Compression artifacts, blockiness artifacts, ringing artifacts, quantization artifacts, macroblocking, mosquito noise, pixelation, aliasing, jaggies, low pixel density, upscaling artifacts, low-resolution details, Gaussian blur artifacts, motion blur artifacts, lens distortion, chromatic aberration, geometric distortion, color banding, color fringing, color noise, poor color accuracy, color shifts, incorrect color calibration, color compression artifacts, Moiré patterns, halos and ringing, poor anti-aliasing, over-sharpening artifacts, lack of detail in highlights and shadows, JPEG artifacts, GIF color limitations, lossy compression artifacts, lossless compression artifacts, image quantization effects, dithering artifacts, over-saturation, under-saturation, color clipping, poor color blending, inaccurate color balance, poor dynamic range, blown highlights, crushed blacks, lack of tonal detail, poor contrast adjustments, gamma correction artifacts, incorrect exposure, overexposed highli