What primarily limits digital spatial resolution?

• A. Display brightness
• B. Pixel size
• C. Bit depth
• D. Color gamut

Answer: (B)

Digital spatial resolution is determined by how finely you sample the scene, which is set by the size of each pixel. Smaller pixels capture more samples per unit area, allowing you to distinguish finer details. Larger pixels merge light from adjacent areas, smoothing over small features and reducing the ability to resolve sharp edges or fine textures. Other factors like display brightness, bit depth, or color gamut affect brightness, tonal range, or color variety, but they don’t change how densely the scene is sampled; they influence quality in different ways rather than the spatial detail itself. So the pixel size primarily sets how sharp or detailed the digital image can appear.