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Tiff images, DPI and compression

Hi, I am working on a combination of OpenCV2.4.0, and leptonica. We are processing tiff images. At the end of the image processing, I am noticing that the DPI of the resultant image ( created using "imwrite") has come down from 150 to 96 and I also notice that the image has been compressed by LZW method thought the original image was uncompressed. Also, the Bit Depth has come me down from to 8 from 32 (as was on the original image). Are there ways to fix these three?

  • Karthik