Is this the image quality that I can expect?

RogerInHawaii
Posts: 21
Joined: Mon Sep 14, 2020 1:21 am

Is this the image quality that I can expect?

Postby RogerInHawaii » Mon Sep 28, 2020 10:43 pm

I grab an image at FRAMESIZE_VGA in PIXFORMAT_JPEG and set for the highest JPEG quality,

Code: Select all

config.jpeg_quality = 0;
and what I get does not look very "high quality". In fact it looks pretty messy. What should be fairly smooth areas look all blotchy.

Is this the best I can expect from the ESP32-CAM?
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ESP_Sprite
Posts: 8921
Joined: Thu Nov 26, 2015 4:08 am

Re: Is this the image quality that I can expect?

Postby ESP_Sprite » Tue Sep 29, 2020 2:17 pm

Probably. You're using a camera and optics that cost like US$1.50 in total, and you're trying to use it in low-light conditions with a light source that seems to have some 50/60/100/120Hz flicker. I'm sure the JPEG encoder does its very best to give you a great representation of what the sensor reads, but the sensor itself only is a tiny bit of silicon, so what it reads is not that great to begin with.

If you want a better image, try taking it outside in broad daylight and a lot of the graininess and blotchiness should go away, but keep in mind you didn't buy a DSLR here.

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