About Dotnet IoT use this to convert images to RGB565

[GreenShadeZhang]

At present, I use SPI communication to implement an LCD screen driver, the screen data is RGB565, when I use this library for image processing, I found that only BGR565, I use BGR565 to transmit, the picture can be displayed normally, but the picture color is not normal, I also tried to use traversed pixels to operate but it seems to be written incorrectly, I want to ask how this situation should deal with pixel data.

[brianpopow]

If the LCD screen expects RGB565 you cant send BGR565 and expect it to work.

ImageSharp does not have this pixel format, but you could try to use an implementation from the ImageSharp.Texture project: https://github.com/SixLabors/ImageSharp.Textures/blob/main/src/ImageSharp.Textures/PixelFormats/Generated/Rgb565.cs

Just copy the file to your project and see if that works.

[JimBobSquarePants]

Normal?

[GreenShadeZhang]

Normal?

Yes, it's normal, so I want to understand what the Python code does, why the data after Python transcoding is normal, and I plan to have time to use OpenCVsharp to parse the image into byte[] and write it for verification.

[JimBobSquarePants]

Ah... I understand. When you save to a file the pixel format will be converted to the format used by the codec.

The pixel format represents the layout of the expanded image which is unrelated to the encoded format.

This all reads to me like there's a bug in the Textures version of Rgb565. I would suggest copying our Bgr565 implementation and switching the components. We should probably just add it to the default pixel format collection.

[GreenShadeZhang]

Ah... I understand. When you save to a file the pixel format will be converted to the format used by the codec.

The pixel format represents the layout of the expanded image which is unrelated to the encoded format.

This all reads to me like there's a bug in the Textures version of Rgb565. I would suggest copying our Bgr565 implementation and switching the components. We should probably just add it to the default pixel format collection.

Do you mean let me refer to BGR565 to implement an own RGB565?

[JimBobSquarePants]

Yep. That’s probably wise