[magick-users] Same number of Tile for different picture: How ?

[Prasad Burra]

Hi all,

I have a Picture.png.

I used 'convert' to scale it down and called it Picture30.png

I want to crop Picture.png and Picture30.png into same number of pieces.

i.e. The number of Pieces from both the above pictures should be same.

I tried the following :

convert -crop 20% Picture.png    // this results in 33 cropped / tiled peices
convert -crop 20% Picture30.png  // this resulted in 29 cropped / tiled peices.

The relation between Picture.png and Picture30.png is

convert -scale 30% Picture.png Picture30.png

can some body help me with this. ??
thank you very much in advance.

regards,
Prasad.