Roland BN-20 User Manual download pdf (Page 5)

3) What is an Appropriate Resolution for the Image Data?

For large format printing, the desired image resolution is 150 PPI at full size. In case of low resolution, its

image is an unsuitable for viewing from a short distance since the pixel is too coarse. If an original image

resolution is low, the print quality will not improve by increasing the image resolution set with an application.

The resolution of the original image must be as high as possible. If scanning, the highest resolution should be

used and then saved to an appropriate lower resolution after all adjustments have been made.

150ppi 50ppi

What is PPI (Pixels Per Inch)?

PPI (pixels per inch) is a measurement of the resolution on devices such as monitors. Squares are aligned

horizontally and vertically, and each of these displays a color, shade and tone. Each of these squares is

called a pixel and the PPI unit refers to how many pixels are contained within 1 inch (2.54 cm).

For example, 100 PPI means that 1 inch long line contains 100 pixels.

1pixel

1inch=2.54cm

How to con rm [Image Size] in Photoshop

Select [Image Size] on the [Image] menu.

Document size: 68.58 mm x 68.58 mm

Resolution: 150 PPI. File size: 454.4K

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Roland BN-20 User Manual Page 5