Minor Project Background. ASV 2022 Bubble Nebula NGC 7635 – HST Last studio: — rotate — crop Share and critique! — image maker: What was your intention with the image Were you successful What did you learn — Others: Positive feedback Our eye-brain system generates complementary colours. o Should we base “reality” on our eyes “In preparing for battle I have always found that plans are useless, but planning is indispensable.” Dwight D. Eisenhower. You will modify your work as you go along but it pays to be thoughtful at the beginning. Filters: F336W Continuum UV F555W Continuum Optical F547M Continuum Optical F791W Continuum NIR F502N Emission line Oxygen F656N Emission line Hydrogen F658N Emission line Nitrogen F673N Emission line Sulfur Plan. Keep Notes How are Optical Images Made Light passes through a filter in front of the satellite’s instrument. This produces black and white images for parts of the spectrum of electromagnetic radiation (which includes light). Visualization techniques: Composition and Colour Harmony Play a role Which part of this image jumps forward and which part falls back Visualization versus Scientific Meaning Composition and Colour Harmony Play a role Which part of this image jumps forward and which part falls back You will pick colours to give your image depth. Visualization versus Scientific Meaning Composition and Colour Harmony Play a Role How is your eye led in a picture V. Van Gogh Visualization versus Scientific Meaning NGC 2207 and IC 2163 Conventional north up and east to the left Visualization versus Scientific Meaning Hubble Heritage Orientation You can rotate and crop an image. Colourize Data using Simple Colour Wheels These are useful for selecting colours to make harmonious compositions. Note the relationship between the additive and subtractive systems. Compensating Tones Here’s an example using warm blue (cyan) and a shade of its compensating tone (orange) to have “blue come forward” and “red go back”. Seven Colour Contrasts These 7 colour contrasts, described by Johannes Itten (1970,1997) can be used in conjunction with the colour wheel based on Newton’s experiments. Seven Colour Contrasts Steps for your Minor Project. Fire up GIMP! (Take Notes!) 1. Setup layer file (.xcf) – Make new file with black background – Copy thumbnails into layers with screen mode Copy visible, paste, name, set mode = screen. 2. Colourize each layer – Copy layer, turn off original – Use levels tool to select colour in active layer 3. Adjust colours – Curve tool Fire up GIMP! 4. Create single layer file (.tiff) – Make new file with black background – Copy visible from .xcf file and anchor, flatten. 5. Adjust colours – Curve tool 6. Orient 7. Crop 8. Cosmetics
