If the file is a 16-bit uncompressed TIFF, and its size is 33 MB, then the image contains only about 5.8 megapixels. The bit depth of 48 means 16 bits for each of the red, green, and blue channels, and similarly 24 is 8 for each channel. On reviewing "Properties"/"Details" for each image, original TIFF is noted as Uncompressed with a Bit Depth of 48, where as the watermarked image has compression noted as "LZW" (what is that?) and Bit Depth of 24. (I've just updated prior response with some image data, Pixels the same, one is uncompressed and 48 bit depth, the new watermark image is compressed "LZW" and a reduced bit depth of 24) I have no idea I almost never watermark, and where I do, it's either in the raw converter (DxO PhotoLab has this feature) or pixel editor, basically part of the creation of the original file, not done with stand-alone watermarking software. I follow the logic (I think!) - Is there a w/mark application that doesn't degrade the TIFF when applied?
*At 6000x4000 pixels, with three channels each pixel (red, green, and blue), an uncompressed 8-bit TIFF would be about 69 MB, and an uncompressed 16-bit TIFF would be about 138 MB.
VISUAL WATERMARK 2.8 SOFTWARE
Given that TIFFs from your 24 MP camera were 33 MB, my guess is that they started out as either losslessly-compressed 8-bit TIFFs, or lossy-compressed 16-bit TIFFs.* And then the watermarking software recompressed, probably in a lossy way, which is why there's a loss of quality. (3) Compression: many TIFFs are uncompressed, some TIFFs have lossless compression, and IIRC you can even, in some software, apply lossy compression to a TIFF. (2) Layers: TIFFs can contain multiple layers and related info more layers means bigger file size. Obviously an uncompressed TIFF will be twice as large at 16 as at 8. (1) bit depth: TIFFs can be 16 bits per channel or 8 bits per channel. does anyone know of an alternative that will add a watermark and retain image quality and file size?Īssuming the pixel dimensions remain constant, three factors affect TIFF file size: I've gone back to the provider of the s/ware and asked the question, but I'm not hopeful for a positive "do this and it will work" response, so.
I select TIFF and the original TIFF (33MB) reduces to 7MB with a noticeable degradation in quality after applying watermark and saving. The s/ware I'm using (Visual Watermark Premium) has the option to save as JPEG, TIFF etc, after applying the watermark. I shoot in RAW (Canon 80D), I touch up in DPP4, save as a TIFF to retain as much image quality as possible and then I want to overlay a watermark.
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