjust colors in an image that appears slightly out of phase or skewed toward
a color
What is the function of hue/saturation in Photoshop?
To create stylistic changes by dramatically changing colors
in an object
Example using hue/saturation in Photoshop…
ORIGINAL PICTURE
AFTER HUE/SAT. APPLIED
Example using hue/saturation in Photoshop…
ORIGINAL PICTURE
AFTER HUE/SAT. APPLIED
Hue/saturation in Photoshop
Hue/saturation in Photoshop
On-image adjustment tool
Hue slider
Saturation slider
Lightness slider
Eyedropper tool Colorize
Color bar
Hue/saturation in Photoshop
So… let practice guys.. Please open your Adobe Photoshop on your PC.. we do some hands on
activity..
MODIFYING IMAGE LIGHTING
Why we want to modify lighting?
To perceive certain period of a day
To trick people
To enhance the picture
AFTERBEFORE
Add lighting
• Using layer style> blend mode>screen
underexposed
What tool in photoshop we will use?
Image > adjustment> shadows/highlight curves level
Image > adjustment> shadows/highlight
curves level
Photoshop shadows/highlight tool
to fix a backlit photo - the light source is behind the object not in front of
Shadows/highlight
AfterBefore
Curves
Using the Curves tool in Photoshop gives you more control in editing photographs such as the brightness, contrast and tones
Curves tool before adjustment:
Curves tool after adjustment:
How to brighten or darken an image in Photoshop using the Curves Dialogue Box
BEFORE AFTER
BEFORE
AFTER
References
Jamalludin Harun dan Zaidatun Tasir (2003). Adobe Photoshop 7. Venton Publishing (M) Sdn Bhd. Kuala Lumpur..