MobileRead Forums - View Single Post - Using built-in imagemagick to crop an image

nasser · 08-07-2016, 06:59 AM

Success!
Got what I wanted..

Steps:

Install screensavers hack, if not already installed.
In Eboard Chess settings, untick the "Show Coordinates" option.
Play through a game, or set up a position using the scratch board option.
Touch opposite corners to capture the screen image. This will be saved in /mnt/us as "screenshot_2016..png".
Make some more positions and screenshot them, as required.
Create /mnt/us/images folder, if it doesn't exist already.
Open kindle explorer and rename the screenshots to something more convenient, as required.
Open kterm. Navigate to folder /mnt/us(this can be done directly in kindle explorer by touching the kterm icon).
Run command
Code:
```
for n in *.png; do /mnt/us/linkss/bin/convert $n -crop 617x617+2+39 /mnt/us/images/$n; done
```
This crops the screenshots and saves them under the same names in the /mnt/us/images folder. Note that the crop parameters are for a 212 ppi PW1. For 167ppi and 300ppi resolution kindles, the crop sizes and offsets will be different.

Sample before/after images attached.

Thanks to all for help!

08-07-2016, 06:59 AM	#10
nasser Evangelist Posts: 477 Karma: 445678 Join Date: Feb 2010 Device: Too many..	Success! Got what I wanted.. Steps: Install screensavers hack, if not already installed. In Eboard Chess settings, untick the "Show Coordinates" option. Play through a game, or set up a position using the scratch board option. Touch opposite corners to capture the screen image. This will be saved in /mnt/us as "screenshot_2016..png". Make some more positions and screenshot them, as required. Create /mnt/us/images folder, if it doesn't exist already. Open kindle explorer and rename the screenshots to something more convenient, as required. Open kterm. Navigate to folder /mnt/us(this can be done directly in kindle explorer by touching the kterm icon). Run command Code: for n in .png; do /mnt/us/linkss/bin/convert $n -crop 617x617+2+39 /mnt/us/images/$n; done This crops the screenshots and saves them under the same names in the /mnt/us/images folder. Note that the crop parameters are for a 212 ppi PW1. For 167ppi and 300ppi resolution kindles, the crop sizes and offsets will be different.* Sample before/after images attached. Thanks to all for help! Attached Thumbnails Last edited by nasser; 08-07-2016 at 09:12 AM.