Legacy ImageMagick Discussions Archive

el_supremo

Two programmer errors methinks. This:

imagepixels[i*(number_wands-1) + j] = PixelGetAlpha(pixels[i]);

should be this:

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imagepixels[i*number_wands + j] = PixelGetAlpha(pixels[j]);

Pete

el_supremo

So I assume PixelGetBlack() would be the correct function for that What you need is PixelGetRed() (or Green() or Blue() since each pixel should have equal R, G and B values). [EDIT]: I thought you meant your image was already grayscale but perhaps it is colour and you want the grayscale value. If y...

el_supremo

First, you are missing a backslash in the pathname for convert - you need C:\Program Files\.... If that doesn't help then perhaps the space in "Program Files" is causing the system call to see only "C:\Program" as the first argument. In which case try copying convert.exe up to C:...

el_supremo

I'm not familiar with PHP but I think what might be happening is that the Gravity isn't being set and it therefore defaults to Northwest. This would then draw your text just above the top of the image so that it won't show. Try moving the text with: MagickAnnotateImage($mwand,$dwand,100,50,0,"F...

el_supremo

I think the problem is that in the second version you have images=ConstituteImage(...) but you don't destroy "images" later.

Pete

el_supremo

I think your original command is wrong but 6.1.7 must have ignored it. The -composite argument requires that you have already read in two images but you only read in rose: when you have the first -composite. Try this instead: convert rose: netscape: -compose Multiply -gravity center -composite -qual...

el_supremo

I require a different convert command variation. I thought that would be easy but can't get it to work the way I thought it would. I tried this: magick_wand = NewMagickWand() p_wand = NewPixelWand() PixelSetColor(p_wand,"white") MagickNewImage(magick_wand,1,400,p_wand) MagickReadImage(mag...

el_supremo

IIRC composite didn't work well in V6.0.x. I'm using 6.3.2 and your command produces a red shirt on a white background.
Upgrade your IM and then try the command again.

Pete

el_supremo

The bmp.c coder is reading the image's width and height as long integers but then casting them as (short) which will truncate 70000 to 4464. In bmp.c at line 639, this code: /* Microsoft Windows BMP image file. */ if (bmp_info.size < 40) ThrowReaderException(CorruptImageError,"NonOS2HeaderSizeE...

el_supremo

This combines the gray scale images into one rgb image:

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convert image_r.jpg image_g.jpg image_b.jpg -combine image_combo.jpg

Pete

el_supremo

In windows you need to use the double quote instead of the single quote:

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convert rose: -fx "xx=j&1?(w-1)-i:i; p{xx,j}" rose_lflip.png

Pete

el_supremo

convert requires the filename arguments in the reverse order. Try:

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convert C:\s_text.png C:\text.png -compose Overlay -composite C:\sh_text.png

Pete

el_supremo

After some trial and error, I found that with black and white images this convert command appears to do what you want:

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convert shirt.jpg image.jpg -compose multiply -composite result.jpg

[EDIT]: If you want the image to look like your example use SrcOver instead of multiply.

Pete

el_supremo

Try putting both <file> before -resize.
IM V6 changed the way commands are specified and that looks like it would have worked with V5 syntax.
Pete

el_supremo

I've done this. On the command line you use composite (not convert):

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composite left.jpg right.jpg -stereo anaglyph.jpg

In MagickWand (in C) you would use

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stereo_wand = MagickStereoImage(left_wand,right_wand);

Pete

Legacy ImageMagick Discussions Archive

Search found 1015 matches

Re: reading pixels from a ImageMagik image?

Re: reading pixels from a ImageMagik image?

Re: ImageMagick with php - system()

Re: Can't Get Text To Display When Annotating or Drawing

Re: MagickCore memory problem

Re: CLI composite confusion: works in 6.1.7, broke in 6.3.3

Re: Equivalent command in Magickwand for convert -resize

Re: Transparent PNG overlay onto colored background.

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Re: flipping every other line of pixel in an image

Re: Bug or not?

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Re: montage ... -transparent #COLOR failes to make color transpa

Re: anaglyph picture