- There is no discernable difference with small color pictures made into GIF thumbnails from the original PICT or JPEG files at the same resolutions; the file size is the same and the quality is comparable. For more on this, see
- With full size color pictures made into either GIF or JPEG thumbnails, there is very little visual difference, if the resolution remains constant. Loading time and file size are different; with the same ppi, the GIFs were smaller. For more on this, see Study Two.
- In Study One and Study Two, the differences in JPEG compression (maximum, high, medium, low) were too slight to matter visually.
- The GIF thumbnails made from PICTs were the clearest, when compared to GIF thumbnails made from JPEGs or with JPEG thumbnails, but the difference between the three was very slight. Resolution of the scan and the original image matters more than format type when making thumbnails. Images were best when scanned at 150 ppi than 72 ppi. For more on this, see Study Two.
- When making thumbnails of text on paper, the clearest format is a JPEG scanned in grayscale and saved as a JPEG compressed file. For more on this, see Study Three.
Back to the Beginning
Maia Jin, email@example.com, October 1995