Search found 4 matches

by jeremi
Wed Nov 13, 2019 1:04 am
Forum: Technical Discussion
Topic: RGB channel extraction
Replies: 30
Views: 12221

Re: RGB channel extraction

It is a red laser on a dark background. Grayscale works, but I hope to get better contrast.
Or does it mean only 5 bits of red? Than probably grayscale with the global shutter camera would be a better option.
by jeremi
Tue Nov 12, 2019 3:12 pm
Forum: Technical Discussion
Topic: RGB channel extraction
Replies: 30
Views: 12221

Re: RGB channel extraction

Hi, img.to_grayscale(rgb_channel=0/1/2) works fine up to QVGA resolution, but at VGA resolution I get an error, image is not mutable. I suppose you compress it to save space, as it is 0.6 MB raw.
Would it be feasible to have img = sensor.snapshot(rgb_channel=0/1/2) return a grayscale image?
by jeremi
Wed Oct 30, 2019 2:12 pm
Forum: Technical Discussion
Topic: VDDA Regulator
Replies: 3
Views: 631

Re: VDDA Regulator

Thank you for the great job you've done, keep it up!
by jeremi
Wed Oct 30, 2019 7:02 am
Forum: Technical Discussion
Topic: VDDA Regulator
Replies: 3
Views: 631

VDDA Regulator

Hi, I was a little surprised to see the 3.3V VDDA Regulator TPS73133 connected to VCC, which is also 3.3V out of the switching regulator. TPS731xx is a very low dropout regulator, but it needs some dropout to give ripple rejection (Datasheet Figure 14). I measured with DMM and scope, VDDA has even m...

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