When laser engraving photos on wood, the quality of the image is paramount to achieving clear and detailed results. It is recommended to use high-resolution images, ideally at least 300 DPI (dots per inch). This ensures that the photo contains enough detail to be accurately reproduced by the laser. Images with a higher DPI can also be scaled down without losing quality, allowing for better flexibility in sizing the engraved image.

Additionally, the contrast of the image plays a crucial role in laser engraving. Photos should have distinct light and dark areas to create depth and dimension in the engraving. It is beneficial to convert the image to grayscale, as it enhances the contrast and helps the laser distinguish between different shades more effectively.

Lastly, consider using images that are clean and uncluttered, as complex backgrounds can detract from the subject of the engraving. Simple, well-defined subjects with good lighting produce the best results. Preparing the image properly, such as applying a threshold effect or image optimization, can significantly enhance the quality of the final engraved product.