Android camera/exposure/GetScanLine/PixelFOrmat

[TurboMagic 91]

Hello,

 

I want to use TCameraComponent on Android to capture images with a frame rate as high as possible
and search for something/detect something in the individual images.

 

Questions:

1. Is the exposure time of relevance there? If yes, how can I set that? I didn't see anything regarding that.

2. Which Android camera API does TCameraComponent use?

3. If I use .MAP on the obtained bitmap I get a TBitmapData object, where I can call GetScanLine on.
    Which TPixelFormat  do those bitmaps use? Is this the same format on all Android devices or how
    to set that?

 

Regards

TurboMagic

[Dave Nottage 490]

2 hours ago, TurboMagic said:

Which Android camera API does TCameraComponent use?

Camera 1 API, which has been deprecated for years. I have support for Camera 2 here: 

 

https://github.com/DelphiWorlds/Kastri/tree/master/Demos/Camera, but it sorely needs work.

 

I was hoping to use Camera X (part of Android X), but have hit issues with that:

 

https://github.com/DelphiWorlds/Playground/tree/main/Demos/CameraX

 

Continuous capture like you speak of is part of my goal, however it's low priority for me at the moment.

[TurboMagic 91]

Regarding your support for Camera 2:

Can you got a bit more into details about what work it would need?
Does Camera API 2 have a setting for the exposure time? Have you surfaced that one or would it be easy to add it?

And why, oh why, does Android need so many different takes on a camera API?

 

Regards

TurboMagic

[Dave Nottage 490]

9 hours ago, TurboMagic said:

Can you got a bit more into details about what work it would need?

Take a look at the issues towards the bottom of this list: https://github.com/DelphiWorlds/Kastri/issues

Most are prefixed with [Camera]

9 hours ago, TurboMagic said:

Does Camera API 2 have a setting for the exposure time?

Yes

9 hours ago, TurboMagic said:

Have you surfaced that one

Not as yet

9 hours ago, TurboMagic said:

would it be easy to add it?

It's not trivial, but also not rocket science 🙂

9 hours ago, TurboMagic said:

And why, oh why, does Android need so many different takes on a camera API?

Camera X appears to be just a "convenience" layer over Camera 2, so there's really still only 2 "takes". For "lower level" stuff like controlling exposure they recommend Camera 2, so I may be sticking with that for now anyway.

[TurboMagic 91]

Can you show on how to add this/implement this?

Problem is: without continous capture the thing is not usable for my purpose...