unit v - importing and editing images

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    Lessons 1 6

    MARLON L. LALAGUNATLE ICT Teacher

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    Before you can work on an image in Photoshop whether youre creating a brand new document or

    opening an image from a disk, you must first loadthe image into an image window. Here are four basicways to create an image window:

    File New : After you fill out the desired sizeand resolution specifications in the New dialogbox, Photoshop confronts you with white andempty canvas.

    Lesson 1 Importing Images

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    File Open : Open an image saved to hard diskor CD-ROM by choosing Open from File menu.

    Edit Paste : Photoshop automatically adapts anew image window to the contents of theClipboard. This will allow you to copy an imageinside a different application or in Photoshop.

    File Import : if you own a scanner or digitalcamera, it may include a plug-in module that letsyou transfer an image directly into Photoshop.

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    Lesson 2 Using Crop, Stamp andHealing Tools

    1. Click Crop tool from

    the toolbox.2. Drag to select the area

    you want to keep.3. Press Enter to crop.

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    1. Click Clone stamptool from the toolbox.

    2. Press Alt key to setthe target.

    3. Drag to create theclone effect.

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    1. Click Pattern stamptool from the toolbox.

    2. Press Alt key to setthe target.

    3. Drag to create thepattern clone effect.

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    Sample output using Healing Brush Tool

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    Color Mappingis just a fancy way for shufflingcolors around. For example, to map color A to color

    B simply means to take all A-colored pixels andconvert them to B-colored pixels.

    Photoshop provides several commands that enableyou to map entire ranges of colors based on their

    hues, saturation, levels, and most frequently,brightness values.

    Lesson 3 Changing the Color Properties ofthe Image

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    A color mode determines the color model used todisplay and print images. Photoshop bases its color

    modes on established models for describing andreproducing color. Common models include HSB(hue, saturation, brightness); RGB (red, green, blue);CMYK (cyan, magenta, yellow, black); and CIE

    L*a*b*.

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    Hueis the color reflected from or transmitted

    through an object. It is measured as a location on the

    standard color wheel, expressed as a degree between0 and 360. In common use, hue is identified by thename of the color such as red, orange, or green.

    Saturation, sometimes called chroma, is the strengthor purity of the color. Saturation represents the

    amount of gray in proportion to the hue, measuredas a percentage from 0% (gray) to 100% (fullysaturated). On the standard color wheel, saturationincreases from the center to the edge.

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    Brightnessis the relative lightness or darkness of thecolor, usually measured as a percentage from 0%

    (black) to 100% (white).Contrast is defined as the separation between the

    darkest and brightest areas of the image. Increasecontrast and you increase the separation between

    dark and bright, making shadows darker andhighlights brighter. Decrease contrast and you bringthe shadows up and the highlights down to makethem closer to one another.

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    Choose the Foreground and Background Colors

    In Photoshop the background color is black, bydefault, to paint, fill and apply border to a selection.The background color is white, by default, to makegradient fills and fill in areas of an image that have

    been erased. The foreground and background colorsmay be changed using the Color palette, the Swatchespalette, the Color Picker, or the Eyedropper Tool

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    Ways of Choosing Foreground and Background

    Color Using the Color Palette

    Using the Swatches Palette

    Using the Color Picker

    Using the Eyedropper Tool

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    Simply put, the Dodge tool lightens the pixels you paint, and

    the Burntool darkens the pixels you paint. Its not entirelydifferent from using Levels or Curves. Sponge tool saturates or

    desaturates the pixels where you paint. The difference is that you are not applying the changes to the

    entire image; youre applying them only to the places you paintwith the brushes. Think of it as a way of selectively adjustingthe brightness or darkness of your image.

    You can use these tools to improve your images in several

    different ways:1. To improve the exposure of your photo and bring out detail2. To direct your viewers attention through creative use of

    highlights and shadows3. To create impact by adding dramatic highlights and shadows

    Lesson 4 Using Dodge,Burn and Sponge Tool

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    1. Select the Dodge/Burntool from the toolbox.

    2. Start adjusting theexposure of your image.

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    Blur- blurs the area where you paint.

    Sharpen - increases contrast in the areas where you

    paint. Smudge - blends the pixels where you paint

    simulating the action of dragging a finger throughwet paint.

    Lesson 5 Using Blur,Sharpen and Smudge Tool

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    Blurring can also create creativeeffects to a photo. It sounds ironic,but too much sharpness can be toomuch of a good thing. This is true

    especially if a sharp backgrounddistracts viewers from your real,

    intended subject.

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    The Smudge tool simulates theactions of dragging a finger throughwet paint. The tool picks up colorwhere the stroke begins and pushes itin the direction you drag. You cansmudge existing colors in your image,or smear foreground color on the

    image.

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    There are two ways to createAdjustment Layers:

    The Layer menu. You can createan adjustment layer by choosingan adjustment layer type from theNew Adjustment Layer submenu(under the Layer menu).

    Lesson 6 Adjusting Colors

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    The Layers palette icon. You can

    choose an adjustment layer type by

    clicking on the Layers palettesNew Content Layer icon

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    Levels

    This is ideal for most color corrections, enables you to

    adjust the darkest values, lightest values and midrangecolors for the entire selection.

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    Curves

    This is great for creating

    special effects and correctingimages beyond the help of theLevel command. Using this,you can map every brightnessvalue in every color channels.

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    Color Balance

    The Color Balance command changes the overall mixtureof colors in an image for generalized color correction.

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    Brightness and Contrast The Brightness/Contrast

    adjustment lets you make

    simple adjustments to the tonalrange of an image. Moving thebrightness slider to the rightincreases tonal values andexpands image highlights, to theleft decreases values and

    expands shadows. The contrastslider expands or shrinks theoverall range of tonal values inthe image

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    Hue and Saturation

    Hue/Saturation lets you adjustthe hue, saturation, and

    lightness of a specific range ofcolors in an image orsimultaneously adjust all thecolors in an image. Thisadjustment is especially goodfor fine-tuning colors in a

    CMYK image so that they are inthe gamut of an output device.