When rendering a black-and-white image, the image is not clear

[QiangHe-pfu]

Describe the bug When rendering a black-and-white image, the image is not clear

To reproduce pageImage = renderer.renderImage(0, 1, ImageType.RGB);

PDF example preview.pdf

Expected behavior Display black and white images correctly

Actual behavior Pdf is made by MAC

Environment details:

• PdfBox-Android version: 2.0.25.0
• Android API version: API 31

[xsooy]

This problem was solved in the project I copied，you can see https://github.com/xsooy/ZYJPdfBox