Question whats the difference between Android's screenshot and Camera take picture?

[laoshanren]

Hi all.

I used Android phone to do: 1) take a screenshot; 2) camera take a picture; and sent both to ESP32_TFT through BLE by MIT APP, the 1) got better display , but 2) got realy bad display, its why I guess maybe the 1) and 2) working at different principle?

Thanks for any clue.

 

[gowtham sundar]

Yep, you're totally right. Screenshots and camera pictures work differently. When you take a screenshot, your phone captures whatever’s already being shown on the screen. So the image is super clear, sharp, and digital, basically pixel-perfect. On the other hand, when you turn on the camera to take a picture, it’s literally using the camera's lens to take a photo of whatever it sees in front of it

That means if you're pointing it at your screen, you're dealing with reflections, lighting issues, angle problems, and blur, so the result often looks worse. That’s why when you sent them both to your ESP32_TFT, the screenshot looked great, and the camera photo didn’t. So yes, they’re using totally different methods under the hood

 

[laoshanren]

Yep, you're totally right. Screenshots and camera pictures work differently. When you take a screenshot, your phone captures whatever’s already being shown on the screen. So the image is super clear, sharp, and digital, basically pixel-perfect. On the other hand, when you turn on the camera to take a picture, it’s literally using the camera's lens to take a photo of whatever it sees in front of it

That means if you're pointing it at your screen, you're dealing with reflections, lighting issues, angle problems, and blur, so the result often looks worse. That’s why when you sent them both to your ESP32_TFT, the screenshot looked great, and the camera photo didn’t. So yes, they’re using totally different methods under the hood

Thanks for the desscription.
but the camera's image displaied just can't say as 'image':

(I can't insert a image link here).

 

[COLGeek]

Upload images to a site like imgur.com and then post a link here.