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Grayscale images cannot be directly saved as bmp; they will first be converted to BGR #302

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Grayscale images cannot be directly saved as bmp; they will first be converted to BGR#302

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@404NotFound-tian
404NotFound-tian
opened on Jan 13, 2026

As shown in the code, grayscale is first converted to BGR and then saved as BMP. Grayscale images cannot be directly saved as bmp; they will first be converted to BGR.
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