Class: Magick::Image
- Inherits:
-
Object
- Object
- Magick::Image
- Includes:
- Comparable
- Defined in:
- lib/RMagick.rb,
ext/RMagick/rmmain.c
Overview
Ruby-level Magick::Image methods
Defined Under Namespace
Classes: DrawOptions, Info, PolaroidOptions, View
Class Method Summary collapse
- ._load ⇒ Object
- .capture ⇒ Object
- .constitute ⇒ Object
- .from_blob ⇒ Object
- .new ⇒ Object
- .ping ⇒ Object
- .read ⇒ Object
- .read_inline ⇒ Object
Instance Method Summary collapse
- #<=> ⇒ Object
- #[] ⇒ Object
- #[]= ⇒ Object
- #_dump ⇒ Object
- #adaptive_blur ⇒ Object
- #adaptive_blur_channel ⇒ Object
- #adaptive_resize ⇒ Object
- #adaptive_sharpen ⇒ Object
- #adaptive_sharpen_channel ⇒ Object
- #adaptive_threshold ⇒ Object
- #add_noise ⇒ Object
- #add_noise_channel ⇒ Object
- #add_profile ⇒ Object
- #affine_transform ⇒ Object
-
#annotate(draw, width, height, x, y, text, &block) ⇒ Object
Provide an alternate version of Draw#annotate, for folks who want to find it in this class.
- #auto_orient ⇒ Object
- #auto_orient! ⇒ Object
- #bilevel_channel ⇒ Object
- #black_threshold ⇒ Object
- #blend ⇒ Object
- #blur_channel ⇒ Object
- #blur_image ⇒ Object
- #border ⇒ Object
- #border! ⇒ Object
- #change_geometry ⇒ Object
- #change_geometry! ⇒ Object
- #changed? ⇒ Boolean
- #channel ⇒ Object
-
#channel_compare ⇒ Object
An alias for compare_channel.
- #channel_depth ⇒ Object
- #channel_extrema ⇒ Object
- #channel_mean ⇒ Object
- #channel_threshold ⇒ Object
- #charcoal ⇒ Object
- #chop ⇒ Object
- #clone ⇒ Object
-
#color_fill_to_border(x, y, fill) ⇒ Object
Set all pixels that are neighbors of x,y and are not the border color to the fill color.
- #color_flood_fill ⇒ Object
-
#color_floodfill(x, y, fill) ⇒ Object
Set all pixels that have the same color as the pixel at x,y and are neighbors to the fill color.
- #color_histogram ⇒ Object
-
#color_point(x, y, fill) ⇒ Object
Set the color at x,y.
-
#color_reset!(fill) ⇒ Object
Set all pixels to the fill color.
- #colorize ⇒ Object
- #colormap ⇒ Object
- #compare_channel ⇒ Object
- #composite ⇒ Object
- #composite! ⇒ Object
- #composite_affine ⇒ Object
- #composite_channel ⇒ Object
- #composite_channel! ⇒ Object
- #compress_colormap! ⇒ Object
- #contrast ⇒ Object
- #contrast_stretch_channel ⇒ Object
- #convolve ⇒ Object
- #convolve_channel ⇒ Object
- #copy ⇒ Object
- #crop ⇒ Object
- #crop! ⇒ Object
-
#crop_resized(ncols, nrows, gravity = CenterGravity) ⇒ Object
Force an image to exact dimensions without changing the aspect ratio.
- #crop_resized!(ncols, nrows, gravity = CenterGravity) ⇒ Object
-
#cur_image ⇒ Object
Used by ImageList methods - see ImageList#cur_image.
- #cycle_colormap ⇒ Object
- #delete_profile ⇒ Object
- #despeckle ⇒ Object
- #difference ⇒ Object
- #dispatch ⇒ Object
- #displace ⇒ Object
- #display ⇒ Object (also: #__display__)
- #dissolve ⇒ Object
- #distortion_channel ⇒ Object
- #dup ⇒ Object
-
#each_iptc_dataset ⇒ Object
Iterate over IPTC record number:dataset tags, yield for each non-nil dataset.
- #each_profile ⇒ Object
- #edge ⇒ Object
- #emboss ⇒ Object
- #enhance ⇒ Object
- #equalize ⇒ Object
- #erase! ⇒ Object
- #export_pixels ⇒ Object
- #export_pixels_to_str ⇒ Object
- #find_similar_region ⇒ Object
- #flip ⇒ Object
- #flip! ⇒ Object
- #flop ⇒ Object
- #flop! ⇒ Object
- #frame ⇒ Object
- #gamma_channel ⇒ Object
- #gamma_correct ⇒ Object
- #gaussian_blur ⇒ Object
- #gaussian_blur_channel ⇒ Object
-
#get_exif_by_entry(*entry) ⇒ Object
Retrieve EXIF data by entry or all.
-
#get_exif_by_number(*tag) ⇒ Object
Retrieve EXIF data by tag number or all tag/value pairs.
-
#get_iptc_dataset(ds) ⇒ Object
Retrieve IPTC information by record number:dataset tag constant defined in Magick::IPTC, above.
- #get_pixels ⇒ Object
- #gray? ⇒ Boolean
- #grayscale_pseudo_class ⇒ Object
- #grey? ⇒ Boolean
- #implode ⇒ Object
- #import_pixels ⇒ Object
- #initialize ⇒ Object constructor
- #initialize_copy ⇒ Object
- #inspect ⇒ Object
-
#level(black_point = 0.0, white_point = nil, gamma = nil) ⇒ Object
(Thanks to Al Evans for the suggestion.).
- #level2 ⇒ Object
- #level_channel ⇒ Object
- #linear_stretch ⇒ Object
- #magnify ⇒ Object
- #magnify! ⇒ Object
- #map ⇒ Object
-
#matte_fill_to_border(x, y) ⇒ Object
Make transparent any neighbor pixel that is not the border color.
- #matte_flood_fill ⇒ Object
-
#matte_floodfill(x, y) ⇒ Object
Make transparent any pixel that matches the color of the pixel at (x,y) and is a neighbor.
-
#matte_point(x, y) ⇒ Object
Make the pixel at (x,y) transparent.
-
#matte_replace(x, y) ⇒ Object
Make transparent all pixels that are the same color as the pixel at (x, y).
-
#matte_reset! ⇒ Object
Make all pixels transparent.
- #median_filter ⇒ Object
- #minify ⇒ Object
- #minify! ⇒ Object
- #modulate ⇒ Object
- #monochrome? ⇒ Boolean
- #motion_blur ⇒ Object
- #negate ⇒ Object
- #negate_channel ⇒ Object
- #normalize ⇒ Object
- #normalize_channel ⇒ Object
- #oil_paint ⇒ Object
- #opaque ⇒ Object
- #opaque? ⇒ Boolean
- #ordered_dither ⇒ Object
- #palette? ⇒ Boolean
- #pixel_color ⇒ Object
- #polaroid ⇒ Object
- #posterize ⇒ Object
-
#preview ⇒ Object
rb_define_method(Class_Image, “plasma”, Image_plasma, 6);.
- #profile! ⇒ Object
- #properties ⇒ Object
- #quantize ⇒ Object
- #quantum_operator ⇒ Object
- #radial_blur ⇒ Object
- #radial_blur_channel ⇒ Object
- #raise ⇒ Object
- #random_channel_threshold ⇒ Object
- #random_threshold_channel ⇒ Object
- #recolor ⇒ Object
- #reduce_noise ⇒ Object
-
#resample(x_res = 72.0, y_res = nil) ⇒ Object
Corresponds to ImageMagick’s -resample option.
- #resize ⇒ Object
- #resize! ⇒ Object
-
#resize_to_fit(cols, rows) ⇒ Object
Convenience method to resize retaining the aspect ratio.
- #resize_to_fit!(cols, rows) ⇒ Object
- #roll ⇒ Object
- #rotate ⇒ Object
- #rotate! ⇒ Object
- #sample ⇒ Object
- #sample! ⇒ Object
- #scale ⇒ Object
- #scale! ⇒ Object
- #segment ⇒ Object
- #sepiatone ⇒ Object
- #set_channel_depth ⇒ Object
- #shade ⇒ Object
- #shadow ⇒ Object
- #sharpen ⇒ Object
- #sharpen_channel ⇒ Object
- #shave ⇒ Object
- #shave! ⇒ Object
- #shear ⇒ Object
- #sigmoidal_contrast_channel ⇒ Object
- #signature ⇒ Object
- #sketch ⇒ Object
- #solarize ⇒ Object
- #splice ⇒ Object
- #spread ⇒ Object
- #statistics ⇒ Object
- #stegano ⇒ Object
- #stereo ⇒ Object
- #store_pixels ⇒ Object
- #strip! ⇒ Object
- #swirl ⇒ Object
-
#texture_fill_to_border(x, y, texture) ⇒ Object
Replace neighboring pixels to border color with texture pixels.
- #texture_flood_fill ⇒ Object
-
#texture_floodfill(x, y, texture) ⇒ Object
Replace matching neighboring pixels with texture pixels.
- #threshold ⇒ Object
- #thumbnail ⇒ Object
- #thumbnail! ⇒ Object
- #tint ⇒ Object
- #to_blob ⇒ Object
- #to_color ⇒ Object
- #transparent ⇒ Object
- #transpose ⇒ Object
- #transpose! ⇒ Object
- #transverse ⇒ Object
- #transverse! ⇒ Object
- #trim ⇒ Object
- #trim! ⇒ Object
- #unique_colors ⇒ Object
- #unsharp_mask ⇒ Object
- #unsharp_mask_channel ⇒ Object
-
#view(x, y, width, height) ⇒ Object
Construct a view.
- #vignette ⇒ Object
- #watermark ⇒ Object
- #wave ⇒ Object
- #wet_floor ⇒ Object
- #white_threshold ⇒ Object
- #write ⇒ Object
Constructor Details
#initialize ⇒ Object
Class Method Details
._load ⇒ Object
.capture ⇒ Object
.constitute ⇒ Object
.from_blob ⇒ Object
.new ⇒ Object
.ping ⇒ Object
.read ⇒ Object
.read_inline ⇒ Object
Instance Method Details
#<=> ⇒ Object
#[] ⇒ Object
#[]= ⇒ Object
#_dump ⇒ Object
#adaptive_blur ⇒ Object
#adaptive_blur_channel ⇒ Object
#adaptive_resize ⇒ Object
#adaptive_sharpen ⇒ Object
#adaptive_sharpen_channel ⇒ Object
#adaptive_threshold ⇒ Object
#add_noise ⇒ Object
#add_noise_channel ⇒ Object
#add_profile ⇒ Object
#affine_transform ⇒ Object
#annotate(draw, width, height, x, y, text, &block) ⇒ Object
Provide an alternate version of Draw#annotate, for folks who want to find it in this class.
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# File 'lib/RMagick.rb', line 708 def annotate(draw, width, height, x, y, text, &block) draw.annotate(self, width, height, x, y, text, &block) self end |
#auto_orient ⇒ Object
#auto_orient! ⇒ Object
#bilevel_channel ⇒ Object
#black_threshold ⇒ Object
#blend ⇒ Object
#blur_channel ⇒ Object
#blur_image ⇒ Object
#border ⇒ Object
#border! ⇒ Object
#change_geometry ⇒ Object
#change_geometry! ⇒ Object
#changed? ⇒ Boolean
#channel ⇒ Object
#channel_compare ⇒ Object
An alias for compare_channel
#channel_depth ⇒ Object
#channel_extrema ⇒ Object
#channel_mean ⇒ Object
#channel_threshold ⇒ Object
#charcoal ⇒ Object
#chop ⇒ Object
#clone ⇒ Object
#color_fill_to_border(x, y, fill) ⇒ Object
Set all pixels that are neighbors of x,y and are not the border color to the fill color
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# File 'lib/RMagick.rb', line 729 def color_fill_to_border(x, y, fill) color_flood_fill(border_color, fill, x, y, Magick::FillToBorderMethod) end |
#color_flood_fill ⇒ Object
#color_floodfill(x, y, fill) ⇒ Object
Set all pixels that have the same color as the pixel at x,y and are neighbors to the fill color
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# File 'lib/RMagick.rb', line 722 def color_floodfill(x, y, fill) target = pixel_color(x, y) color_flood_fill(target, fill, x, y, Magick::FloodfillMethod) end |
#color_histogram ⇒ Object
#color_point(x, y, fill) ⇒ Object
Set the color at x,y
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# File 'lib/RMagick.rb', line 714 def color_point(x, y, fill) f = copy f.pixel_color(x, y, fill) return f end |
#color_reset!(fill) ⇒ Object
Set all pixels to the fill color. Very similar to Image#erase! Accepts either String or Pixel arguments
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# File 'lib/RMagick.rb', line 735 def color_reset!(fill) save = background_color # Change the background color _outside_ the begin block # so that if this object is frozen the exeception will be # raised before we have to handle it explicitly. self.background_color = fill begin erase! ensure self.background_color = save end self end |
#colorize ⇒ Object
#colormap ⇒ Object
#compare_channel ⇒ Object
#composite ⇒ Object
#composite! ⇒ Object
#composite_affine ⇒ Object
#composite_channel ⇒ Object
#composite_channel! ⇒ Object
#compress_colormap! ⇒ Object
#contrast ⇒ Object
#contrast_stretch_channel ⇒ Object
#convolve ⇒ Object
#convolve_channel ⇒ Object
#copy ⇒ Object
#crop ⇒ Object
#crop! ⇒ Object
#crop_resized(ncols, nrows, gravity = CenterGravity) ⇒ Object
Force an image to exact dimensions without changing the aspect ratio. Resize and crop if necessary. (Thanks to Jerett Taylor!)
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# File 'lib/RMagick.rb', line 751 def crop_resized(ncols, nrows, gravity=CenterGravity) copy.crop_resized!(ncols, nrows, gravity) end |
#crop_resized!(ncols, nrows, gravity = CenterGravity) ⇒ Object
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# File 'lib/RMagick.rb', line 755 def crop_resized!(ncols, nrows, gravity=CenterGravity) if ncols != columns || nrows != rows scale = [ncols/columns.to_f, nrows/rows.to_f].max resize!(scale*columns+0.5, scale*rows+0.5) end crop!(gravity, ncols, nrows, true) if ncols != columns || nrows != rows self end |
#cur_image ⇒ Object
Used by ImageList methods - see ImageList#cur_image
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# File 'lib/RMagick.rb', line 765 def cur_image self end |
#cycle_colormap ⇒ Object
#delete_profile ⇒ Object
#despeckle ⇒ Object
#difference ⇒ Object
#dispatch ⇒ Object
#displace ⇒ Object
#display ⇒ Object Also known as: __display__
#dissolve ⇒ Object
#distortion_channel ⇒ Object
#dup ⇒ Object
#each_iptc_dataset ⇒ Object
Iterate over IPTC record number:dataset tags, yield for each non-nil dataset
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# File 'lib/RMagick.rb', line 817 def each_iptc_dataset Magick::IPTC.constants.each do |record| rec = Magick::IPTC.const_get(record) rec.constants.each do |dataset| data_field = get_iptc_dataset(rec.const_get(dataset)) yield(dataset, data_field) unless data_field.nil? end end nil end |
#each_profile ⇒ Object
#edge ⇒ Object
#emboss ⇒ Object
#enhance ⇒ Object
#equalize ⇒ Object
#erase! ⇒ Object
#export_pixels ⇒ Object
#export_pixels_to_str ⇒ Object
#find_similar_region ⇒ Object
#flip ⇒ Object
#flip! ⇒ Object
#flop ⇒ Object
#flop! ⇒ Object
#frame ⇒ Object
#gamma_channel ⇒ Object
#gamma_correct ⇒ Object
#gaussian_blur ⇒ Object
#gaussian_blur_channel ⇒ Object
#get_exif_by_entry(*entry) ⇒ Object
Retrieve EXIF data by entry or all. If one or more entry names specified, return the values associated with the entries. If no entries specified, return all entries and values. The return value is an array of [name,value] arrays.
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# File 'lib/RMagick.rb', line 773 def get_exif_by_entry(*entry) ary = Array.new if entry.length == 0 exif_data = self['EXIF:*'] if exif_data exif_data.split("\n").each { |exif| ary.push(exif.split('=')) } end else entry.each do |name| rval = self["EXIF:#{name}"] ary.push([name, rval]) end end return ary end |
#get_exif_by_number(*tag) ⇒ Object
Retrieve EXIF data by tag number or all tag/value pairs. The return value is a hash.
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# File 'lib/RMagick.rb', line 790 def get_exif_by_number(*tag) hash = Hash.new if tag.length == 0 exif_data = self['EXIF:!'] if exif_data exif_data.split("\n").each do |exif| tag, value = exif.split('=') tag = tag[1,4].hex hash[tag] = value end end else tag.each do |num| rval = self["EXIF:#{'#%04X' % num}"] hash[num] = rval == 'unknown' ? nil : rval end end return hash end |
#get_iptc_dataset(ds) ⇒ Object
Retrieve IPTC information by record number:dataset tag constant defined in Magick::IPTC, above.
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# File 'lib/RMagick.rb', line 812 def get_iptc_dataset(ds) self['IPTC:'+ds] end |
#get_pixels ⇒ Object
#gray? ⇒ Boolean
#grayscale_pseudo_class ⇒ Object
#grey? ⇒ Boolean
#implode ⇒ Object
#import_pixels ⇒ Object
#initialize_copy ⇒ Object
#inspect ⇒ Object
#level(black_point = 0.0, white_point = nil, gamma = nil) ⇒ Object
(Thanks to Al Evans for the suggestion.)
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# File 'lib/RMagick.rb', line 841 def level(black_point=0.0, white_point=nil, gamma=nil) black_point = Float(black_point) white_point ||= Magick::MaxRGB - black_point white_point = Float(white_point) gamma_arg = gamma gamma ||= 1.0 gamma = Float(gamma) if gamma.abs > 10.0 || white_point.abs <= 10.0 || white_point.abs < gamma.abs gamma, white_point = white_point, gamma unless gamma_arg white_point = Magick::MaxRGB - black_point end end return level2(black_point, white_point, gamma) end |
#level2 ⇒ Object
#level_channel ⇒ Object
#linear_stretch ⇒ Object
#magnify ⇒ Object
#magnify! ⇒ Object
#map ⇒ Object
#matte_fill_to_border(x, y) ⇒ Object
Make transparent any neighbor pixel that is not the border color.
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# File 'lib/RMagick.rb', line 895 def matte_fill_to_border(x, y) f = copy f.opacity = Magick::OpaqueOpacity unless f.matte f.matte_flood_fill(border_color, TransparentOpacity, x, y, FillToBorderMethod) end |
#matte_flood_fill ⇒ Object
#matte_floodfill(x, y) ⇒ Object
Make transparent any pixel that matches the color of the pixel at (x,y) and is a neighbor.
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# File 'lib/RMagick.rb', line 886 def matte_floodfill(x, y) f = copy f.opacity = OpaqueOpacity unless f.matte target = f.pixel_color(x, y) f.matte_flood_fill(target, TransparentOpacity, x, y, FloodfillMethod) end |
#matte_point(x, y) ⇒ Object
Make the pixel at (x,y) transparent.
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# File 'lib/RMagick.rb', line 866 def matte_point(x, y) f = copy f.opacity = OpaqueOpacity unless f.matte pixel = f.pixel_color(x,y) pixel.opacity = TransparentOpacity f.pixel_color(x, y, pixel) return f end |
#matte_replace(x, y) ⇒ Object
Make transparent all pixels that are the same color as the pixel at (x, y).
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# File 'lib/RMagick.rb', line 877 def matte_replace(x, y) f = copy f.opacity = OpaqueOpacity unless f.matte target = f.pixel_color(x, y) f.transparent(target) end |
#matte_reset! ⇒ Object
Make all pixels transparent.
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# File 'lib/RMagick.rb', line 903 def matte_reset! self.opacity = Magick::TransparentOpacity self end |
#median_filter ⇒ Object
#minify ⇒ Object
#minify! ⇒ Object
#modulate ⇒ Object
#monochrome? ⇒ Boolean
#motion_blur ⇒ Object
#negate ⇒ Object
#negate_channel ⇒ Object
#normalize ⇒ Object
#normalize_channel ⇒ Object
#oil_paint ⇒ Object
#opaque ⇒ Object
#opaque? ⇒ Boolean
#ordered_dither ⇒ Object
#palette? ⇒ Boolean
#pixel_color ⇒ Object
#polaroid ⇒ Object
#posterize ⇒ Object
#preview ⇒ Object
rb_define_method(Class_Image, “plasma”, Image_plasma, 6);
#profile! ⇒ Object
#properties ⇒ Object
#quantize ⇒ Object
#quantum_operator ⇒ Object
#radial_blur ⇒ Object
#radial_blur_channel ⇒ Object
#raise ⇒ Object
#random_channel_threshold ⇒ Object
#random_threshold_channel ⇒ Object
#recolor ⇒ Object
#reduce_noise ⇒ Object
#resample(x_res = 72.0, y_res = nil) ⇒ Object
Corresponds to ImageMagick’s -resample option
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# File 'lib/RMagick.rb', line 909 def resample(x_res=72.0, y_res=nil) y_res ||= x_res width = x_res * columns / x_resolution + 0.5 height = y_res * rows / y_resolution + 0.5 self.x_resolution = x_res self.y_resolution = y_res resize(width, height) end |
#resize ⇒ Object
#resize! ⇒ Object
#resize_to_fit(cols, rows) ⇒ Object
Convenience method to resize retaining the aspect ratio. (Thanks to Robert Manni!)
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# File 'lib/RMagick.rb', line 920 def resize_to_fit(cols, rows) change_geometry(Geometry.new(cols, rows)) do |ncols, nrows| resize(ncols, nrows) end end |
#resize_to_fit!(cols, rows) ⇒ Object
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# File 'lib/RMagick.rb', line 926 def resize_to_fit!(cols, rows) change_geometry(Geometry.new(cols, rows)) do |ncols, nrows| resize!(ncols, nrows) end end |
#roll ⇒ Object
#rotate ⇒ Object
#rotate! ⇒ Object
#sample ⇒ Object
#sample! ⇒ Object
#scale ⇒ Object
#scale! ⇒ Object
#segment ⇒ Object
#sepiatone ⇒ Object
#set_channel_depth ⇒ Object
#shade ⇒ Object
#shadow ⇒ Object
#sharpen ⇒ Object
#sharpen_channel ⇒ Object
#shave ⇒ Object
#shave! ⇒ Object
#shear ⇒ Object
#sigmoidal_contrast_channel ⇒ Object
#signature ⇒ Object
#sketch ⇒ Object
#solarize ⇒ Object
#splice ⇒ Object
#spread ⇒ Object
#statistics ⇒ Object
#stegano ⇒ Object
#stereo ⇒ Object
#store_pixels ⇒ Object
#strip! ⇒ Object
#swirl ⇒ Object
#texture_fill_to_border(x, y, texture) ⇒ Object
Replace neighboring pixels to border color with texture pixels
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# File 'lib/RMagick.rb', line 939 def texture_fill_to_border(x, y, texture) texture_flood_fill(border_color, texture, x, y, FillToBorderMethod) end |
#texture_flood_fill ⇒ Object
#texture_floodfill(x, y, texture) ⇒ Object
Replace matching neighboring pixels with texture pixels
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# File 'lib/RMagick.rb', line 933 def texture_floodfill(x, y, texture) target = pixel_color(x, y) texture_flood_fill(target, texture, x, y, FloodfillMethod) end |
#threshold ⇒ Object
#thumbnail ⇒ Object
#thumbnail! ⇒ Object
#tint ⇒ Object
#to_blob ⇒ Object
#to_color ⇒ Object
#transparent ⇒ Object
#transpose ⇒ Object
#transpose! ⇒ Object
#transverse ⇒ Object
#transverse! ⇒ Object
#trim ⇒ Object
#trim! ⇒ Object
#unique_colors ⇒ Object
#unsharp_mask ⇒ Object
#unsharp_mask_channel ⇒ Object
#view(x, y, width, height) ⇒ Object
Construct a view. If a block is present, yield and pass the view object, otherwise return the view object.
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# File 'lib/RMagick.rb', line 945 def view(x, y, width, height) view = View.new(self, x, y, width, height) if block_given? begin yield(view) ensure view.sync end return nil else return view end end |