Silk cone shadows on Perth verandah roof
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Category Archives: Xiaomi Yi Camera
Low light camera tests
In order to test which cameras performed best in low light, I set up five cameras simultaneously recording, for several days. I started the recording at night, so as to pick up dawn the following day.
Yi Action | Elephone REXSO | Firefly Q6 | iShare | Firefly 8S
Yi camera lens correction test
I was interested to find out what the difference was between filming with and without the Yi’s inbuilt lens distortion correction, once additional correction of the barrelling from the wide-angle lens had been corrected in After Effects.
| The images on the left are taken without the Yi’s distortion correction, and all correction in the lower image in AE, using Optics Compensation effect, FOV 74, Reverse Lens Direction on. | The images on the right are taken with the Yi’s distortion correction. Further, correction in AE, using Optics Compensation effect, FOV 48, Reverse Lens Direction on. |
The result (once all barrelling is removed) is very similar between the two. However, as the correction entirely in AE means that the image is being digitally blown up, a better image quality is probably obtained by using the camera’s inbuilt correction.
Additionally, when using the camera’s distortion correction the raw footage has less distortion in more distant objects. For some footage without near objects with identifying barreling features (such as straight lines), it may be possible to avoid using the AE effect entirely.
Yi camera 1 working
The first Yi camera that completely stopped working in the last test is now working when both the back of the camera has been removed, including the battery. The picture above show both front and back removed, although I have since reattached the front (which allows me to use the makeshift focus ring), and it also works like this.
Yi camera problem investigations
I have now numbered each camera (just visible on the photo in the previous post), in the order they were purchased. Each camera has a different version of the firmware, and the later two are a different model to the first.
| Camera 1 | Wifi: YDXJ_2326644 | SN: Z23A60252326644 | FW: 1.2.13 | Model: 23A |
| Camera 2 | Wifi: YDXJ_3144435 | SN: Z25L630ACN3144435 | FW: 1.3.0 | Model: 25L |
| Camera 3 | Wifi: YDXJ_4476443 | SN: Z25L640ACN4476443 | FW: 1.4.8 | Model: 25L |
Using the found card model on the previous post, I noted each camera’s performance. Continue reading
Found card 3 Yi test model
In order to investigate the problems with some of the Yi cameras stopping recording, and to test the use of found materials for the models, I made a quick assembly from card from a recently purchased Ikea flat pack packaging. I will discuss the model and test filming here, and the investigation into the camera problems in the next post.
Third Yi Camera
I recently bought a third Yi camera to allow three simultaneous recordings. I wanted to get this while they were still available as this camera has now been superseded by a larger and much more expensive version, with round edges so it won’t stand on its short edge.
