Digital Image Fundamentals Quiz

Image Processing Fundamentals

• The fundamental steps in image processing are: image acquisition, image enhancement, image restoration, image compression, and image reconstruction.

Pixel Relationships

• Pixels are the basic units of a digital image, and each pixel has a specific value (intensity) which determines its brightness.
• Pixels are arranged in a 2D grid, with each pixel having a horizontal and vertical coordinate (x, y).
• The relationships between pixels are based on their spatial positioning, with neighboring pixels being those that are directly adjacent (horizontally, vertically, or diagonally) to a given pixel.

Color Image Models

• RGB (Red, Green, Blue) color model is an additive model, where the combination of red, green, and blue light produces the final color.
• CMYK (Cyan, Magenta, Yellow, Black) color model is a subtractive model, where the combination of cyan, magenta, and yellow inks absorbs certain wavelengths of light to produce the final color.

Spatial Domain Image Processing

• Spatial domain image processing methods operate directly on the pixels of the image, without transforming the image into another domain (e.g. frequency domain).
• Spatial domain methods discussed include: image negation, logarithmic transformation, and power-law transformation.

Image Compression

• Lossless compression: reduces the size of the image without losing any of the original data (e.g. Huffman coding, LZW coding).
• Lossy compression: reduces the size of the image by discarding some of the original data (e.g. JPEG compression).