Picture Lab. Manipulating Pictures Discussion and activities with java.awt.Color introduce students to megapixels, pixels, the RGB color model, binary.

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Presentation transcript:

Picture Lab

Manipulating Pictures Discussion and activities with java.awt.Color introduce students to megapixels, pixels, the RGB color model, binary numbers, bit, and byte. Processing individual pixels involves 2D array concepts: row-major order, column-major order, array of arrays, and nested loops. And more…

Intro to digital pictures and color 20 minutes – 1 hour

Picking a color Students practice making different colors using combinations of red, green, and blue light using a JColorChooser. 20 minutes – 1 hour

Exploring a picture PictureExplorer tool Pixelation 20 minutes – 1 hour

Two-dimensional arrays in Java (Optional activity) Students write methods for 2D array of integers. – Declare 2D array – Create 2D array – Get or set elements – Get number of rows/columns – Traverse in row-major and column-major order 30 minutes – 1 hour

Modifying a picture OOP Concepts 1 – 2 hours

Mirroring Loop through a range of rows and columns. 1 – 2 hours

Mirroring part of a picture Loop through a range of rows and columns. 1 hour

Creating a collage Overload copy method Modifying Mirror the resulting collage. 1 – 3 hours Collage with vertical mirror

Simple edge detection Calculate color difference with distance formula 1 – 3 hours

Extensions – in Teacher Guide Steganography Chroma key