If you are looking to download standard image files (like JPG or PNG) from an article rather than specialized "solid images":
: Provides the depth or distance from the projection plane. download MЕ‚ynar image
: An ISPRS paper details how solid images serve as an easy way to describe 3D objects for architectural and archaeological surveying. Technical Structure If you are looking to download standard image
: Often links pixels to specific 3D reference systems. Legal & Safety Considerations for Downloading including the US
A solid image is usually composed of that allow for spatial reconstruction: RGB Matrix : The standard color information for each pixel.
: Downloading images without permission can be a copyright infringement in many regions, including the US, even for private use.