相片尺寸分类（Photo size classification）.docVIP

相片尺寸分类（Photo size classification） One, home digital printing reference. To save memory card space, most digital cameras offer a wide range of photo quality for user selection. Mainly divided into Best (best quality), Good (good quality) and Normal (ordinary quality). The difference is that the captured JPEG photos are compressed to varying degrees. But too much compression will seriously affect the quality of photo printing. So pictures taken from the latter may not really be suitable for printing. Before taking a photo to print, it is better for users to check that the quality of the printed photos is proportional to the captured image files. To ensure that the printing results are satisfactory, you can refer to the following table. Print size (inch) file size (minimum) required minimum resolution photo size (1 inch / 2 inch) 150-200KB 640x480 (300 thousand) 2.5 * 3.5 cm / 5.3 * 3.5cm (5 x 3.5 inches) 3R, 500-550KB, 1280x960 (1 million 200 thousand) 12.70 * 8.89 cm (6 x 4 inches) 4R, 600-650KB, 1280x1024 (1 million 300 thousand) 15.24 * 10.16 cm (7 x 5 inches) 5R, 800-900KB, 1600x1200 (2 million) 17.78 * 12.70 cm (8 x 6 inches) 6R, 1-1.2MB, 1900x1280 (2 million 400 thousand) 20.32 * 15.24 cm (10 x 8 inches) 8R-8F, 1.3-1.5MB, 2048x1536 (3 million) 25.40 * 20.32 cm Note: please refer to table 2 for other sizes The above figures are the basic requirements. The higher the quality and the larger the files, the better the prints will be. If users want to print digital photos frequently, it is better to check that the photos meet the above requirements. The authors personal advice is to use best quality as much as possible to minimize photo detail loss and to ensure good print results. In addition, the user may calculate the correct digital photo output size according to the following formula. Shoot / 300dpi = output size resolution For example, assume that the photo taken is 1 million 500 thousand pixels (1024x1536), dividing 1024 and 1536 by 300, and drawing 3.5 inches