Legacy ImageMagick Discussions Archive

The exposure varies across the images, so you don't know what levels are best. Instead, I'd use "-contrast-stretch", eg: And "+repage" might be useful.

Here's a standard deviation version of the entropy map, though I don't claim that it is better: "%IMG%convert" map_a4_south_jungle.png ^ ( +clone -channel RGB -separate +channel ^ -statistic standard-deviation 2x2 ^ -compose plus -flatten -compose over ) ^ -delete 0 ^ -threshold 50%% ^ map...

A large fuzz does the trick.

Good stuff. I should add: IM has changed considerably since 6.4.0. In particular, it now assumes input and output images are sRGB ("non-linear"), but monochrome images (including separations) are RGB ("linear"). See any number of threads here where people have upgraded and the re...

You can probably figure out for yourself more than I know, but the basic idea is: - If you are happy installing from source, that's fine. - The binary Windows release works fine under Cygwin. By default, it installs into "\program files (x86)" or somwhere horrible, but you can change that,...

For some reason, the version of IM distributed with the current Cygwin is very dated, and somewhat broken in terms of RGB/sRGB. Junk it, and install the current version.

On IM v6.7.9 and 6.8.1, on Windows 7, I get a different output to you. What version are you on? I am still unclear what edge result you want. The edges in your "manual" version (which I can get close to with "-morphology dilate disk:8") don't look like what I get with "-scal...

The PDF converts fine on my laptop without any options. Each page is then 612x792 pixels. It fails with "-density 300". 115 pages: 56 M pixels. Density 300 will multiply this by about 4x4, or 892 M pixels. At 6 bytes per pixel, this needs 5 GB of memory. Is your computer, like mine, too sm...

identify -verbose x.jpg or identify -format "%Q" x.jpg Never forget that reading then writing a jpeg will reduce its quality, so an image saved at 80 then read and saved as 80 again, will look worse after the second save. Also, the algorithm used by IM may differ from that used in the cam...

I don't have this coder. What exact command results in the error? Perhaps the command is broken.

You might try to convert each one. If the return code ("errorlevel" in Windows) is non-zero, or you don't get a resulting image, the input was broken.

I don't know PHP, but it may allow piping, as in the command... ... where something has piped the SVG contents to stdout.

I don't use PHP, and don't know what "GD" is. In general, using more tools (such as a web browser with PHP interpreter) will also use more resources.

The delay is shown as {ticks}x{ticks-per-seconds}. See http://www.imagemagick.org/script/command-line-options.php#delay So "5x100" means 5 hundredths of a second, 0.05s. If all the frames have this delay, then you have a steady framerate, which is 100/5 = 20 frames per second. ffmpeg can c...

Add the delays to get the total duration. Calculate the average delay for a framerate. GIF files don't have a steady framerate. To get an MP4 from a GIF, you should replicate frames as needed so each one is on screen for the same time. I don't know if ffmpeg can do this automatically. If not, you co...