Comments (3)
lanlan17
commented on May 21, 2024
您好，最近刚入门这个方向，在看PIFu的时候发现了您的仓库，有一些相关的问题想请教一下： （1）在PIFu的TrainDataset.py中，从生成的PARAM中提取出了ortho_ratio、scale、center参数，并利用这些参数计算得到了scale_intrinsic、uv_intrinsic，并最终算出了calib这样一个变换矩阵，但我并不是很懂calib的含义以及这个变换的过程，请您指点一下，或是能否给一些参考链接我去学习一下。 （2）第二个问题与（1）也有些相关，是在HGPIFuNet.py中，为什么某一个三维坐标值通过calib矩阵做投影之后，得到的z坐标值就是对应该点的深度值？ 希望得到您的回复。
您好，我也有这方面的问题，请问您弄明白了吗
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lingtengqiu
commented on May 21, 2024
PIFuhd 实际上用的是正交投影,他是orthogonal, 具体你们可以看下相机矩阵和 空间点的关. 他通过投影矩阵后他的 x,y 对应的是image 的uv 坐标,他的Z是他定义的某个空间中的深度. 你们也可以看看pytorch3d 中定义的world 坐标系到ndc 坐标系的关系, 其实是类似的.
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lingtengqiu
commented on May 21, 2024
您好，最近刚入门这个方向，在看PIFu的时候发现了您的仓库，有一些相关的问题想请教一下： （1）在PIFu的TrainDataset.py中，从生成的PARAM中提取出了ortho_ratio、scale、center参数，并利用这些参数计算得到了scale_intrinsic、uv_intrinsic，并最终算出了calib这样一个变换矩阵，但我并不是很懂calib的含义以及这个变换的过程，请您指点一下，或是能否给一些参考链接我去学习一下。 （2）第二个问题与（1）也有些相关，是在HGPIFuNet.py中，为什么某一个三维坐标值通过calib矩阵做投影之后，得到的z坐标值就是对应该点的深度值？ 希望得到您的回复。
https://zhuanlan.zhihu.com/p/389653208
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Related Issues (20)
- how to get ground truth of Normal ?? HOT 22
- 程式碼操作順序 HOT 1
- 文件Garment构成 HOT 6
- RenderPeople dataset still available?
- Error with ./scripts/train_pfhd_coarse.sh command
- 关于训练模型的测试 HOT 2
- Pretrain model of pix2pixhd for RenderPeople is not found
- Where should I put the test image? I want to use this model to generate some obj files? HOT 2
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- The obj model generates exceptions
- Could you release the pretrained model of image2backnormal1024?
- demo commands
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