How to correctly resize a .ico file without blurring it

[JoeShu95]

Hi there,

My application needs to resize .ico files, but it seems using the following command directly will blur the output to a great extent:

$ convert -resize 64x64 input.ico output.ico

I am using imagemagick on linux red hat 7. I searched all previous topics but didn't find anything related.

The sample image I used: http://www.iconarchive.com/download/i98 ... d/Xbox.ico

Thanks a lot!

[fmw42]

try

Code: Select all

convert input.ico -sample 64x64 output.ico

Proper syntax reads the input first.

[JoeShu95]

I tried, but it is still very blurry.

[JoeShu95]

try

Code: Select all

convert input.ico -sample 64x64 output.ico

I tried this command, but it is still very blurry, could you please help take a deeper look? Thank you!

[fmw42]

Try this

(unix syntax)

Code: Select all

convert input.ico -delete 1--1 \
\( -clone 0 -resize 16x16 \) \
\( -clone 0 -resize 32x32 \) \
\( -clone 0 -resize 48x48 \) \
\( -clone 0 -resize 64x64 \) \
-delete 0 -background none output.ico

or

(windows syntax)

Code: Select all

convert input.ico -delete 1--1 ^
( -clone 0 -resize 16x16 ) ^
( -clone 0 -resize 32x32 ) ^
( -clone 0 -resize 48x48 ) ^
( -clone 0 -resize 64x64 ) ^
-delete 0 -background none output.ico

Or just remove the higher resolution parts.

Code: Select all

convert input.ico -delete 0-3 -background none output.ico