-colors increase file size

[ad.aimm]

hello,

i'm trying to convert pdf to tiff and reduce tiff size. so i want to reduce color space to a little value but when i add -colors switch, file size increase.

for example (nconvert 6.3) :
nconvert -out tiff -c 8 -q 15 -dpi 150 -rmeta -autocontrast -autolevels -rtype lanczos -xall -multi -o d.tiff s.pdf = 212ko
nconvert -out tiff -c 8 -q 15 -dpi 150 -rmeta -autocontrast -autolevels -rtype lanczos -xall -multi -colors 16 -o d.tiff s.pdf = 1063ko

thx in advance,

regards,

ad.

[xnview]

-c 8 is for jpeg compression, so try -c 4 or -c 2

[ad.aimm]

hello,

thx you, it works fine with -c 2, -c 3 or -c 4, file is smaller now.

otherwise, can you tell me how use -noise switch to reduce noise ? because -noise reduce seems has no positive effect and add noise. is there a way to control the noise intensity ?

regards

[xnview]

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-noise reduce

[ad.aimm]

hi,

can we ajust noise reduction ? because -reduce noise is too strong.

regards,

ad

[cday]

The NConvert syntax can be obtained by typing the following code at the command prompt;

Code: Select all

nconvert -help

To save as a text file, type the following code at the command prompt.

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nconvert -help>filename.txt

Sorry, "-noise reduce" is not listed as having any alternative settings.