U2Ch1L7_Encoding Black and White Images (15pts.)

Purpose: Students will learn how to use bits to encode a black and white image. Gradesheet

Vocabulary: Pixel, Sampling

Journal: Define Pixel (indv/partner). Instructor explain with an image.

Video: A Little Bit about Pixels - Video

Handout: “Encoding a 3x5 Letter A”. Handout!

• First, view the Raw stream of bits that make up the letter ‘A’ and the explanation that accompanies it.
• Second, now…you try to write the stream of bits to create the ‘A’.  
• Third, compare your attempt to the original. Did you succeed.

Activity: Encoding a Black & White Image and "Sampling"
Open Code.org U1Ch1L7: Black & White Images and begin using the Pixelation Widget.

Letter 'A' (Puzzle 1/8)	Fix the "C" (Puzzle 2/8)	Challenge A: Black Bird_6x8 Grid - (Puzzle 3/8)	Challenge B: Black Bird_12x16 Grid (Puzzle 4/8) - (5pts.)

Journal: View the image in “Challenge A” and “Challenge B” (above). Define Sampling.

Challenge C: Recreate a Corporate Logo - (Puzzle 5/8) Handout! (10pts.) Select a corporate logo to recreate. Select a grid sample size - use one of the grids from the handout I provided you. Draw the logo. Now create the logo on the Code.org widget. When done, show your image to a classmate and decide if you need to increase the Sampling Size.