Just a little question: you wrote “So, the resolution of the acquired image is 1920x1440.” , referred to an iPad Pro 2020 with LIDAR. Well, is this resolution the same for my iPhone 12 Pro, bought a few days before?
Hello,
Yes, nearly all models from Apple (iPhones and iPads) will have the same resolution in Pix4Dcatch. Some very early models that we support may have a lower resolution. The fixed resolution is due to a limitation in the technologies we are using and is essentially limited by the hardware makers.
Other factors may affect image quality depending on sensor quality and features, such as low light performance and autofocus speed. We’ve found the iPhone 12 Pros to be very good.
Kind Regards,
George Brown
1 Like
Happy to hear that I’ve spent my money in a good device (iPhone 12 Pro 128 gb). Now I’m doing some experiences, using it, analyzing the results and comparing them with a previous acquisition of the same object (an ancient vase ) but made using an iPone X (without LIDAR). Stay tuned 
I made some acquisitions with an iPhone 12 Pro and the picture size is around 0.8-1.0 Mo. For me it’s a low resolution. How can I increase the picture quality?
Best regards,
@ totalsurvey2-xxx Look at these: they are two screenshots taken from a comparison between an iPhone X (the first picture) and an iPhone 12 Pro (the second one), using Pix4Dcatch on "cloud"
Thanks for the comparison. Could you tell me the average size of the pictures taken with your iPhone 12 Pro? I’m far away of this quality with my 12 Pro.
This is the link to the project made by my iPhone 12 Pro PIX4Dcloud
Thanks, but I’m not able to check the size of the picture. The project open, could you go “files” (top of the right) and download one or two pictures and tell me the size?
What do you mean? Do you mean the dimension of each one picture or the “weight” of entire project?
I mean the size (Mo?) of one picture. Not the total weight of the project.
For example:
size of one of image is 849 ko, so less than 1Mo.
Sorry, I can’t reply to your last post and I’m obliged to edit my last one. But yes it’s helpful. Thanks!!!
Ok, ok. If you want, we can keep in touch and socialize our results. I own a perpetual license of Pix4Dmapper and recently I won a one year license of Pix4Dmapper, Pix4Dsurvey and Pix4Dmatic. I have also a subscription to upgrade and support service until June 2021 Here my email address: ing.anelli@tin.it Kind regards
1 Like
You should have received an email with my personal address to keep in touch.
If you want to get best quality photos out of iPhone don’t use Pix4Dcatch. The Camera app on iPhone will capture images at 3024x4032 resolution.
Yes, that could be an alternative.
The point is, the overlap fonction in Pix4DCatch is quite cool. it’s a shame that there is no possibility to set the resolution in the app.
I’m doing some tests to find the best solution.
It is the best alternative and be sure to get as close to the object as you can. Antonio’s picture is imho incorrect way to do photogrammetry. The vase is only covering small portion of the frame.
In that case of not using Pix4DCatch for acquisition, how do you manage the overlap of the images?
Ok: we are in touch now
1 Like
Practice makes perfect. Trial and error and you’ll know how to take images with right overlap.
1 Like
Hello Antonio, totalsurvey2 and Jaakko
@Jaakko_Laihola thank you for bringing up an interesting alternative workflow to enable users who may not be happy with the resolution provided by ARKit. It is indeed a valid workflow but can be time-consuming and require expertise and a good understanding of photogrammetry.
Due to the technical limitations enforced by the hardware, it is not possible for us to use the full resolution of the camera. The reasoning could be to avoid the overheads on the CPU or GPU that can impact performance. Hoping that advancements in technology will change this.
I’d like to give you the reasons why using Pix4Dcatch is still worth your time and effort for capturing data to produce accurate 3D models:
- As @totalsurvey2-xxx mentioned, the overlap function, as well as the real-time mesh feedback, is good to guide you on the coverage of your area of interest.
- It provides the positioning and pose information that automatically triggers the images and locates the project in the real world when compared to the device’s internal GPS that only gives a rough estimate
- It also provides the correct scale and hence you don’t have to set scale or orientation constraints
- You can easily upload the projects to the cloud and process them. Capture > upload to Pix4Dcloud > come back home to your 3D model.
Overall, Pix4Dcatch can be the go-to solution for those who want a quick and accurate 3D model while experiencing the potential of photogrammetry and LiDAR combined. The best part: you don’t need to be an expert!
I hope this gives you more clarity.
Thanks and best regards
Amritha