manipulating digital image

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

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After

Image transformation

• Scale

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After

Image transformation

• Rotate

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After

Image transformation

• Rotate

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Image transformation

• Skew

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Image transformation

• Skew

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After

Image transformation

• Distort

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After

Image transformation

• Distort

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Image transformation

• Perspective

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Image transformation

• Perspective

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After

Image transformation

• Warp

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After

Image transformation

• Warp

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Image transformation

• Crop

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Image transformation

• Flip Horizontal

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Image transformation

• Flip Vertical

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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..