Understanding digital resolution :: Curriculum

Prerequisites

Computer lab with Photoshop and basic cropping knowledge in Adobe Photoshop

Lesson Time

Hook: 10 Minutes
Lecture 25: 25 Minutes
Student Practice: 25 Minutes
Assessment: 20 Minutes

Standards

California Career and Technical Education Standards

AME.FS.10.6 Know the appropriate skills and vocabulary of the art form.
AME.FS.4.2 Understand the use of technological resources to access, manipulate, and produce...
AME.FS.4.5 Know the key technological skills appropriate for occupations in the arts industry.

Objectives and Goals

The student will understand the vocabulary of digital imaging. The student will create a high resolution digital image for printing and scale it in Photoshop by cropping to a low resolution image for the web, understanding the difference between the two.

Activities in this Lesson

Jelly Beans and Pixels - Hooks / Set
Ask the question...What do a jelly bean, dab of paint and a square have in common?

Short 5 slide presentation with a picture done in jelly beans, an impressionistic painting done with paint dabs and a digital image composed of pixels.
- What do a jelly bean,.ppt [ Download ] 5 slide presentation with a jelly bean portrait
Presentation for teacher - Lecture
This is a presentation about digital resolution for the teacher to present on a computer with an LCD projector.
- Digital Resolution Lecture in Powerpoint [ Download ] This is a presentation about digital resolution for the teacher to present on a computer with an LCD projector.
- Digital Resolution Lecture in Keynote [ Download ] This is the same presentation about digital resolution for the teacher to present on a computer with an LCD projector
Student practice - Guided Practice
Open Photoshop and crop a photo for printing at 300 ppi, then crop the photo at 72 ppi to use on the web as viewed on a computer screen understanding the difference in quality.
- Video instruction [ Watch Video ] [ Download Original Video ] Students can work along with the video instruction
- Resource image to match video [ View Image ] [ Download Original ] Resource image to download for students to use to match video

Assessment

Assessment Types:: Teacher-Made Test,

Here is a quiz with teacher answer sheet to test understanding of resolution in .pdf format.

Quiz [ Download ] Quiz to measure understanding of resolution and pixels needed.

Digital Resolution

Grades:: 9 to 12
Industries and Pathways:: Arts, Media & Entertainment
Specialized Program:: Online Course/Program

Interpolation: Interpolation is the process of "stretching" a digital image by adding pixels that were not there originally. Since every pixel must have a color, this process usually involves assigning an intermediate color to the "invented" pixels based upon the colors of the pre-existing pixels surrounding the new ones.
Megapixel: The total number of pixels in an image which can be calculated by multiplying pixel columns by pixel rows and dividing by one million.
Pixel: Pixels are the building blocks of every digital image. Clearly defined squares of light and color data are stacked up next to one another both horizontally and vertically. Each picture element (pixel for short) has a dark to light value from 0 (solid black} to 255 (pure white). That is, there are 256 defined values.
Print resolution: 300 pixels per inch is a standard print resolution
Resolution: The term resolution is used for measurement with pixels as the unit of measurement in digital imaging.
Screen resolution: 72 pixels per inch is a standard screen resolution used for web images