Search found 56 matches

by BryantMoore
2012-04-17T18:08:18-07:00
Forum: Users
Topic: Resize using only certain pixels
Replies: 12
Views: 17066

Re: Resize using only certain pixels

The images I provided were meant to show an example of a group of colors from the source image and the final destination color. My source images are 15360x8640 and I wish for them to be downsized to 1920x1080. The reason I'm trying to use only certain pixels from the source image when resizing to th...
by BryantMoore
2012-04-17T17:44:52-07:00
Forum: Users
Topic: Resize using only certain pixels
Replies: 12
Views: 17066

Re: Resize using only certain pixels

Do you want the color corresponding to the black squares or all of the white area? Assuming the black, then color=`convert 8x8.png \( checker85.png -negate \) \ -alpha off -compose copy_opacity -composite \ -scale 1x1! -alpha off -format "%[pixel:u.p{0,0}]" info:` convert -size 128x128 xc:"$color" ...
by BryantMoore
2012-04-17T17:43:04-07:00
Forum: Users
Topic: Resize using only certain pixels
Replies: 12
Views: 17066

Re: Resize using only certain pixels

I'm trying to resize down not up, I enlarged the images so the pixels where easier to see.
by BryantMoore
2012-04-17T17:22:01-07:00
Forum: Users
Topic: Resize using only certain pixels
Replies: 12
Views: 17066

Re: Resize using only certain pixels

What I have is an image that is 64 times larger than the image I wish to end up with. So for each 8x8 area. http://ompldr.org/vZGV4cw/8x8.png I wish to use a mask such as this. http://ompldr.org/vZGV4dA/checker85.png And use the masked pixels to generate a final color value such as this in the resiz...
by BryantMoore
2012-04-17T15:54:03-07:00
Forum: Users
Topic: Resize using only certain pixels
Replies: 12
Views: 17066

Resize using only certain pixels

Is there a way to do this currently in ImageMagick? What I was thinking is that I could use a checker pattern as a mask to only take into account certain pixels when resizing, but the -mask parameter doesn't seem to allow for resizing.
by BryantMoore
2011-12-05T03:16:42-07:00
Forum: Users
Topic: Averaging a sequence 10 frames at a time
Replies: 9
Views: 29932

Re: Averaging a sequence 10 frames at a time

I had some help from a friend to write a Bash script which I execute through Cygwin.

Here is the resultant file. http://www.mediafire.com/?xcv0k805rnrjuqx
by BryantMoore
2011-12-02T15:03:09-07:00
Forum: Users
Topic: Averaging a sequence 10 frames at a time
Replies: 9
Views: 29932

Re: Averaging a sequence 10 frames at a time

I'm trying to average every 10 frames into a single frame. The idea is to convert 240fps into 24fps to achieve good motion blur. I see in that thread you have a script but I'm not sure how to apply it to my own situation as I'm not familiar with Linux shell scripting. I have Cygwin so I should be ab...
by BryantMoore
2011-12-02T12:56:14-07:00
Forum: Users
Topic: Averaging a sequence 10 frames at a time
Replies: 9
Views: 29932

Re: Averaging a sequence 10 frames at a time

I probably should have been more clear, I have over 1000 images to work with which I need to process in separate batches.
by BryantMoore
2011-12-02T04:08:55-07:00
Forum: Users
Topic: Averaging a sequence 10 frames at a time
Replies: 9
Views: 29932

Averaging a sequence 10 frames at a time

I have a sequence of TGA images recorded from a video game that I wish to convert to a lower frame rate by averaging adjacent images. I'm trying to do this to create temporally super-sampled motion blur. I only need to average 10 frames into 1 frame but I'm not sure how to go about writing a command...
by BryantMoore
2011-10-31T07:09:51-07:00
Forum: Digital Image Processing
Topic: Application of Jinc to texture filtering?
Replies: 7
Views: 22859

Application of Jinc to texture filtering?

I'm by no means a programmer, but I've been wondering how well true 2D radially symmetric resamplers like Jinc would benefit texture filtering for applications in 3D graphics such as video games. From what I understand, the fact that Jinc is radially symmetric is what eliminates aliasing over separa...
by BryantMoore
2011-04-23T22:34:09-07:00
Forum: Users
Topic: FFT in ImageMagick on Windows 7
Replies: 1
Views: 4176

FFT in ImageMagick on Windows 7

Is it necessary to compile ImageMagick from source in order to make use of -fft? I've never compiled a program before and I'm just wondering if there are builds of ImageMagick that come with it.

I'm on Windows 7, and my version is Version: ImageMagick 6.6.9-6 2011-04-14 Q8.