# Ray cloud uncalibrated camera **URL:** \ **Category:** PIX4Dmapper Questions/Troubleshooting\ **Created:** [September 18, 2019, 12:34pm UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222 "2019-09-18T12:34:28Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![aerialindustrialmode](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@aerialindustrialmode](https://community.pix4d.com/u/aerialindustrialmode)\ **Post date:** [September 18, 2019, 12:34pm UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/1 "2019-09-18T12:34:28Z")
Hi can anyone help? I’m trying to calibrate uncalibrated images. Problem A. 1. select the uncalibrated image from LHS list. 2. I click on one of the red X to generate the images below as suggested tie points. 3. Problem the suggested tie points are on a different side of the building no where near the red x. Problem B. In other images where I believe I have followed the process to create MTP’s the points are indicated by a pink x not an orange x and therefore are not inliers. I need to create 20 inliers to activate camera recalibration. can anyone suggest why I am having this problem that the software is suggesting tie points on different sides of the building? Nathan ---
**Author:** ![Pix4D\_Alumni\_MV](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/pix4d_alumni_mv/32/2071_2.png) [@Pix4D\_Alumni\_MV](https://community.pix4d.com/u/Pix4D_Alumni_MV)\ **Post date:** [September 18, 2019, 12:51pm UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/2 "2019-09-18T12:51:51Z")
Hi Nathan, Could you please attach your quality report to your reply? (You can attach files using this option: ![image](https://global.discourse-cdn.com/pix4d/original/1X/6d520cdf0cc88302f4f5bb7d3e58770fd1e9ca4a.png) ) I would first have a look on your quality report and maybe suggest you some processing options that would calibrate more cameras. Manual calibration is very painful… Thanks and looking forward to have a look on your QR. Best ---
**Author:** ![aerialindustrialmode](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@aerialindustrialmode](https://community.pix4d.com/u/aerialindustrialmode)\ **Post date:** [September 18, 2019, 3:40pm UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/3 "2019-09-18T15:40:33Z")
Hi Marco, I cant tell if the report attached as an upload. When I tried to drag and drop message read new users cant upload? Nathan ---
**Author:** ![Pix4D\_Alumni\_MV](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/pix4d_alumni_mv/32/2071_2.png) [@Pix4D\_Alumni\_MV](https://community.pix4d.com/u/Pix4D_Alumni_MV)\ **Post date:** [September 19, 2019, 6:29am UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/4 "2019-09-19T06:29:44Z")
Hi Nathan, You are right. This was disabled for new users. By now you should be able to attach it here. Sorry about that. Thanks. Best ---
**Author:** ![aerialindustrialmode](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@aerialindustrialmode](https://community.pix4d.com/u/aerialindustrialmode)\ **Post date:** [September 19, 2019, 7:17am UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/5 "2019-09-19T07:17:58Z")
hi Marco, both of these have uncalibrated cameras. Any help is appreciated. [ferrybridge loader & dolphin\_report.pdf](https://community.pix4d.com/uploads/short-url/8980tGkUEx88pQAQWcn0Q9ZCpf6.pdf) (321.6 KB) [front left\_report.pdf](https://community.pix4d.com/uploads/short-url/3uBTsSzJc7aJusrZJONhXY2fI91.pdf) (203.2 KB) ---
**Author:** ![Pix4D\_Alumni\_MV](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/pix4d_alumni_mv/32/2071_2.png) [@Pix4D\_Alumni\_MV](https://community.pix4d.com/u/Pix4D_Alumni_MV)\ **Post date:** [September 19, 2019, 12:02pm UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/6 "2019-09-19T12:02:19Z")
Hi Nathan, For Ferrybridge, we can see that few cameras are calibrated and the camera optimization is not good. ![image](https://global.discourse-cdn.com/pix4d/original/1X/c02c57ac60dbe61e251a114c571b78137fbfbcca.png) This is due to a poor matching: ![image](https://global.discourse-cdn.com/pix4d/original/1X/02c3b3ba6716373e34d390216c0766157d5377af.png) Which overlap has your flight acquisition? Maybe it is not high enough to achieve good reconstruction. We can see that in the upright corner there no matches founds. However I can suggest you the following in order to improve the quality of your project: - Set the image scale on 1/2 - Set the Internal Parameters Optimization on “All Prior” For the other one, we can see that your overlap is good and you have a lot of matches except in one zone where it is poorer: ![image](https://global.discourse-cdn.com/pix4d/original/1X/577a84da9515780969dcc2f2be80cf939897f451.png) And the camera optimization is very bad: ![image](https://global.discourse-cdn.com/pix4d/original/1X/a4c562b9f2e0ab9f50ec49e2e6c664c6024e38b2.png) In order to improve the quality I can recommend you: First, set the matching images pairs on “Aerial Grid or Corridor” and use “All Prior” If the results are not better, try to reduce the image scale. I would also, depending on the nature of the surveyed area (if it is flat (usually fields)), use “Use Geometrically Verified Matching”. Let me know if you get any better results. Best ---
**Author:** ![aerialindustrialmode](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@aerialindustrialmode](https://community.pix4d.com/u/aerialindustrialmode)\ **Post date:** [September 20, 2019, 7:39am UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/7 "2019-09-20T07:39:44Z")
hi Marco, Thank you. I am using pix4d mapper pro desktop on Mac Pro OSX10.14.3 1. I cannot see or find any reference to how to select all prior: [https://support.pix4d.com/hc/en-us/articles/205433155-Menu-Process-Processing-Options-1-Initial-Processing-Matching](https://support.pix4d.com/hc/en-us/articles/205433155-Menu-Process-Processing-Options-1-Initial-Processing-Matching) 2. Camera optimization: what usually causes this level of error? I have chosen the correct model and focal length. Nathan ---
**Author:** ![aerialindustrialmode](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@aerialindustrialmode](https://community.pix4d.com/u/aerialindustrialmode)\ **Post date:** [September 20, 2019, 8:28am UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/8 "2019-09-20T08:28:48Z")
Found the ‘all prior’ selection. ---
**Author:** ![aerialindustrialmode](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@aerialindustrialmode](https://community.pix4d.com/u/aerialindustrialmode)\ **Post date:** [September 20, 2019, 10:18am UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/9 "2019-09-20T10:18:37Z")
Oh dear the results are way worse by selecting ‘aerial grid’ and ‘all prior’ AG & AP. The image is curved from left to right and sloping back from bottom to top. ![23](https://global.discourse-cdn.com/pix4d/original/1X/664e4771fb361f06a9450da0a32c58f952da80f0.png) Should I have reloaded the file from the start with AG & AP? Nathan ---
**Author:** ![Pix4D\_Alumni\_MV](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/pix4d_alumni_mv/32/2071_2.png) [@Pix4D\_Alumni\_MV](https://community.pix4d.com/u/Pix4D_Alumni_MV)\ **Post date:** [October 8, 2019, 1:54pm UTC](https://community.pix4d.com/t/ray-cloud-uncalibrated-camera/9222/10 "2019-10-08T13:54:47Z")
Hi Nathan, The All Prior options forces the optimization the internal parameters (principal point, focal length, distortions) to stay close to the initial values. This option can remedy bad calibration in case that: - The terrain is flat and there is no 3D information to facilitate the computation of the optimized camera parameters, which leads to ambiguity (multiple possible solutions). - The project is bent after processing. - The focal length is optimized far from the initial value, which also indicates ambiguity (example: the cameras are on the level of the model). But apparently in your project it it did not help. I am surprised to see that Aerial Grid causes this curvature. I would suggest you this post as well: > [@Curved Output after initial processing](https://community.pix4d.com/t/curved-output-after-initial-processing/7572/): > > Hi Everyone,   Does anybody here also experience what have happened to me. The result is somewhat odd because the result show a very curved tie points. In reality it is a relatively flat terrain.   Please check on the attached pictures as your reference. I also attached the flight path to show that this only happens when the project area is like a rectangle which the length is much greater than the width, e.g. road, rivers. It is also my second time showing this odd result. With different da… Which file are you talking about? My recommendation would be here to do several tests on step 1 to see what are the best processing option for you data set. (it is difficult to give a ready to make recipe in photogrammetry. Sorry about that). Best