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Using Adobe Photoshop CS
Using Adobe Photoshop CS
Table of contents
Table of contents
Basic concepts
Basic concepts
What is Photoshop
What is Photoshop
Other options
Other options
Types of image files 1
Types of image files 1
Types of image files 2
Types of image files 2
Color modes
Color modes
The Photoshop workspace
The Photoshop workspace
The toolbox
The toolbox
The options palette
The options palette
The palettes
The palettes
Basic photo manipulation
Basic photo manipulation
Opening an image: the file browser
Opening an image: the file browser
The File browser
The File browser
Cropping an image 1
Cropping an image 1
Cropping an image 2
Cropping an image 2
Resizing an image 1
Resizing an image 1
Resizing an image 2
Resizing an image 2
Resizing an image 3
Resizing an image 3
Saving images 1
Saving images 1
Saving images 2
Saving images 2
Save for Web dialogue box 1
Save for Web dialogue box 1
Save for Web dialogue box 2
Save for Web dialogue box 2
Saving
Saving
Creating new images
Creating new images
New image dialogue box
New image dialogue box
The pencil and paintbrush tools
The pencil and paintbrush tools
The color picker 1
The color picker 1
The color picker 2
The color picker 2
The paintbucket tool 1
The paintbucket tool 1
The paintbucket tool 2
The paintbucket tool 2
The gradient tool
The gradient tool
Custom gradients
Custom gradients
Saving
Saving
Saving gifs: dither
Saving gifs: dither
Adjusting and retouching photos
Adjusting and retouching photos
Rotation
Rotation
Adjustments 1
Adjustments 1
Adjustments 2
Adjustments 2
Dodge/burn/sponge tools
Dodge/burn/sponge tools
The clone tool 1
The clone tool 1
The clone tool 2
The clone tool 2
Filters 1
Filters 1
Filters 2
Filters 2
Transparency
Transparency
Creating transparent backgrounds 1
Creating transparent backgrounds 1
Creating transparent backgrounds 2
Creating transparent backgrounds 2
Saving
Saving
Transparency dither example
Transparency dither example
Layers
Layers
Layer basics 1
Layer basics 1
Layer basics 2
Layer basics 2
Layer basics 3
Layer basics 3
Compositing two images 1
Compositing two images 1
Compositing two images 2
Compositing two images 2
Transforming layers
Transforming layers
Layer via copy or cut
Layer via copy or cut
Adding text
Adding text
Character palette
Character palette
Other resources
Other resources

Презентация: «Using Adobe Photoshop CS». Автор: Jeffrey Z Wood. Файл: «Using Adobe Photoshop CS.ppt». Размер zip-архива: 552 КБ.

Using Adobe Photoshop CS

содержание презентации «Using Adobe Photoshop CS.ppt»
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1 Using Adobe Photoshop CS

Using Adobe Photoshop CS

Image Editing software

1

2 Table of contents

Table of contents

2

Basic concepts………………....................…….................…slide 3 What is Photoshop?, other options, types of image files, The Photoshop workspace (toolbox, options bar, palettes) Basic photo manipulation …....................………………..….slide 13 Opening, cropping, resizing, saving as .jpeg Creating new images………………....................…..……….slide 26 New image dialogue box, pencil and paintbrush tools, paintbucket and gradient tools, saving as .gifs, dither Adjusting/retouching photos……....................……………..slide 37 Rotation, adjustments, the dodge-burn-sponge tools, the clone tool, the filters menu Transparency……………....................……..........................slide 46 Creating transparent backgrounds, saving transparent images, transparency dither Layers……………………………....................…………..…..slide 51 Layer basics, moving layers, naming layers, copying layers, compositing images, transforming layers, layer via copy/cut, adding text Other resources……………….............................................slide 61

3 Basic concepts

Basic concepts

What is Photoshop?, other options, types of image files, The Photoshop workspace (toolbox, options bar, palettes)

3

4 What is Photoshop

What is Photoshop

4

Image editing program Shows images as bitmaps Bitmap = arrangement of dots (pixels) on grid Don’t confuse bitmap with file type called .bmp - just a descriptive term Pixel = “Picture element” - smallest unit of an image Size of pixel depends on resolution Typical web image: 72 dpi Typical print image: 300 dpi or hgher End result can be saved in variety of ways: .bmp, .jpeg, .gif, .tif

5 Other options

Other options

5

Adobe Elements (basic, cheaper version of PShop) - $79 Corel Paintshop Pro - $79 (similar to Elements) MS Photodraw/ PhotoEditor – often free Software that comes with digital camera

6 Types of image files 1

Types of image files 1

6

.psd Native Photoshop file, usually needs to be saved as other type New images, layered images start as .psd .gif Good for web, used for simple images, large eras of flat color Often good for B & W Supports transparency Lossless .jpeg Good for web, used for photos or complex coloration (e.g. – gradients) Slightly longer to download (decompression time) Lossy Doesn’t support transparency

7 Types of image files 2

Types of image files 2

7

.png Good for web, best of both worlds (lossless, supports complex photographs) Not supported by older browsers (pre IE 4, NN 6) Wait for all browsers to catch up before using .tif Good for print media Can be imported by most apps (QuarkX, Pagemaker, InDesign) Large file sizes (but compressible) Can supports layers .bmp Simple grid of pixels Uncompressed, large file sizes Can be imported by almost all apps

8 Color modes

Color modes

8

Image, Modes RGB is almost always best bet Default choice CMYK for high end professional printers Grayscale for B&W Index greatly reduces file size IMPORTANT: If Photoshop is not allowing you to use a tool, change mode from index to RGB 8-bit is usually adequate It’s per channel, so you’re actually talking about 24 bit image in RGB mode 16-bit only for very high resolution pictures Very large file size

9 The Photoshop workspace

The Photoshop workspace

9

Options palette

image

10 The toolbox

The toolbox

10

Commonly used tools arranged as icons Triangle in lower right means multiple tools are nested there Left-click the icon and hold down the button to see all tools nested there

Expanded: Gradient and paintbucket tools

Paintbucket icon

11 The options palette

The options palette

11

Just below the Menu choices Changes depending on which tool you’ve chosen from the toolbox Allows greater control of that tool by changing settings

Options palette for paintbucket tool

12 The palettes

The palettes

12

19 palettes available from the Windows menu Only need a few up all the time Toolbox (already discussed) Options (already discussed) Layers One of the main reasons Photoshop is so versatile Layer images on top of other images – mix text, photos, shapes by superimposing them History Ctrl + Z only works for the last thing you did History palette lets you go “back in time” step by step - particularly useful when you’re first learning Photoshop, so you can back out of a bad decision Pull up others (e.g. Character for text, Styles for special effects) as needed

13 Basic photo manipulation

Basic photo manipulation

Opening, cropping, resizing, saving as .jpeg

13

14 Opening an image: the file browser

Opening an image: the file browser

14

If you know exact name of file… File, Open Web sites often have huge numbers of images 1 images folder – gets bigger and bigger For large libraries of images, or non-descriptive file names… Window, File browser Gives thumbnail of every picture in folder Allows fast ways to browse, sort, flag, rotate, delete, etc.

15 The File browser

The File browser

15

Rotate

Flag

Search

Delete

Folder browser

Thumbnails

Metadata

16 Cropping an image 1

Cropping an image 1

16

Bring up image File, Open (if you know the name of file) Window, File Browser (to see thumbnails of all images in a folder) Choose cropping tool Left-click and drag to define crop area Uncropped area will be shaded Don’t have to be perfect Use sizing boxes to fine-tune crop area

17 Cropping an image 2

Cropping an image 2

17

When you’re happy with crop, double-click inside it Cursor will change to solid black triangle The cropped image will be displayed Rename the image (so you don’t overwrite original image) and save it AFTER you’ve saved it, when Photoshop asks if you want to save changes, say “no” (it’s counter-intuitive, but you’ve already saved a version of your image) We’ll discuss save options in a few minutes

18 Resizing an image 1

Resizing an image 1

18

For web: smaller image = smaller file size = faster download time Also lower file size by compressing when saving Web images are measured in pixels Actual size depends on resolution Design with 800 x 600 in mind 640 x 480 (1%)* 800 x 600 (29%)* 1024 x 768 and higher (68%)* Your specific audience might skew higher or lower

*these numbers are notoriously hard to track accurately

19 Resizing an image 2

Resizing an image 2

19

Images will not necessarily be shown actual size in Photoshop Look at title bar to see percentage Ctrl and + to zoom in Ctrl and – to zoom out Magnifying glass in toolbar does this too (more cumbersome, but good for zooming in on the specific area you click) View menu, Actual Pixels will also take you to 100%

20 Resizing an image 3

Resizing an image 3

20

Image menu, Image Size Make sure “Constrain proportions” is checked to avoid stretching Link icon appears Change width (in pixels), height will automatically change Use document size box for print (set in inches, not pixels) Save as new file name, so as not to overwrite original image

21 Saving images 1

Saving images 1

21

General rule: Photos, complex images save as .jpegs Cartoonish images with large areas of flat color save as .gifs Many exceptions, so try both options and compare side by side (using 2-up or 4-up) .png is not supported by all browsers, so try to avoid Transparency supported by .gif, but not .jpeg Goal is to find a compromise between file size and image quality Lower file size = lower image quality

22 Saving images 2

Saving images 2

22

After you’ve cropped, resized, adjusted File, Save for web ImageReady is another option (icon at bottom of toolbox) IR doesn’t help that much with simple images (use for animation, links, rollovers – web specific tasks) Dialogue box appears Choose 4-Up tab at top

23 Save for Web dialogue box 1

Save for Web dialogue box 1

23

4 versions of picture Allows side-by-side comparison of different settings Use these controls to change settings

24 Save for Web dialogue box 2

Save for Web dialogue box 2

24

Ctrl and + or – will allow you to zoom in or out L-Click and drag allows you to drag image around Download time under all 4 versions: CRUCIAL piece of info

25 Saving

Saving

jpegs

25

Use this pulldown to switch between jpeg and gif Use this slider to adjust quality Higher quality = larger file size Often get by with 15-20 for web use Zoom in and drag around to look for “artifacts” Little blemishes caused by compression process, often in areas of flat color Adding a little blur with this slider sometimes masks artifacts or poor image quality Don’t overdo it!

26 Creating new images

Creating new images

New image dialogue box, pencil and paintbrush tools, paintbucket and gradient tools, saving as .gifs, dither

26

27 New image dialogue box

New image dialogue box

27

Width, height in pixels, inches, cm, etc. Resolution: 72 ppi for web work,300 or higher for print Color mode: RGB best default, grayscale for B&W, CMYK for high-end print work Background content: transparent for gifs only, background color needs to be set beforehand

28 The pencil and paintbrush tools

The pencil and paintbrush tools

28

Left-click and hold down icon to choose Pencil has hard edges Brush has feathered edges Brush pulldown in options bar controls diameter, hardness Brush palette has presets for stars, leaves, grass, etc.

29 The color picker 1

The color picker 1

29

On toolbox Flips background and foreground Foreground color picker Background color picker Default (in this case B&W) Click background or foreground to bring up color picker

30 The color picker 2

The color picker 2

30

Color slider Color field Field/slider combo gives you access to all colors Numeric color values Web safe colors option (important!) You can sample colors with the CP eyedropper

31 The paintbucket tool 1

The paintbucket tool 1

31

Left-click and hold down to choose between paintbucket and gradient Paintbucket is for solid fill backgrounds and patterns Solid fill – choose color from options bar Patterns – lots to chose from: cloth and paper textures, nature images (rocks, flowers), abstract patterns Select proper layer, choose paintbucket, click on area to fill Can’t paint a background – change to layer first Tolerance and opacity on options bar

32 The paintbucket tool 2

The paintbucket tool 2

32

For patterned backgrounds Change Fill box from Foreground to Pattern in options bar Use Pattern box pulldown to see patterns to use Use this button to bring up more pattern choices Select your pattern, choose layer, click on image

33 The gradient tool

The gradient tool

33

Gradient = gradual transition between two or more colors Choose gradient tool, choose preset from options bar “Draw” gradient with a left click and drag Starting and stopping points and direction of dragged line will define gradient Use History panel to back up, try again Click on Gradient box in toolbar to create own gradient

34 Custom gradients

Custom gradients

34

Preset gradients are here Click on these boxes to change opacity (for a fade to transparency) Click on these to change color of gradient Slide them to change when gradient ends This changes midpoint of transition

35 Saving

Saving

gifs 1

35

File, Save for web, 4-Up tab (just like .jpegs) Can have between 2 and 256 colors More colors = larger file size Control # of colors with this pulldown

36 Saving gifs: dither

Saving gifs: dither

36

Dither diffuses color boundaries by mixing pixels together Good for preventing “banding” in gradients and shading Turn it on using this pulldown (diffusion is usually best bet) Set amount of dither, from 0 to 100 Don’t overdo it – can create graininess

37 Adjusting and retouching photos

Adjusting and retouching photos

Rotation, adjustments, The dodge-burn-sponge tools, the clone tool, the filters menu

37

38 Rotation

Rotation

38

Image menu, Rotate canvas 180o, 90o clockwise or counter Flip horizontal or vertical Arbitrary is for specific number of degrees (not really arbitrary at all!) Bring up grid (View menu, Show, Grid) for more accuracy

39 Adjustments 1

Adjustments 1

39

Image menu, adjustments allows you to fine-tune image (or sections of image) LOTS of options Adjust levels, color balance, brightness, contrast Contrast and Color have both auto and manual options Levels limits the range of pixels being used (auto-levels lets P-Shop do it) Very useful tool Auto option available as well

40 Adjustments 2

Adjustments 2

40

To adjust just a section of photo, use the marquee or lasso tool to select section, then adjust (upper-left in toolbox) Marquee for squares/rectangles and circles/ellipses Lasso for irregular sections Regular lasso for freehand (need good mouse skills) Polygonal for point to point (I recommend this) “Magnetic” lasso for P-Shop to decide (based on change in pixel value) Tip: Little circle in lower right of cursor lets you know you’re done; quit before that and PShop will just keep drawing lasso

41 Dodge/burn/sponge tools

Dodge/burn/sponge tools

41

Dodge – lightens an area Burn – darkens an area Sponge – saturates or desaturates color Mode box in options bar determines saturate or desaturate For Dodge/Burn, keep exposure low (20-30), use multiple passes For Sponge, keep flow low, use multiple passes Use history palette to “back up” if you go too far

42 The clone tool 1

The clone tool 1

42

Really fun! “Clones” pixels from one area of your image and places them in another VERY useful for repair and retouching Select Clone stamp tool from Toolbox Bring up image Hold down Alt key – cursor turns to crosshairs

43 The clone tool 2

The clone tool 2

43

Move cursor to general area you want to clone from (make sure there’s room on all sides) With Alt key still held down, left-click to select clone area Left-click and drag to paint cloned pixels onto new area Cross marks where you are sampling from – will move as your cursor moves Re-sample clone pixels as needed Change brush size in options bar as needed Takes practice, but a very useful tool

44 Filters 1

Filters 1

44

Almost as fun as the clone tool! Over 100 effects to choose from Some are subtle, some bizarre Filter gallery is best approach: Allows you to quickly tour all filters Shows preview on left as you adjust variables

45 Filters 2

Filters 2

45

preview

variables

filters

46 Transparency

Transparency

Creating transparent backgrounds, saving transparent images, transparency dither

46

47 Creating transparent backgrounds 1

Creating transparent backgrounds 1

47

Bring up image Need a flat color background L-click and hold down eraser tool to get all options Choose Magic Eraser tool Set tolerance to 5 in options bar (a starting point) Anti-alias should be checked (gets rid of “jaggies” on edges) Uncheck contiguous to make insides of letters transparent

48 Creating transparent backgrounds 2

Creating transparent backgrounds 2

48

Click on background Background will disappear, checkerboard will appear No checkerboard in actual image If some background remains, Ctrl + Z, raise tolerance If some logo is gone, Ctrl + Z, lower tolerance If you get ? symbol, change image mode from index to RGB Image menu, choose Mode, choose RGB

49 Saving

Saving

gifs: transparency dither

49

Only .gifs support transparency Turn on transparency here Background will be checkerboard Turn on transparency dither here (diffusion usually best) % of transparency dither Again, don’t go crazy

50 Transparency dither example

Transparency dither example

50

Without transparency dither With 51% diffusion transparency dither (all other variables the same)

51 Layers

Layers

Layer basics, moving layers, naming layers, copying layers, compositing images, transforming layers, layer via copy/cut, adding text

51

52 Layer basics 1

Layer basics 1

52

Layers are like sheets of glass stacked on top of each other From top to bottom: Text layer Text effect/Drop shadow Photo at left Gray background L-click and drag layers to move them up or down

53 Layer basics 2

Layer basics 2

53

Visibility off/on toggle

Selected layer

New layer/Drag here to copy

effects

Drag here to delete

54 Layer basics 3

Layer basics 3

54

Name your layers with a descriptive name Right-click a layer and choose “layer properties” You can left-click right inside the name to change it too The “color” pulldown allows you to color code you layers Good organization technique for complex images

55 Compositing two images 1

Compositing two images 1

55

You can save a layer from one image directly into another image Fast effective way to composite two images Right-click on layer, select Duplicate Layer Destination document must be open as well Choose destination document from pull-down

56 Compositing two images 2

Compositing two images 2

56

You can drag layers from one image to another Both images must be open Select Move tool from toolbox L-click and drag You’ll see new layer in layer palette Drag multiple times to create “clone” images If it doesn’t work, make sure both images are in RGB mode Fine-tune position by using arrow keys to move it to correct spot

57 Transforming layers

Transforming layers

57

Use transform to manipulate a layer within an image, not entire image Select layer to transform Edit menu, Transform Resize, rotate, flip, etc. Use sizing boxes or Options bar If resizing, use Scale command Click chain link in options bar to keep width/height ratio intact

58 Layer via copy or cut

Layer via copy or cut

58

You can select a section of a layer, then copy or cut the selection into new layer Use Marquee or Lasso tool to make a selection Right-click Choose “Layer via copy” or “Layer via cut”

59 Adding text

Adding text

59

Choose text tool Two ways to begin: Click once on image for insertion point, begin typing, or… L-click and drag to define text area, then start typing Use Options bar for basic manipulation Text options can all be changed after the fact – highlight text, then change settings on Options bar Font type, style, size, anti-alias type, alignment, color

60 Character palette

Character palette

60

For more advanced manipulation Window menu, Character Particularly useful for squeezing text or spreading it out

Kerning – space between 2 letters (on either side of cursor)

Leading – space between lines

Tracking – space between all letters

Vertical scale – adjusts height of type

Horizontal scale – adjusts width of type

Upper/lower case, sub/super script, etc.

61 Other resources

Other resources

61

Websites: Photoshop training videos http://www.ext.colostate.edu/pshop/ ImageReady training videos http://www.ext.colostate.edu/iready/ Photoshop and ImageReady CDs Same material as website, larger screen size Email me and ask for them jwood@coop.ext.colostate.edu

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