What kind of model is defined as high-precision and true color 3D model?
The size and the texture details of the item can be accurately restored. High-precision 3D models can be used for data archiving, data measurement and analysis, item restoration and other applications.
Every texture and pattern detail on the item needs to be restored as true as possible (and willing to spend more time and cost for texture restoration).
What meet the requirements of this application scenario are generally the orphaned collections, 3D digitization of collections (such as cultural relics) or on-site analysis and testing of important samples (such as workpiece damage records, digital forensic analysis, criminal scene investigations, etc.), or important specimens for scientific research and education (such as 3D database of Chinese herbal medicine or paleontological specimen, etc.).
If the customer has high requirements for clarity and color reproduction of the 3D model texture pattern, the most versatile and mature solution is composed of a 3D scanner + SLR camera + 3D texture mapping software (recommended software: iReal 3D Mapping Software, Substance Painter, Mari, etc.). And why is that?
compared with photo modeling and forward modelingmethods, a high-precision 3D scanner can ensure that the size and the details of the item are accurately restored in 1:1. For example, the highest accuracy of KSCAN-Magic laser 3D scanner can reach 0.02 mm – 15 mm/m, and the resolution can reach 0.01 mm. The high-precision 3D model can be widely used in 3D data archiving, 3D measurement and analysis, 3D printing replica, 3D cultural relic monitoring and protection, etc.
Adaptabilityto different scenes
In real-life practices, customers will scan items of various sizes (large or small, coarse or fine), various materials (such as dark, black, reflective, etc.), and various textures (such as solid colors, repeated textures, etc.). When it comes to acquiring 3D white models, if the customer wants to choose a solution with better versatility, a handheld 3D laser scanner is undoubtedly the better choice at present.
Take KSCAN-Magic laser 3D scanner as an example, it has four scanning modes: large-area scanning (globally initiative infrared laser), fast scanning (blue laser crosses), fine scanning (blue parallel laser), deep-hole scanning (single blue laser), and built-in photogrammetry system. The size adaptability can fully meet the demand of 3D scanning from coin size to more than ten meters items. Speaking of the material, KSCAN-Magic has better material adaptability among the category of non-contact 3D scanners in the market. Whether the scanned object has black surfaces or highly reflective metal surfaces, it can directly scan without spraying powder. Such a 3D scanner can basically meet the 3D scanning needs in most cases.
Of course, when the budget is higher, besides a laser 3D scanner like KSCAN-Magic, as a supplement, the customer can purchase a handheld color 3D scanner (such as iReal 2E), a tracking 3D scanner (such as TrackScan 3D system), a desktop-level 3D scanner, etc. Each kind of equipment has its own advantages and limitations in different scenarios. Fully recognizing the advantages and disadvantages of each type of 3D scanner and combining them can make 3D scanning more efficient and convenient.
Although there are many types of color 3D scanners on the market, because they are equipped with industrial cameras with limited pixels (pixels of handheld color 3D scanner cameras are mainly 1.3-3 million, and the maximum pixels of fixed photo 3D scanner color camera are generally 12/24 million), and most are fixed-focus cameras and cannot be adjusted according to the size of the item. Therefore, if you want to guarantee the clarity and restoration effect of 3D textures, it is generally through the SLR (pixel recommendation: from 40 million) equipped with a color calibration card, in a uniform soft light environment for multi-angle shooting (somewhat similar to the photo modeling shooting requirements). In addition, in the face of a size of less than 30 cm items, if the need for texture restoration is higher, it must also be equipped with a macro lens.
By combining the high-precision model obtained from 3D scanning with the high-quality color photos taken by SLR, the two sets of data are imported into the 3D mapping software for intelligent mapping to easily obtain high-precision and true-color 3D models. Take the iReal 3D mapping software as an example, a regular color 3D model can be obtained within 30 minutes. Most of the steps are intelligent processing, the user skills requirements are low, so is the production cost.