1. Open Your Image in Photoshop:
* Go to File > Open and select the portrait you want to edit.
2. Select the Subject with the Magnetic Lasso Tool:
* Select the Magnetic Lasso Tool: Find it in the toolbox (it's often nested under the Lasso Tool and Polygonal Lasso Tool). If you don't see it, click and hold the Lasso Tool icon until a fly-out menu appears and select the Magnetic Lasso Tool.
* Adjust Tool Settings (Important): Look in the Options Bar at the top of the screen. These settings are crucial for accuracy:
* Width: This controls how far the tool searches for an edge. Start with a value between 5-10 pixels and adjust as needed. A higher value is good for well-defined edges, but a lower value is better for areas with low contrast.
* Contrast: Determines the sensitivity of the tool to contrast. Start with 10-20% and adjust as needed. Higher contrast images can handle higher contrast settings. Lower contrast images may need lower settings.
* Frequency: This sets the number of anchor points the tool places. A higher frequency creates a more detailed selection but can be harder to manage. Start with 50-60 and adjust based on the complexity of the edge.
* Tablet Pressure for Size: Disable this unless you are using a pressure-sensitive graphics tablet.
* Start Tracing: Click near the edge of your subject in an area with a clear, contrasting edge. The tool will "magnetically" snap to the edge as you move the cursor along it.
* Follow the Edge: Slowly and carefully move the cursor along the outline of your subject. The Magnetic Lasso Tool will try to stick to the edge.
* Correct Mistakes:
* Add Points Manually: If the tool makes a mistake, click manually to place an anchor point exactly where you want it.
* Remove Points: Press the Delete key to remove the last anchor point placed. Keep pressing to remove multiple points.
* Switch to Lasso Tool Temporarily: If you need more precision, hold down the Alt (Option on Mac) key. The Magnetic Lasso Tool temporarily becomes the regular Lasso Tool, allowing you to draw freehand. Release the Alt key to return to Magnetic Lasso.
* Close the Selection: When you've traced all the way around the subject, bring the cursor back to the starting point. A small circle will appear next to the cursor. Click to close the selection.
3. Refine the Selection (Crucial):
* Select and Mask: In the Options Bar, click the Select and Mask button. This opens the dedicated workspace for refining selections.
* View Mode: Experiment with different view modes (Onion Skin, Overlay, On Black, On White, etc.) to see the selection edge clearly.
* Global Refinements:
* Smooth: Slightly smooths the selection edge (1-3 is usually enough).
* Feather: Softens the selection edge (0.5-1 pixel is a good starting point).
* Contrast: Increases the contrast along the edge, making it sharper. Be careful not to overdo it.
* Shift Edge: Moves the selection inward or outward. Slightly negative values (-1 or -2) can often clean up halos.
* Refine Edge Brush Tool (Refine Hair or Fur): This is the magic tool for hair and fur!
* Select the Refine Edge Brush Tool (it looks like a brush with a plus sign).
* Paint along the edges of the hair or fur. This will help the tool identify and include those fine details in the selection.
* Output Settings:
* Output To: Choose "New Layer with Layer Mask". This is non-destructive and allows you to easily edit the mask later if needed.
* Click OK.
4. Blur the Background:
* Select the Background Layer: In the Layers panel, select the original background layer (the layer *below* the layer you just created with the mask).
* Apply a Blur Filter: Go to Filter > Blur > Gaussian Blur.
* Adjust the Radius: In the Gaussian Blur dialog box, adjust the Radius slider to control the amount of blur. Experiment to find a value that looks natural and pleasing. A small radius (e.g., 2-5 pixels) is often enough, but the best value depends on the image and the desired effect.
* Click OK.
5. Fine-Tune (Optional):
* Adjust the Layer Mask: If the selection isn't perfect, you can edit the layer mask on the top layer.
* Select the layer mask (the black and white thumbnail next to the layer thumbnail).
* Select the Brush Tool (B).
* Set the Foreground Color to Black to hide areas (remove from the subject) or White to reveal areas (add to the subject).
* Use a soft-edged brush with a low Opacity (e.g., 20-30%) for gradual adjustments. Zoom in for detailed work.
* Add a Color Grade (Optional): Adjust the colors and tones of the image to enhance the overall look. Use Adjustment Layers like Curves, Color Balance, or Selective Color.
Important Tips and Considerations:
* Non-Destructive Editing: Using layers and masks ensures that you're not permanently altering your original image. This allows you to make changes and adjustments later without losing information.
* Zoom In! For accurate selections, especially around hair or fine details, zoom in to at least 100% or 200%.
* Practice Makes Perfect: The Magnetic Lasso Tool takes some practice to master. Don't get discouraged if your first attempts aren't perfect.
* Image Quality Matters: The better the quality of the original image (sharp focus, good lighting), the easier it will be to create a realistic blur effect.
* Consider the Depth of Field: When blurring the background, think about the natural depth of field in a photo. Elements further away from the subject should be blurred more than elements closer. You can achieve this by applying different levels of blur to different parts of the background using multiple layers and masks.
* Use the Blur Gallery: For more advanced blurring effects, explore the Blur Gallery filters (Field Blur, Iris Blur, Tilt-Shift Blur) in Photoshop. They offer more control over the shape and intensity of the blur. These are particularly useful for simulating a shallow depth of field.
Example Workflow:
1. Open a portrait photo.
2. Select the Magnetic Lasso Tool and trace around the subject.
3. Use Select and Mask to refine the selection, especially around hair. Output to a New Layer with Layer Mask.
4. Select the original background layer.
5. Apply Gaussian Blur (start with a small radius, like 3 pixels).
6. Adjust the layer mask if needed to clean up any imperfections.
7. Add a subtle vignette to further emphasize the subject.
By following these steps and practicing with the tools, you'll be able to create stunning portraits with beautifully blurred backgrounds in Photoshop. Remember to experiment and find what works best for your specific images!