Search found 29 matches

by aigo
2017-08-03T03:22:39-07:00
Forum: Users
Topic: Questions about mean shift noise removal and color reduction
Replies: 0
Views: 4673

Questions about mean shift noise removal and color reduction

Hi again, I understand what the windows size does now, sorry about that. But, is it possible to specify the number of colors it can replace originals with (the number of colors in this case can be viewed as the number of clusters). Say, for example I select 5 colors then when computing the mean of e...
by aigo
2017-08-03T02:29:44-07:00
Forum: Users
Topic: New: mean shift noise removal and color reduction
Replies: 1
Views: 1684

New: mean shift noise removal and color reduction

Hello,
With respect to the windows size parameter, is that equivalent to the -resize <WxH> command?

If not, what does it do exactly?

Thanks.
by aigo
2017-08-01T15:45:27-07:00
Forum: Users
Topic: Mapping Central color to areas covered by edges
Replies: 10
Views: 4771

Re: Mapping Central color to areas covered by edges

Hi, my bad. what I aim to achieve is a skeleton-like mask of an image derived from the distribution of colours which can be used to create a representation of the original image but with one colour, for each area. Akin to the technique used in creating in cartoons I guess, where whole sections of an...
by aigo
2017-08-01T13:36:35-07:00
Forum: Users
Topic: Mapping Central color to areas covered by edges
Replies: 10
Views: 4771

Re: Mapping Central color to areas covered by edges

My IM version is 7.0.6-0 Q16 X86_64
by aigo
2017-08-01T13:34:00-07:00
Forum: Users
Topic: Mapping Central color to areas covered by edges
Replies: 10
Views: 4771

Mapping Central color to areas covered by edges

Hi Everyone, I am working on some images and would like to create an effect using an edge representation/skeleton of an image based on un-similar (unique) colours in the original image. After which I will like to superimpose this edge mask on the original image and color the individual areas, one co...
by aigo
2017-07-28T04:41:50-07:00
Forum: Users
Topic: Clarification on use of colours and depth in IM
Replies: 12
Views: 6095

Re: Clarification on use of colours and depth in IM

Hi snibgo,
Thank you so much for your clear explanations...
Aigo!
by aigo
2017-07-27T03:00:02-07:00
Forum: Users
Topic: Clarification on use of colours and depth in IM
Replies: 12
Views: 6095

Re: Clarification on use of colours and depth in IM

Thank you snibgo, I truly appreciate your feedback, kindly consider the following questions: Based on your explanation of -resize, we can also say that when an image has 100x100 pixels and is resized to 50x50, an approximation of the original image colours is performed where similar colours could en...
by aigo
2017-07-26T10:59:08-07:00
Forum: Users
Topic: Clarification on use of colours and depth in IM
Replies: 12
Views: 6095

Re: Clarification on use of colours and depth in IM

Hi snibgo, thank you so much for this suggested approach...I also noticed -depth applied just after -normalize affects (reduces) the number of colours as well. -resize actually increases the number of colours exponentially.. I just wonder if there is any scientific reason for this behaviour? Also, i...
by aigo
2017-07-25T23:10:33-07:00
Forum: Users
Topic: Clarification on use of colours and depth in IM
Replies: 12
Views: 6095

Re: Clarification on use of colours and depth in IM

no as .png..and yeah I count colours after the manipulation.
by aigo
2017-07-25T16:05:03-07:00
Forum: Users
Topic: Clarification on use of colours and depth in IM
Replies: 12
Views: 6095

Re: Clarification on use of colours and depth in IM

Oh so sorry..

I am using convert <input image> -colors <value> -colorspace RGB -normalize -depth <depth value> <output image>.

IM version 7.0.6-0 Q16
by aigo
2017-07-25T15:13:33-07:00
Forum: Users
Topic: Clarification on use of colours and depth in IM
Replies: 12
Views: 6095

Clarification on use of colours and depth in IM

Hi all, I have been playing around with IM recently especially with the color and depth option, and interestingly have discovered some things I can't explain but are important. 1. When specifying number of colors to use in an image say 4, I have discovered that the number of colors represented on th...
by aigo
2017-07-25T14:57:58-07:00
Forum: Users
Topic: How to use -magnify?
Replies: 5
Views: 5759

Re: How to use -magnify?

Thanks...Just seeing this reply, eventually had to call a script implementing the xBR algorithm. awesome result!
by aigo
2017-07-06T06:02:59-07:00
Forum: Users
Topic: How to use -magnify?
Replies: 5
Views: 5759

Re: How to use -magnify?

trying to use the same command by OP on IM version 7.0.06-0 and still get the same error. Is it discontinued in this version or an alternative exists? Please help!
by aigo
2017-06-27T04:26:16-07:00
Forum: Users
Topic: Aggressive Image size reduction via colour reduction
Replies: 1
Views: 1186

Aggressive Image size reduction via colour reduction

Hi all, I am a newbie to IM and trying to drastically reduce the size of images via colour reduction. Is it possible to do a many to one mapping (replacement) of colours in IM using either an inbuilt or user-defined colour space? Or is there a better way to do this (not colour reduction)? I have tri...