Legacy ImageMagick Discussions Archive

Hi, I confirm the image I uploaded was the original one (no IM command used before, it's a raw image). So, by only doing: convert myimage.tif output2.tif the result is as seen before; there is some kind of compression -> quality loss. Plus, there is some strange stripes at the right of the image ...

hmmm.... That's strange. I'll check that later on, but when I stretch the histogram to better see the original input image with Photoshop, it looks like the first previously shown jpg print screen. Then, when I use imagemagick (whatever command), the output looks like the second jpg print screen ...

Yes, it's what I meant: IM processing leads to "some kind" of quality loss with this 16-bit tif image file as input. The file I uploaded was the input. I'll double check that tomorrow but it's normally the input, not the output, so, whatever command, like a -convert crop (or, initially a -convert ...

Hi, here is a print screen of a zoom on a Photoshop window while the original image (the one the link targets in my previous post) was loaded: http://pix.toile-libre.org/upload/original/1481139934.jpg And here is a print screen of a zoom of the image resulting after some processing with -convert (e ...

Hi, Focus only on the quality loss as it's my main concern now. In fact, even a simple IM command leads to a loss of quality on my 16bit tif images. Here is a sample: http://pix.toile-libre.org/upload/original/1481059547.png You must change the extension to .tif instead of .png after download ...

Thanks, I'll try it tomorrow, on bash/unix it doesn't work (syntax error). I hope it will works fine on the Windows machine.

Question: what if the offset are negative?
Because it may be the case sometimes...

Hi, I have 3 questions. 1. I have 3 separate tif images (16-bit pixel depth each) representing data acquired with a scanner. Every single file is a grayscale image corresponding to only one of three R, G and B channels: RED.tif, GRN.tif, BLU.tif (in fact there is a 4th image acquired within near ...

Hi. The first ( GeeMack ) of the two previous solution doesn't work. I ended with the exact same result as before. The second ( fmw42 ) leads to an almost transparent image (who weights 1.0 Mo). So it doesn't work either. Here is what it should look like : http://pix.toile-libre.org/upload/original ...

Hi. I have a 16-bit depth tif image with 4 channels (each channel is 16-bit). "identify" says it's a sRGB image. No problem till here. Theses channels are "automatically" detected by image software like Photoshop as RGBA, in this precise order. It's natural to all conventional images. But in fact my ...

Hi again, Ok, thanks for all your answers ! I had a great time... :D Now working with IM : Version: ImageMagick 6.8.5-6 2013-05-19 Q16 So... 1. Snibgo : convert test.jpg -profile sRGB.icc tx.png This command seems to need a file called sRGB.icc. I haven't found such a file on my Ubuntu, so I picked ...

Hello again. (Minimal working example below) Ok, so, I have removed the installed IM version with : $ sudo remove --purge imagemagick before re-installing it, after downloading it from a mirror here : http://www.imagemagick.org/script/download.php , with these commands on the extracted files : $ cd ...

Hi Snibgo,
thanks for the answer.
Before uploading all the pics, do you have any clue on "how" I can upgrade IM ?
Is there any official PPA that I missed, somewhere ? Or any deb package ?

Thanks again.

Hi everybody, I'm trying to overlay two *.jpg images; The first one is a photo. The second is created within IM by using a convert command with -sparse-color over a series of RGB values and X,Y coordinates. This second image is bigger (higher and wider). Using bash, I tried to place the photo over ...

Hello, I'm using bash on Linux to do some stuff on my pictures and I've got a small issue with convert and the -sparse-color option. :( When calling -sparse-color like this, it works like a charm : $ convert -size 900x900 xc: -sparse-color Shepards \ '150,150 rgb(0,255,255) 150,450 rgb(1,5,5) 150 ...