How to take pictures with your mobile phone as a model?

If you want to create a real 3D scene and share it with your friends quickly, you can do it "as before". No professional background, no measuring equipment and no manual mapping are needed. As always, it makes scene reconstruction easier. You just need to take a few photos.

How to take pictures:

If you haven't done reconstruction, photography and other similar projects before, how to take photos becomes very important. By summarizing the following points, you can better create your 3D scene:

Planning shooting range

Reasonable photo overlap

Correct camera parameter settings

Suitable shooting lighting environment

Photographic method

1. Plan the shooting range.

First, you need to determine how much you need to rebuild. We suggest that you appropriately expand the identified scope to ensure that the data in the scope you want to rebuild is complete and accurate. For example:

Let the picture be completely covered.

Incomplete picture

When you think it is necessary to improve the model's recognition, you can take detailed photos separately, provided that you have complete photos first, and these supplementary photos need enough details.

2. Reasonable photo overlap

When taking photos of scenes and objects, try to take them from different angles and ensure that there is enough overlap between these photos.

The overlapping degree of adjacent photos is suggested to be 70% ~ 80%. Too low overlap may cause the photos to be unable to be reconstructed, while too high overlap may increase the workload of photo collection and prolong the reconstruction time of the model.

If you shoot an object with a camera or a mobile phone, you can take pictures from different angles and levels of the object by surrounding shooting, and adjacent photos also need to meet the requirements of overlapping.

Shoot details, whether it's a scene or an object. If you need some parts with more details, you can take more detailed photos, but you need to ensure that these parts have feature points in the photos and there is reasonable overlap between the pictures. For example, as follows:

Overlapping degree of adjacent photos

3. Correct camera parameters

If possible, it is recommended to use good cameras, such as SLR cameras and micro-cameras. Of course, there are mobile phone photos, cameras and so on. It can also be reconstructed, and it is necessary to judge whether the clarity of the photo meets your expectations. In addition, try to use the same camera or photographic equipment for the same project to avoid inconsistent images.

The parameter setting of the camera directly affects the image quality. Correct parameter setting can make the restored model better. The values of IOS, shutter, aperture and white balance set when taking pictures are very important. For specific usage, please refer to the instruction manual of the camera and photographic equipment you use. However, the following points should be met:

The image will not be blurred or stretched.

The granularity of image ISO should not be too large.

The effect of large depth of field is not suitable for taking pictures.

The white balance of the photo should be close to the real white balance.

Make sure the brightness of the photo is correct.

Fuzzy object image

A large depth of field can lead to blur.

Incorrect exposure

4. Suitable shooting lighting environment

Scene restoration has no specific requirements for the shooting environment, and the artistic conception expressed in different environments is also different. If the real texture information of the object is required, it is suggested that you can choose to shoot in sufficient light or build an artificial lighting environment to shoot.

Stable shooting light environment

Good natural lighting environment

5. Upload modeling

It's easy to get to this point when you handle the photo shoot. You only need a few simple steps to complete the scene restoration on "As usual". Create a new project-upload photos-start modeling, simple three-step operation.