Legacy ImageMagick Discussions Archive

Good idea!

convert image.png image.tga

provided your version of IM supports png and tga.

convert -list format

must list tga and png

convert -list configure must have png or you will need to install the libpng delegate

see http://www.imagemagick.org/download/delegates/

I suggest you post your image so others can take a look at it

However once you have an image with only 16 colors, you cannot generate more colors by telling it -colors 256.

Perhaps I do not understand your problem. I took the rose: image and converted to 16-bit png. Then opened it in another program and converted it to 24-bits bmp (rose24.bmp) identify rose24.bmp rose24.bmp BMP 70x46 70x46+0+0 8-bit DirectClass 9.58kb (indeed when IM opens the file on Q16 environment i...

You realize that this is only an approximation even for a linear (equidistant) fisheye lens. The resulting panoram is equally spaced (pixels) in angular units and does not conform to true perspective geometry. If it is other formats such as equalarea (equisolid), orthographic and stereographic, you ...

In command line you can do it very easily by:

convert rose: -fx "i==10&&j=10?white:u" rose_changed.png

This will change pixel 10,10 to white and leave the remaining pixels unchanged.

documentation on Tif in IM is at http://www.imagemagick.org/Usage/formats/#tiff

I have now uploaded my script called polar. It does rect to polar and polar to rect. The names have to do with the mathematical description of the input and output images and not the way the images look, which one might think of as being reversed. Thus my names are just the opposite from what Photos...

GeorgeStone wrote: Will your new one be faster? No, the script has the same limitations as running it in command line. The only advantage is that I take care of all the parameter input to make it easier. Hmm, it just finished running and it didn't work It just kind of put half on one side, and half ...

Sorry, I completely missed the fact that I accidentally left of "info:" at the end of the histogram:

Just my oversight.

Sorry to have bothered you.

I am currently working on a script to do this (polar to rect and rect to polar). Should have it done in a day or so. Anthony and I am working on new distorts. Hopefully he can program this once I get the equations pinned down in my script and do some testing for proof of concept. But feel free to us...

IM 6.4.2-5 Q16 nonhdri Mac OSX 10.4.11 Tiger Getting a lot of junk after running a histogram. convert logo: -colors 16 -format %c histogram: id=ImageMagick version=1.0 class=DirectClass colors=16 matte=False columns=256 rows=200 depth=8 colorspace=RGB compression=Zip quality=0 resolution=72x72 page=...

when processing your image, you can force it to 8-bits by adding -depth 8

For tif you don't need adjoin, I don't think.

Have you tried

convert image1.tif image2.tif ... imageN.tif multiframe.tif

perhaps the inverted colors is due to +adjoin

But I have another issue, my background is always blank and not transparent, I forgot something ?? Your command is rather complex to understand, but in general to enable an image to be transparent you need to add -channel rgba -matte. I see the -matte, but not the -channel rgba and don't see either...