What constitutes a perfect photo?
Selecting the right image is key in achieving high quality results, look for images with many grayscales. Image quality is also very important. Images from the internet typically have a resolution of 72 dpi; however, they can still yield quality results when laser processed if the image is big and can be reduced to the work piece size. Avoid enlarging small images because it delivers a lower resolution and reduces the engraving quality. In general, images for laser engraving should have a resolution of at least 300 dpi. If necessary, you can increase the resolution in your graphic software by resampling it.
Here are two examples of well suited versus ill-suited images for photo engraving:
The image to the left is well-suited for processing with the laser. It has a good contrast and exposure, and the elements in the image stand out.
The image to the right is less suited for laser processing. Even though the people stand out from the background, the exposure is too weak, which makes the people look like they are in the shadows. This makes it difficult to see details, and the people would be engraved as a unitary surface.