Resolution and Size


Resolution

Resolution determines the quality of the images recorded by the scanner.

Image quality will be improved with increasing  resolution,.However,after reaching what we called "optical resolution", it won't get any visible improvement   by increasing resolution.

The difference between "optical resolution" and "maximum resolution": Optical resolution is the "native" resolution of the scanner, depending on  the optics of the scanner hardware( for example: 300 x 600 dpi scanner, 300 dpi , the x-coordination resolution determined by CCD (Charge-Coupled Device) and 600 dpi , the y-coordination resolution determined by the steps per second of the motor . Maximum resolution is the resolution enhanced by interpolated algorithm. Interpolated resolution is useful in scanning line art or enlarging small originals,.However, maximum resolution is inferior to optical resolution in processing some image quality and crispness.

Image Size

A large image size could lower the system performance of your computer dramatically. The file size depends on the selected area, file format, scaling percentage, resolution and the image type. Please refer to the following table (file compression is included):

Image Type Description Image Size (Bytes)
8-bits images Black and White or Color Image, 256 gray levels or 256 colors (Height x Width x Height resolution x Width resolution) x (Scaling Percentages) 2 x 8 ) /8
24-bits images Color Image, Millions of Colors ((Height x Width x Height resolution x Width resolution) x (Scaling Percentages) 2 x 24 ) /8
36-bits images Color Image, Billions of Colors ((Height x Width x Height resolution x Width resolution) x (Scaling Percentages) 2 x 36 ) /8