Sure, I can help you with that!
To convert JPG to PNG or TIFF without sacrificing quality in black and white monochrome scanned images, you can use an image conversion tool that supports lossless conversion. There are several options available, both online and offline.
One option is to use the Windows Photos app. You can open the JPG file in the Photos app, and then save it as a PNG or TIFF file. To do this, open the Photos app, click on the File menu, and select Save As. In the Save As dialog box, select PNG or TIFF as the file format, and then click Save.
Another option is to use a free online image conversion tool, such as Convertio or Online-convert.com. These tools allow you to upload your JPG file, select the output format (PNG or TIFF), and then download the converted file.
Alternatively, you can use an image editing software like Adobe Photoshop or GIMP to convert JPG to PNG or TIFF. In Photoshop, you can select File > Save As, and then choose PNG or TIFF as the file format. In GIMP, you can select File > Save As, and then choose PNG or TIFF as the file format.
Regardless of the method you choose, it's important to make sure that the output format is set to Lossless or High Quality to ensure that the image quality is not compromised.
I hope this helps! Let me know if you have any other questions.