Capture Camera Quality

[Hazim Dirdiri]

Hello,

I'm doing Optogenetic acquisition using bonsai; and recently the Quality of the video captured from the camera is significantly bad, The output is about 28Mb for 20 min video, with very blurry image; that is not the same of the camera itself. previously it worked well! So i'm trying to figure out the cause, maybe it is the FourCC encoding, but it seems well! and Camera Capture from the beginning is not working well.

Attached the workflow:

Thanks,

[Ori Yarden]

The image in the frame looks fine, and if you're wondering about the LargestBinaryRegion node which appears "blurry" (ie fewer pixels) it doesn't look like bad image quality; you could try moving the camera closer to the arena.

Best,

On Fri, Mar 5, 2021 at 7:20 AM Hazim Dirdiri <hazim.d...@gmail.com> wrote:

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Ori Yarden

Teacher's Assistant

Psychology Department

Florida Atlantic University

BS-12, room 123

Boca Raton, FL 33431

[Hazim Dirdiri]

Sorry, i found my reply wasn't sent.

Thanks for your response, i think it's hard to see in the attached screenshot, but the quality of the video gets reduced a lot from the one captured in camera and the one in bonsai that's in the output. Which in some videos makes trouble in detecting the threshold.

Best,

Hazim

[Ori Yarden]

If you are not using the Crop node in your workflow, then the image quality (ie number of pixels) should be 1:1 for the camera and boncai output; if you are using the Crop node, well then that's what is causing the reduction in image quality (ie number of pixels) for the bonsai output video. So if you are using the Crop node, decrease the distance between the camera and object being filmed (ie in your case lower the camera's position as much as you can while still having everything you need within the frame as to avoid having to use the Crop node). Other then that, maybe your configuration file for the camera capture node is set below your camera's performance.

Best,

To view this discussion on the web visit https://groups.google.com/d/msgid/bonsai-users/a5ef3521-0c05-4ce6-8edf-ebafdb36cb71n%40googlegroups.com.

[Sebastian Wittekindt]

Hi Hazim,

Not sure this will solve your issue but you could try using the FourCC code "DIB " (important to include the space). This will encode in close to he source quality, without compression.