How to fade images to blue with image magic?

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Much like this question 3, im trying to achieve a fade but to a constant color rather than fade to transparent, how can the fade at all the edges, go to blue rather than to transparent? I have tried the following:

convert doge.png -alpha set -virtual-pixel transparent -background blue  -channel A -morphology Distance Euclidean:1,20\! +channel _doge.png
convert doge.png -alpha set -virtual-pixel Blue  -channel A -morphology Distance Euclidean:1,20\! +channel _doge.png

unsuccessfully. I also considered vignette 4 which it turns out produces very stretched ovals on my very rectangular images, making them unattractive, therefore i have a need to keep the fade to black rectangular, if i can use this fade to produce a fade to black it would suffice.

with the first command i get this, before and after: , The second command errs out with this error:

convert: unrecognized virtual pixel method `Blue' @ error/convert.c/ConvertImageCommand/3177.

Your doing the morphology on the Alpha channel, but what about just the Red & Green channels.

 convert doge.png -alpha set -virtual-pixel transparent -background blue \
         -channel RG -morphology Distance Euclidean:1,20\! +channel _doge.png

ImageMagick v6 Examples, Adaptively blur pixels, with decreasing effect near edges. See Image Geometry for complete details about the geometry argument. -blue-shift factor. simulate  That will fade the image to black by overlaying a 50% transparent black. It also will not 'fade' any fully-transparent areas in the image toward black. See IM examples, Colorize A more controls greyscale fading can be achieved using Reversed Level Adjustments

A slight variation to emcconville's excellent Imagemagick answer is to keep the transparency and just flatten against blue.

convert doge.png \
-alpha set -virtual-pixel transparent -channel A -morphology Distance Euclidean:1,20\! +channel  \
-background blue -compose over -flatten \
result.png

Command-line Options, -blue-shift factor, simulate a scene at nighttime in the moonlight. -blur geometry, reduce image noise and reduce detail levels. -border geometry, surround image​  When I run that on IM 7.0.0.0, the output image looks identical to the input image – Mark K Cowan Nov 22 '15 at 16:50 This is a 4 year old answer. Back then it worked.

Several good answers have been provided above, but here's a slightly different approach. Read the input image, clone it, colorize it black, shave it some and add a blue border, make the black transparent, blur the blue border, and composite that over the original input. A command might look something like this...

convert input.png -bordercolor blue -fill black \
   \( +clone -colorize 100 -shave 10 -border 10 \
   -transparent black -blur 0x10 \) -composite result.png

Command-line Tools: Convert, Adjustments Using Histogram Modification (changing the histogram an image) It does not matter if the image is bright, or dark, or has a blue, or yellow tint. Finally ' Spline ' will blur the colors, and may not generate any of the colors in the​  With ImageMagick you can create images dynamically, making it suitable for Web applications. You can also resize, rotate, sharpen, color reduce, or add special effects to an image or image sequence and save your completed work in the same or differing image format.

You can do that by the following in Imagemagick 6. I create a black image and blur the edges linearly rather than by a gaussian blur. Then I use that as a mask to blend the image with a blue image to make the results.

convert doge.png \
\( -clone 0 -fill blue -colorize 100 \) \
\( -clone 0 -fill black -colorize 100 -virtual-pixel white -blur 100x65000 \) \
-compose over -composite \
result.png

You can also use a gaussian-like blur as follows:

convert doge.png \
\( -clone 0 -fill blue -colorize 100 \) \
\( -clone 0 -fill black -colorize 100 -virtual-pixel white -blur 0x50 \) \
-compose over -composite \
result2.png

Here is a smaller blur distance:

convert doge.png \
\( -clone 0 -fill blue -colorize 100 \) \
\( -clone 0 -fill black -colorize 100 -virtual-pixel white -blur 20x65000 \) \
-compose over -composite \
result3.png

If you want it more deep blue, then you can control that with the -level operator:

convert doge.png \
\( -clone 0 -fill blue -colorize 100 \) \
\( -clone 0 -fill black -colorize 100 -virtual-pixel white -blur 20x65000 -level 0x50% \) \
-compose over -composite \
result4.png

For Imagemagick 7, use magick rather than convert.

Color Modifications -- IM v6 Examples, How to make blur with transparency but to keep the colors as they are blue shirt and yellow pants) and i need to make smooth antialiasing  If you want to fade the first photo into another photo, do the following: Drag another photo into the main Photoshop window, then drop it there. Click the photo, then click Place when prompted. Click and drag the first photo's layer to the top of the "Layers" menu. Adjust the first photo's opacity as needed.

Blurring color images with transparency, Each image pixel is represented by red, green, and blue levels (which are equal for a By treating the alpha channel as a visual "mask" the rectangular image may be A Variable Blur Mapping Composition method, where each pixel in the​  Edit Edges - Fade, Crop & Overlay. Brushstrokes Color Scratches Corner Editor Fade-out Focus Shape Editor Star Mask Stardust Swirl Swirly Colors Vignette Editor Wirl Effect. Recolor, Tone, add FX. Lomo Effect Dreamy Blend Color Swap Pencil Sketch Photo to Painting Sepia Tone Tritone Filter Heatmap Retro Effect Nightvision Color Noise Ghostify.

Alpha Compositing, convert -size 100x100 gradient:blue gradient_range1.jpg convert -size 100x100 Using a high power function, you can give photos a fade off effect around the  Turn your pictures into a realistic blueprint. Great effect to illustrate technical articles and presentations. Recolor, Tone, add FX. Lomo Effect Dreamy Blend Color Swap Pencil Sketch Photo to Painting Sepia Tone Tritone Filter Heatmap Retro Effect Nightvision Color Noise Ghostify. Edit Edges - Fade, Crop & Overlay.

Canvas Creation -- IM v6 Examples, The transparency (alpha) channel of an image is completely optional, and often requires special For example the Resize Halo Bug, and the Blur with Transparency Bug. convert alpha_extract.png +level-colors Blue,Yellow level_color.png  Icon Bar Menu Icon Accordion Tabs Vertical Tabs Tab Headers Full Page Tabs Hover Tabs Top Navigation Responsive Topnav Navbar with Icons Search Menu Search Bar Fixed Sidebar Side Navigation Responsive Sidebar Fullscreen Navigation Off-Canvas Menu Hover Sidenav Buttons Sidebar with Icons Horizontal Scroll Menu Vertical Menu Bottom Navigation Responsive Bottom Nav Bottom Border Nav Links Right Aligned Menu Links Centered Menu Link Equal Width Menu Links Fixed Menu Slide Down Bar on Scroll Hide

Comments
  • A before and after image would help.
  • @MarkSetchell there you go
  • I thought you wanted to fade to blue?
  • yes, there lies the problem, its not fading to blue, but to transparent! how do i make image magic fade to a color rather than to transparent