This is a completely serverless screenshot stitcher for Umamusume. Inspired by ssc.kitachan.black stitching tool which is gone to this date.
- Overlapping regions: you might have taken screenshots that only have a fairly small region in common. Try retaking with one more intermediate screenshot as a possible fix.
- Screenshot order: the screenshots are not in correct order. Try changing the order with helping buttons like the reverse one before stitching.
- Screenshot quality: your screenshots might be of too small resolution, too blurry or taken with a specific color filter that makes any detection operation harder. Make sure you have a decent device with a decent screen resolution for this tool.
- Screenshot dimensions: as a general example, if you took screenshots using a PC and trimmed them by hand, there would be issues in detecting the right coordinates from these images. Make sure all your screenshots are made with the same way and with the same dimensions.
- Device: we have a ton of different devices in use today, ranging from foldable small phones to huge tablets. Some of them are brand new and some are left in the prehistoric world. Behavior can be different from one device to another, so make sure you have a decent one with the latest updates.
Simply said, the program detects the bottom frame from the UI screenshots by finding the gray-ish background color, takes a small region of the bottom part (which is about 10% of the bottom frame height) and tries to find that same region in the next screenshots.
Once the matching parts are found, the coordinates are sent to a cropping function. Once the base images are cropped, they finally get stitched together.
So make sure you leave some clearly visible overlapping skills/genes/wins etc between your screenshots, and don't use any color filter since the bottom frames won't be identified anymore by their base color (which is supposed to be #F2F2F2).
This application is a small project made by an average dev whose first occupation is to make web sites & apps and not image manipulation stuff at all. So any extremely specific issue might probably not be my cup of tea.
This project has been built with the idea of getting a standalone tool that doesn't require any backend operating server to compute image manipulation tasks.
This also allows me to host this service without paying a single dime, since surge.sh allows the hosting of static web projects for free.
No server, a free static web platform, so no ads nor donations needed to run this.
Sincerely said, no. After shutting down their service, the devs of the kitachan black tool released some Python code that allowed anyone to run their stitching program on their own. But these came with some issues for this project:
- The Python program itself was based on OpenCV, a well-known computer vision library that makes advanced image computing a lot, lot easier. But its implementation in pure javascript was too heavy to load (= more waiting time to use the tool, which is not pretty) and also said to have some performance flaws. No stable & fast OpenCV for js, so no real interest in copying the Python program for this project.
- The used functions in the Python program included some operations which would be useful in photography manipulation, but could be a bit too overkill for stitching some flat 2D UI screenshots. I decided to write the pipeline myself to make some of the computation lighter. This doesn't mean my program is performing better than using a huge and widely maintained library though. I'm pretty sure there are better ways to optimize this, and any suggestions are welcomed.
- In case you don't have the context yet, the kitachan black tool got voluntarily taken down by its owner, following a code stealing incident by a widely known japanese game guide company. To be as fair as possible on this matter, I decided not to import/transpose anything from the published Python code.
- UmaStitcher will still be marked as "inspired" by the shut down one, since the base concept still relies on how the previous tool worked.
This is a simple project I made on my free time since I really wanted a working screenshot stitcher back online. If there's any major issues, I could take a look to it but I won't promise anything about any patches or updates. Let me live.
As a reminder, this is a serverless tool; so all the computation work will be done on your device. If you have a potato phone from 10 years ago, or a weird device you got from a shady brand, don't expect this to work.
Don't - just use the issues tab if you absolutely need anything. But again, I might or might not look at it. However if you really need to contact me for any professional subject, please send a mail to poochtonic@gmail.com. Thank you.