Search found 6 matches

by JamieG
2016-05-26T01:46:38-07:00
Forum: Consulting
Topic: PAID : Help removing edge anti-aliasing when increasing canvas size
Replies: 13
Views: 24860

Re: PAID : Help removing edge anti-aliasing when increasing canvas size

Thanks again fmw42. I tried the trim idea and it didn't yield the desired result. I think it will be useful to sketch what I'm trying to achieve as follows: http://youpresent.co.uk/temp/IM%20thumbnail%20process.png I'm starting to think that what I want to do isn't possible because it implies proces...
by JamieG
2016-05-25T13:27:55-07:00
Forum: Consulting
Topic: PAID : Help removing edge anti-aliasing when increasing canvas size
Replies: 13
Views: 24860

Re: PAID : Help removing edge anti-aliasing when increasing canvas size

If the problem is that the alpha channel is grayscale (for the anti-aliasing), then make the alpha channel binary. See if this helps. convert IM-2000x2000-JPG.png -channel alpha -threshold 50% +channel IM-2000x2000-JPG2.png or convert IM-2000x2000-JPG.png -channel alpha -threshold 0 +channel IM-200...
by JamieG
2016-05-25T03:19:12-07:00
Forum: Consulting
Topic: PAID : Help removing edge anti-aliasing when increasing canvas size
Replies: 13
Views: 24860

Re: PAID : Help removing edge anti-aliasing when increasing canvas size

Not sure I fully understand your problem without seeing the actual source file. But if you are adding a transparent border to a JPG and then resizing and saving as JPG, you will get a black border, since JPG does not support transparency. It therefore turns off the transparency, leaving the black u...
by JamieG
2016-05-25T02:19:29-07:00
Forum: Consulting
Topic: PAID : Help removing edge anti-aliasing when increasing canvas size
Replies: 13
Views: 24860

Re: PAID : Help removing edge anti-aliasing when increasing canvas size

2. Re-write the command in the proper order: read the input, then do the operations, then write the output, eg convert SrcImg -matte -bordercolor none -border "10%" -resize "100x100>" -background none -compose copy -gravity center -extent "100x100" -quality "100" TgtImg Doh! I've no idea why that o...
by JamieG
2016-05-25T02:13:32-07:00
Forum: Consulting
Topic: PAID : Help removing edge anti-aliasing when increasing canvas size
Replies: 13
Views: 24860

Re: PAID : Help removing edge anti-aliasing when increasing canvas size

Good morning experts. Thank you all for the replies. I have uploaded some test images as follows: 1. PPT-2000x2000-PNG.png = Programmatic export of the PNG version of the logo from PowerPoint to a PNG file = source 1 for ImageMagick http://youpresent.co.uk/temp/PPT-2000x2000-PNG.png 2. PPT-2000x2000...
by JamieG
2016-05-24T02:38:24-07:00
Forum: Consulting
Topic: PAID : Help removing edge anti-aliasing when increasing canvas size
Replies: 13
Views: 24860

PAID : Help removing edge anti-aliasing when increasing canvas size

Hi expert members, I am using the Windows distribution and calling the convert exe to perform a number of operations on PNG images summarised as follows: 1. Size to a pre-specified size, maintaining aspect ratio 2. When the canvas increases, set the new parts of the background to 100% transparent 3....