Im trying to make Thumbnail pics -- any suggestions?

ruby-talk
1

Im trying to make Thumbnail pics -- any suggestions? (dont know wher
to start)

2

Use rmagick which is a sort of a ruby binding on ImageMagick and
grpahicsmagick

···

On Nov 28, 2007 11:05 PM, <wiz_pendases@yahoo.com> wrote:

Im trying to make Thumbnail pics -- any suggestions? (dont know wher
to start)

3

wiz_pendases@yahoo.com wrote:

Im trying to make Thumbnail pics -- any suggestions? (dont know wher
to start)

# Make Thumb Nails
# This works fine to make thumbnails for my web site
# lots of luck
#Tom Reilly

require 'rmagick'
include Magick

def rsz(hgt,wdt,msze)
    if hgt > wdt
        r = msze.to_f / hgt.to_f
        return [ msze, (wdt.to_f * r).to_i]
    else
        r = msze.to_f / wdt.to_f
        return [(hgt.to_f * r).to_i, msze]
    end
end

tnDir = ".\\"
jpgArray = Array.new
dir = Dir.new(tnDir)
dir.each do |d|
    jpgArray.push(d) if d =~ /jpg/
end

pix = ImageList.new
jpgArray.each {|x| pix.read(x) if x .downcase =~ /jpg/}

pix.each do |x|
       rows = x.rows
    columns = x.columns
    factor1 = 200
    factor2 = 450
    a = rsz(columns,rows,factor1)
      x.resize!(a[0],a[1])
        #img.resize!(cols,rows)
# img2 = x.frame
        x.write(".\\stamp\\#{"t" + x.filename}")
end

4

I am using rmagick. However, I hear good things about imagescience if your needs featurewise are more modest.
Sent wirelessly via BlackBerry from T-Mobile.

···

-----Original Message-----
From: "Piyush Ranjan" <piyush.pr@gmail.com>

Date: Thu, 29 Nov 2007 02:45:04
To:ruby-talk@ruby-lang.org (ruby-talk ML)
Subject: Re: Im trying to make Thumbnail pics -- any suggestions?

Use rmagick which is a sort of a ruby binding on ImageMagick and
grpahicsmagick

On Nov 28, 2007 11:05 PM, <wiz_pendases@yahoo.com> wrote:

Im trying to make Thumbnail pics -- any suggestions? (dont know wher
to start)

5

Or ImageScience or the epeg library

···

On Nov 28, 2007, at 10:45 AM, Piyush Ranjan wrote:

Use rmagick which is a sort of a ruby binding on ImageMagick and
grpahicsmagick

6

Blech!

This is exactly why I wrote image_science... well, that and installing ImageMagick/rmagick was always a PITA.

require 'rubygems'
require 'image_science'

Dir["*.jpg"].each do |file|
   ImageScience.with_image(file) do |img|
     img.thumbnail(200) do |thumb|
       thumb.save "#{file.sub(/.jpg$/, '')}_thumb.png"
     end
   end
end

···

On Nov 28, 2007, at 15:01 , Tom Reilly wrote:

# Make Thumb Nails
# This works fine to make thumbnails for my web site
# lots of luck
#Tom Reilly

require 'rmagick'
include Magick

def rsz(hgt,wdt,msze)
  if hgt > wdt
      r = msze.to_f / hgt.to_f
      return [ msze, (wdt.to_f * r).to_i]
  else
      r = msze.to_f / wdt.to_f
      return [(hgt.to_f * r).to_i, msze]
  end
end

tnDir = ".\\"
jpgArray = Array.new
dir = Dir.new(tnDir)
dir.each do |d|
  jpgArray.push(d) if d =~ /jpg/
end

pix = ImageList.new
jpgArray.each {|x| pix.read(x) if x .downcase =~ /jpg/}

pix.each do |x|
    rows = x.rows
  columns = x.columns
  factor1 = 200
  factor2 = 450
  a = rsz(columns,rows,factor1)
   x.resize!(a[0],a[1])
      #img.resize!(cols,rows)
# img2 = x.frame
      x.write(".\\stamp\\#{"t" + x.filename}")
end

7

Very cool :slight_smile:

I'm ok with the ruby, but how would you put that *into* a rails project
so that the above code is run when the new images are imported to the db?

thanks,

Thufir

···

On Thu, 29 Nov 2007 09:29:25 +0900, Ryan Davis wrote:

require 'rubygems'
require 'image_science'

Dir["*.jpg"].each do |file|
   ImageScience.with_image(file) do |img|
     img.thumbnail(200) do |thumb|
       thumb.save "#{file.sub(/.jpg$/, '')}_thumb.png"
     end
   end
end

8

Have a look at the attachment_fu plugin:

http://svn.techno-weenie.net/projects/plugins/attachment_fu/

Regards,
Andy Stewart

···

On 29 Nov 2007, at 02:30, Thufir wrote:

On Thu, 29 Nov 2007 09:29:25 +0900, Ryan Davis wrote:

require 'rubygems'
require 'image_science'

Dir["*.jpg"].each do |file|
   ImageScience.with_image(file) do |img|
     img.thumbnail(200) do |thumb|
       thumb.save "#{file.sub(/.jpg$/, '')}_thumb.png"
     end
   end
end

Very cool :slight_smile:

I'm ok with the ruby, but how would you put that *into* a rails project
so that the above code is run when the new images are imported to the db?

-------

9

Put things like that into the Model file.

···

On Nov 28, 2007, at 8:30 PM, Thufir wrote:

Very cool :slight_smile:

I'm ok with the ruby, but how would you put that *into* a rails project
so that the above code is run when the new images are imported to the db?

thanks,

Thufir

10

you can also use filecolumn for rails file upload and thumbnailing needs.

···

On Nov 29, 2007 5:30 PM, John Joyce <dangerwillrobinsondanger@gmail.com> wrote:

On Nov 28, 2007, at 8:30 PM, Thufir wrote:
>
> Very cool :slight_smile:
>
>
> I'm ok with the ruby, but how would you put that *into* a rails
> project
> so that the above code is run when the new images are imported to
> the db?
>
>
>
> thanks,
>
> Thufir
>
>

Put things like that into the Model file.