Although the resolution of your scanner is a little low now, the images scanned at 600- 100dpi resolution should be ok. At present, the standard general photos of print shops are generally 300dpi. I analyze that the lens of the scanner may be dirty or have problems, resulting in poor focusing. Consider cleaning or sending it for repair. The file scanned with 1000dpi must be large, except that it should be.

Dawai

Generally, it does not need to exceed 300dpi to meet the definition requirements. Of course, it is also possible to remake with a digital camera, and I have had experience in this field. However, due to the lens, the image is distorted and the surrounding lines are arc-shaped. Use PS to handle recovery. But this is an option when there is no scanner or when dealing with a small number of pictures. Taking pictures with a camera is most afraid of jitter and uneven light. Best use

tripod

Fix the camera and use the macro and self-timer functions. Also pay special attention to the uniform light in the photo. Otherwise, it will be semi-reflective and semi-normal, that is, it is very troublesome to use PS to deal with the modification, and it is difficult to achieve satisfactory results. Also, silk.

tissue

The remake of our photo is very poor. Every particle reflects light.