AI in Colorizing Historical Photos and Film Quiz

Answers and explanations appear as you take the quiz.

1. Why must colorization AI 'guess' the colors in an old photo?
   • Because black-and-white images record only brightness, not actual color
   • Because the camera deleted the colors on purpose
   • Because old film was always painted gray
   • Because color always fades to black over time
2. In the Colorful Image Colorization paper, what does the model predict from the L channel?
   • Pure RGB with all channels redrawn
   • The Lab color space, predicting only the color channels
   • CMYK for printing
   • Hexadecimal only
3. How are colorization models typically trained?
   • By hand-painting millions of images
   • By scanning paint catalogs
   • By converting color photos to grayscale and learning to restore the color
   • By copying colors from nearby pixels only
4. What technique did DeOldify popularize for more believable colors?
   • Random color assignment
   • Manual frame-by-frame painting
   • Black-and-white sharpening only
   • A GAN-style generator and critic judging realism
5. What extra challenge does colorizing film add compared to a single photo?
   • Maintaining temporal consistency so colors do not flicker between frames
   • Films have no brightness data
   • Films are always already in color
   • You can only colorize the first frame
6. Why is AI colorization considered controversial for archival accuracy?
   • It makes files too small
   • The colors are plausible guesses, not verified historical truth
   • It always turns everything purple
   • It erases the original photo permanently
7. What can historical metadata contribute to a colorization project?
   • A guarantee that every predicted pixel is historically exact
   • The original color values from a grayscale scan
   • Evidence that can constrain plausible colors, such as documented uniforms or paint schemes
   • A replacement for examining the source photograph
8. How should an archival release distinguish AI colorization from verified historical color?
   • Present it as the original color photograph
   • Remove the grayscale source from the archive
   • Call every plausible hue a verified fact
   • Label it as a colorized reconstruction and document the evidence used