CS 325 and Film 385: Introduction to Photoshop
Highlights of this lab:
- What is Photoshop?
- The Photoshop Workspace
- Picture Image Manipulation (Size, Colour, Frames, etc)
- Image Construction
:: What is Photoshop? ::
Adobe Photoshop is one of the industry standards for desktop image editing and graphic manipulation. With it you can scan images, make original art, or composite images as well as colour correction, retouching and other image manipulations.
:: The Photoshop Workspace ::
The Photoshop workspace consists of four main components:
- The Menu
- The Toolbox
- The Options Bar and
- The Palettes.
Below is a furthur detailed explanation of some of the 4 main components that is photoshop
The Menu contains controls for common functions such as opening and saving files, as well as specific functions, such as copying and pasting, calling up specific windows or Palettes, and controlling the Photoshop workspace.
The main toolbar is reproduced below. It contains a collection of tools for creating, selecting, and manipulating images.
:: Picture Image Manipulation (Size, Colour, Frames, etc) ::
Save the following image on your computer (right click and "save"). It is the image we will be working with to demonstrate how to manipulate images using photoshop. Please note that this image was taken from The Official Lord of the Rings website (Just for copyright mumbo-jumbo)
Aside (From last years lab): Make sure mode is RGB colour so that the image can be manipulated
Save the image by clicking:
- File --> Menu
- Photoshop should select the directory from which the image was loaded and should choose Photoshop's PSD file format as the image format.
Photoshop provides 3 simple tools for selection:
- Marquee Tool (Rectangle and Elliptical): Selects areas in the image that you wish to explore further
- Lasso Tool: This tool is very similar to the marquee. BUT you are using a "freehand" tool to make the selection! Notice that you don't need to "draw" a closed shape, Photoshop will complete (close) the selection for you!
- Colour Wand: The colour wand (or "Magic Wand") is used to select areas with similar colours. Select the wand and then click on the wall, Photoshop should select a part of the wall, the tolerances can be changed (look on the Options Palette). Change the tolerance (from 32) to 75 and select again. Photoshop should select a much broader range of colour (probably too much).
You'll find them at the top of the toolbar. In addition, you can use commands on the Select menu. Select each of these and see what they can do
If you would like to combine actions simply hold the shift key down when creating the selections. Holding the alt key down while creating additional selections causes the new selections to be subtracted from the already created selection. Holding the alt & shift keys down while making a selection causes the new selection to be intersected with the original selection!
There are a number of ways to select a colour in Photoshop:
- The Eyedropper on the main toolbar is extremely useful! Select the Eyedropper and click on the image, notice that the foreground colour has changed to the colour selected! This is usually the easiest and best way to set the current colour to match part of an image.
- The foreground/background colour selector in the toolbox. click on one or the other and choose a colour!
- In the file menu, go to Image - Adjust and there are also a number of interesting toold in there like:
- Brightness/Constrast: Adjusts the brightness and contrast levels accordingly
- Auto Colour Levels: Adjust the colour levels automatically
To zoom-in on a part of an image, select the zoom tool from the main palette, then move the cursor over the part that you wish to zoom-in on and click the left mouse button. To zoom-out, hold the alt key down and click the left mouse button.
While Photoshop is quite limited in the range and power of the drawing tools available (no circles!) they can be used to draw a wide variety of shapes.
- Adding text to an image with Photoshop is very simple. Click on the text icon and then click where the text is to be placed. Photoshop will display the "Type Tool" dialog box, this allows the text to be entered and the characteristics of the text (font, size, alignment etc) to be set. Select "Ok" when you're happy with the text, the text will then be added (on a new layer).
- The Paint bucket tool is fairly straightforward. Simply click on the tool and then move the cursor into the drawing area and click... the foreground colour will be used to fill the canvas, until the edge of the current selection or until a pixel of a different colour is encountered.
- The gradient fill fills an area, like the paint-bucket, but instead of using just one colour will use a range of colours - gradually changing from one colour to another. After selecting the tool, simply select two points (hold the mouse button down) and Photoshop then draws the gradient fill. The fill can be constrained by the current selection.
- The line tool is used to draw straight lines! The thickness of the line can be set using the Options Palette. Unfortunately, Photoshop's implementation is quite limited, for example, the thickness of the line can not be made to vary along the length of the line.
- The pencil, is very like the line, but it is used to draw "freehand" (rather than straight) lines.
- The airbrush tool works like a spray-can, the longer the tool paints an area the more saturated the area becomes and the tool's edges are "soft". The diameter of the spray can be set using the "Brushes" section of the options palette.
- The paintbrush is very like the airbrush. The main difference is that continually painting the same spot doesn't alter the image. The fade option is worth looking at... try setting it to a low number (for example: 10).
These editing tools (like the paint tools) will either work on the whole of the current layer or on the currently selected area...
- The eraser normally replaces the graphics erased with the background colour. There are two interesting options (on the bottom of the options palette). Try this tool with a non-white background colour!
- The rubber stamp is a tool that allows a part of an image to be duplicated. After selecting the tool, move the cursor to the area you want to copy, then hold the alt key down and click with the left button - this establishes the initial reference point. Move the cursor to where the "copy" is to be placed and start drawing! There are a whole swag of interesting options with this tool. Look in the "Option" drop-down list. For example: select "Impressionist" - and have fun!
- The smudge tool - as you'd expect - smudges the graphics where it's used. Select the tool and then draw a "sweeping" stroke across the image.
One of Photoshop's most powerful and most popular features is Layers. Conceptually, layering is very simple: imagine drawing an image on a number of transparent sheets, laying the sheets on top of each other and then copying those sheets to produce a final image.
To demonstrate how layers work let us frame our friendly little character picture of everyones favourite villian
- Step 1: Add space to your image. Choose Image > Canvas Size, then increase the width and height to add empty space at the edges. Although increasing the canvas size of your image is optional, adding space around the image prevents the loss of any part of the photo when defining the frame area.
- Step 2: Create a new layer. Then choose Select > All, press Ctrl + A (Windows) or Command + A (Mac OS) to select the entire Frame layer. To help distinguish between the image layer and the border layer. you might want to name the new layer, "Frame" or "Border."
- Step 3: Select the rectangular or oval marquee tool, hold down the Alt (Windows) or Option (Mac OS) key and drag the area of the photo you want framed by the border. The selection is subtracted from the image, leaving the border area selected.
- Step 4: Fill the selection. With the border layer selected, choose a colour from the colour picker then choose Edit > Fill. In the Fill dialog box, make sure Foreground Colour is chosen for the Use option. Leave the Blending mode at Normal and Opacity at 100%. Click OK. Instead of using the Fill command, you can choose a colour from the colour picker, then select the paint bucket tool to fill the selection. Or, you can use brushes to apply more than one colour to the selected area.
- Step 5: Add texture to the selection. In the Layers palette, make sure the Frame layer is selected. Choose Filter > Texture and then choose the texture filter of your choice. In the filter dialog box, you might have to move the preview image to see the filled area of the layer. Adjust the settings to your preference. Click OK.
- Step 6: Make the border look three dimensional. With the Frame layer still selected, click the Add a Layer Style button and choose Bevel and Emboss from the pop-up menu. In the Layer Style dialog box, adjust the Bevel and Emboss settings to your discretion. Click OK.
:: Image Construction ::
Seeing how I have already devulged by nerdness, why stop here? What we are going to do now is construct our own image. Since I have already shown my fantasy nerd ways with Gollum, let's go to space and make a planet that the folks from Farscape might pass on their journeys...or maybe a planet that the fine folks from the SGC (Stargate Command) might visit!
- Step 1: Create a new document
- Step 2: Create space by clicking Edit - Fill - Choose "Black"
- Step 3: Create a starfield by clicking Filter - Noise - Add Noise
- Choose 15%, Gaussian, and Monochromatic
- Step 4: Tone down the stars a bit by clicking Image - Adjustments - Brightness and Contrast
- Choose Brightness of -50 and Contrast of 55 (or so, use your own judgement)
- Step 5: Make a new layer
- Step 6: Construct the planet by clicking (in the new layer) Filter - Render - Clouds
- Step 7: Add some more noise by clicking Filter - Noise - Add Noise
- Choose 5%, Gaussian, Monochromatic
- Step 8: Try and clean it up a bitt by clicking - Filter - Blur - Motion Blur
- Choose an angle of 0 and a distance of 7
- Step 9: Choose the elliptical marquee tool and draw a circle
- Step 10: Make the circle appear as a sphere by clicking Filter - Distort - Spherize
- Choose 100% and mode = normal
- Step 11: Get rid of the space we don't need by clicking on Select - Inverse - Hit Delete
- Step 12: Move around the planet to your liking
- Step 13: Select the backgorund layer, found in the panels
- Step 14: Create the appearance of a star by clicking Filter - Render - Lens Flare
- Choose brightness 160 and type default
- Step 15: Create a new layer and place it above the last one (Layer 1)
- Step 16: Hit ctrl, or command (on a Mac), and click on layer 1 (the first added layer) to get an instance of the selected object
- Step 17: Draw a gradient appropriate to the sun by clicking on the gradient tool.
- Step 18: Change layer 2's blending mode, located in the panels, from normal to multiply
- Step 19: Adjust the Hue/Saturation by clicking on Image - Adjustments - Hue/Saturation
- Choose Hue = 16, Saturation = 60, brightness = -10, and colourize and watch your planet take colour!
:: Assignment ::
For this lab assignment I want you to create a photoshop project and either enhance a photograph using the tools in photoshop or construct an image using photoshop.
- Marking scheme:
- 0.5: For handing something in (one of the above)
- 0.0 - 1.0: For creativity, skill, and originality etc.
- 0.0 - 0.5: For "going that extra mile".
Submit your photoshop project file(s) on Web-CT before the due date...which is October 11th at 11:00am, in the assignments folder using the link for this lab assignment.
Note: If you choose option 1, i.e. enhance a picture, make sure you submit both the original picture and the enhanced picture so I can compare the 2.
:: Online Source(s) ::