This Photoshop tutorial demonstrates how to remove a zoo photo's background. Then you will learn how to replace it with a natural wilderness background, thus hiding the people and the artificial zoo setting.
The Photoshop Polygonal Lasso Tool is one of the tools I use the most in Photoshop for removing and replacing elements. Here we will be completely cutting-away the background of the image using the Polygonal Lasso Tool, while saving the foreground object of interest (the giraffe) to ultimately transfer it to a natural wilderness setting. Note: Other tutorials exists to cutout out an image using a clipping path and mask for the most precision, or blurring the background of a photo if you'd rather take that approach. In this tutorial I will use the Glassian Blur as a final step to blur the wilderness background. Although this is not required, I just like the focal point to be the giraffe in this case.
Below is the original photo from the zoo with people in the background that I want to remove:
Here is the wilderness photo I want to use as a replacement for the zoo and to completely hide the people:
The Photoshop layers are setup with the zoo photo on top of the replacement background.
Important: Always make a backup of your original photos before modifying them. I typically modify a copy.
1. Use the Photoshop Polygonal Lasso Tool to outline the foreground object you want to isolate. In this case I am outlining the giraffe since I want to preserve it. Remember to have the correct top layer selected.
2. If you want a more precise outline I recommend using Photoshop's Zoom feature Cntrl and plus key (+) to zoom in. Cntrl and the minus key (-) will zoom out. See the example of the giraffe zoomed-in below:
3. Once you have traced your foreground subject copy it (keyboard Ctrl + C). Copying it will save the selection in memory. Then paste it, (keyboard Ctrl + V). This will create a new layer with just your selection. Rename the new layer (in this case Giraffe), keep it in the top position, and hide the old background by clicking the "eye" next to the layer. See layers below:
4. (Optional) If you want to blur your new background (bottom layer) then choose from the top menu Filter > Blur > Gaussian Blur. For this example I used a pixel radius of 2.5
5. (Optional) In your foreground (top layer - Giraffe), it may appear to have a slight white outline depending on how much contrast there is between your object and new background image. To hide these edges, I sometimes place a one (1) pixel inner border (stroke). With your top layer selected, choose from the top menu Layer > Layer Style > Stroke. Use the settings as follows: Size = 1px, Position = Inside. Now I usually choose a dark color for this and lower the opacity so it doesn't look like too much of a pronounced outline. The idea here is just to hide any light colored outline so that the image looks less like a cutout. See the example below.
The final photo with the removed background that has been replaced with a new background.
Related Photoshop Tutorials:
Cutout Images with Clipping Path | How to Apply Photoshop Gaussian Blur to Photo Backgrounds | Removing a Zoo Photo's Background and Replacing it to Hide People | Photoshop CC Spin Blur Effect | Photoshop Clone Stamp Tool to Alter Landscape Photos