I finally got things built and I am testing and attempting to do a rough calibration with the pixels on the floor. Here is the problem:
I am simply trying to get a good greyscale. I have made a PowerPoint slide that is a gradient from white on the left to black in the center and white on the right.
What I am seeing is little to no grey. The entire strip is bright white until the middle where about 20 pixels are off. Bordering the black pixels it is very slightly less than full white.
If I increase the gamma the amount of black pixels goes up, but there is still no gradient. These pixels supposedly have 24 bit color capability, so I should have 256 shades of grey available. I have played with as many setting as I can find to no avail.
Here is my setup:
- 300 Pixels (SK9822) when installed it will be about 475, but testing with 300.
- Settings - all 300 at the top of the image, 0 on the sides and bottom. I just want to capture and show the top of my PowerPoint slide.
- 60A MeanWell Power supply - Inserting power at the beginning and the end of the strip
- RPi4b - slightly overclocked, 8GB version
- Logic level conversion using 74HCT245
- Video capture from Hyperion Windows capture
- Settings: Scaling factor - 16
Thoughts?