Image Size and Resolution Requirements

 

The table below shows the ideal image sizes and resolutions for different online and screen-based applications, starting with the smallest size and progressing upwards.

Application

Ideal Image Size
(in pixels)

Resolution
(in pixels/inch)

For mobile phones and portable devices with small screens:

320 x 240 pixels

72 ppi

 

For emails, online sharing sites and viewing on standard computer monitors:

1024 x 768 pixels

72 ppi

 

Viewing at full-screen size on LCD monitors with 5:4 aspect ratio

1280 x 1024 pixels

72 ppi

 

Viewing on standard definition TV sets with 4:3 aspect ratios:

720 x 576 pixels

72 ppi

 

Viewing on widescreen standard definition TV sets:

1280 x 720 pixels

72 ppi

 

Viewing on high definition TV sets:

1920 x 1080 pixels

72 ppi

 

You need a much higher resolution when you want to make prints of your digital photos. For photos that will be examined closely - i.e. print sizes up to A4 - the recommended output resolution is 300 pixels/inch. For larger prints, which will be viewed from greater distances, the print resolution can be somewhat lower. The table below relates the output size required for high-quality photo prints to sensor megapixel counts.

Sensor Resolution (megapixels)

Typical Image Resolution (pixels)

Maximum Print Size

Print Resolution

Maximum Output Size

2.16

1800 x 1200

6 x 4 inch

300 dpi

Snapshot prints

3.9

2272 x 1704

7.6 x 5.7 inch

300 dpi

‘Jumbo' snapshot prints

5.0

2592 x 1944

8.6 x 6.5 inch

300 dpi

8 x 6 inch enlargements

7.1

3072 x 2304

10.2 x 7.7 inch

300 dpi

A4 sized prints

8.0

3264 x 2448

13.6 x 10.2 inch

240 dpi

A4 sized prints

10.0

3648 x 2736

18.2 x 13.7 inch

200 dpi

A3 sized prints

12.1

4000 x 3000

20 x 15 inch

200 dpi

A3+ sized prints

14.7

4416 x 3312

22.1 x 16.6 inch

200 dpi

A2 sized prints

21.0

5616 x 3744

31.2 x 20.8 inch

180 dpi

A1 sized prints

This is an excerpt from Post Capture Pocket Guide.
Click here for more details on this and other titles in the Pocket Guide series.

epson_Logo_100-0909

Visit epson.com.au for the latest Epson printers.

 

No