Students will learn to use the calipers, virtual props, and ratio tools in the Size Wise app to create forced perspective photographs while noticing and using ratios in the process.
Image Size Ratios
Intro to Topic and App (10 minutes)
Virtual Giraffe Challenge (20 minutes)
Sharing and Discussion (10 minutes)
Intro: Have you ever seen those funny photographs where things look wildly larger or smaller than they really are? Display examples like those found on the blog: www.hongkiat.com/blog/force-perspective-photos
In this activity, you will create some forced perspective photographs by taking pictures of you and your friends posing with a virtual giraffe in the Size Wise app.
The Giraffe Challenge: Pose with the giraffe in three photos so you are:
Which picture is the funniest? Use ratio language to describe the composition of your shots.
Virtual Giraffe Challenge (20 minutes):
Prompt students to describe the photos that they took and what they had to do to achieve certain shots. Encourage students to think about how many times larger or smaller an object is in relation to another. Have students discuss which ratios get the best or most satisfying effects (e.g., why does setting up your subject in a 1:1 ratio with the giraffe look funny)?
Language and discourse to listen for:
Giraffes on average are 15 to 18 feet tall. You can extend this activity by having students compose a realistic shot of themselves standing next to an average height giraffe. They will need the ratio and caliper tools and real-world data about giraffe heights. If they were standing next to a real giraffe, what would the ratio of the student’s height to the giraffe’s height be? What would they look like standing next to one another? For example, if a student is 5 feet tall, a 15-foot giraffe is 3 times as tall as she is. The image size ratio of student to giraffe is 1:3. A link to other interesting “Size” issues with giraffes can be found here:
This can also be done with other virtual props with known sizes in our prop library.
Move back in forth in space to pose with a virtual giraffe so that you appear to be different heights.
|In Camera Mode, you will use:|
|To enter and calibrate the height of themselves and their friends|
|To see how the image size of their subject relates to the image size of the virtual
|To reflect on the things they notice about the pictures they take. They can email
these notes to themselves.
|In Gallery Mode, you can use:|
|Compare data across 4 photos (e.g., note the image size in each of the photos)|
|Write ratios that they see on the photos they took.|
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