> Jeg har brug for at kunne lave thumbnails i jpeg-format af diverse andre
> billedformater (jpeg, bmp, gif, png, ico mm.). Disse thumbnails skal jeg
> bruge til at kunne vise indholdet af en folder i en billedbrowser, jeg er
> ved at programmere.
Jeg synes at Irfanview (
www.irfanview.com) er ganske hurtig og den kan man
programmere med command line options. Afsnittet nederst i dette indlæg er
taget direkte fra hjælpen i Irfanview og som det ser ud kan du have glæde af
resize funktionen, men jeg har nu ikke kigget nærmere på det.
Lars Thomsen Nielsen
*****************
Command line options allow you to set some functions of IrfanView before the
viewer is launched.
These command line options are supported in IrfanView:
/one - force 'Only one instance'
/fs - force Full Screen display
/bf - force 'Fit image to desktop' display option
/title=text - set window title to 'text'
/pos=(x,y) - move the window to x,y
/convert=filename - convert input file to 'filename' and close
IrfanView
/slideshow=txtfile - play slideshow with the files from 'txtfile'
/slideshow=folder - play slideshow with the files from 'folder'
/thumbs=folder - force thumbnails (with a specific folder)
/killmesoftly - close all IrfanView instances
/closeslideshow - close slideshow and close IrfanView after the last
image
/page=X - open page number X from a multipage input image
/crop=(x,y,w,h) - crop input image: x-start, y-start, width, height
/print - print input image (all pages) to default printer and close
IrfanView
/print="Name" - print input image (all pages) to specific printer and
close IrfanView
/resize=(w,h) - resize input image to w (width) and h (height)
/resample=(w,h) - resample input image to w (width) and h (height)
/capture=X - capture the screen or window (see examples below)
/ini - use the Windows folder for INI/LST files (read/save)
/ini="Folder" - use the folder "Folder" for INI/LST files (read/save)
/clippaste - paste image from the clipboard
/clipcopy - copy image to the clipboard
/silent - don't show error messages for command line read/save errors
/invert - invert the input image
/dpi=(x,y) - change DPI values
/scan - acquire the image from the TWAIN device (show TWAIN dialog)
/scanhidden - acquire the image from the TWAIN device (hide TWAIN
dialog)
/batchscan=(options) - simulate menu: File->Batch Scan, see below for
example
/bpp=BitsPerPixel - change color depth of the input image to
BitsPerPixel
/swap_bw - swap black and white color
/gray - convert input image to grayscale
/rotate_r - rotate input image to right
/rotate_l - rotate input image to left
/filepattern="x" - browse only specific files
/sharpen=X - open image and apply the sharpen filter value X
/contrast=X - open image and apply the contrast value X
/hide=X - hide toolbar, status bar, menu and/or caption of the main
window (see examples below)
/aspectratio - used for /resize and /resample, keep image proportions
/info=txtfile - write image infos to "txtfile"
/append=tiffile - append image as (TIF) page to "tiffile"
/multitif=(tif,files) - create multipage TIF from input files
/jpgq=X - set JPG save quality
/tifc=X - set TIF save compression
/wall=X - set image as wallpaper
/extract=(file,ext) - extract all pages from a multipage file
/import_pal=palfile - import and apply a special palette to the image
(PAL format)
Notes:
- Only lower case options are supported (don't type any UPPERCASE letters) !
- Input file name (if required) is always the first paramater!
- Use "" for file names with spaces, example: "dummy test file.jpg"
- Write always the FULL paths for file names (incl. drive)
- You can combine several options in one command
- Wildcards (*) supported only for /convert, /print and /info
- Maximal command line length is limited by Windows
Example for conversion:
i_view32.exe c:\test.bmp /convert=c:\test.jpg
Convert file: 'c:\test.bmp' to 'c:\test.jpg' without GUI.
i_view32.exe c:\*.jpg /convert=d:\temp\*.gif
i_view32.exe c:\*.jpg /resample=(500,300) /convert=d:\temp\*.png
i_view32.exe c:\*.jpg /resample=(500,300) /aspectratio
/convert=d:\temp\*.png
Example for slideshow:
i_view32.exe /slideshow=c:\mypics.txt
(Note: The file 'c:\mypics.txt' contains, in each line, a name of the
image, including the full path OR
path relative to "i_view32.exe")
i_view32.exe /slideshow=c:\images\
i_view32.exe /slideshow=c:\images\*.jpg
i_view32.exe /slideshow=c:\images\test*.jpg
Example for /closeslideshow:
i_view32.exe /slideshow=c:\mypics.txt /closeslideshow
The file 'c:\mypics.txt' contains, in each line, a name of the image,
including the full path. Close IrfanView after the last image from the TXT
file.
Example for thumbnails:
i_view32.exe c:\test\image1.jpg /thumbs
Open 'image1.jpg' and display thumbnails from directory 'c:\test'.
i_view32.exe c:\test\ /thumbs
Display thumbnails from directory 'c:\test'.
Example for close:
i_view32.exe /killmesoftly
Close IrfanView and terminate all instances.
Example for /page:
i_view32.exe c:\test.tif /page=3
Open page number 3 from the multipage image 'c:\test.tif'.
Example for /crop:
i_view32.exe c:\test.jpg /crop=(10,10,300,300)
Open 'c:\test.jpg' and crop: x-start=10, y-start=10, width=300, height=300
(in pixels).
Example for /print:
i_view32.exe c:\test.jpg /print
Open 'c:\test.jpg', print the image to default printer and close IrfanView.
i_view32.exe c:\test.jpg /print="Printer Name"
Open 'c:\test.jpg', print the image to specific printer and close IrfanView.
i_view32.exe c:\*.jpg /print
Print all JPGs from "C:\" and close IrfanView.
Example for /resize:
i_view32.exe c:\test.jpg /resize=(300,300)
Open 'c:\test.jpg' and resize: width=300, height=300.
i_view32.exe c:\test.jpg /resize=(300,300) /aspectratio
Open 'c:\test.jpg' and resize: width= max. 300, height= max. 300,
proportional.
i_view32.exe c:\test.jpg /resize=(300,0)
Open 'c:\test.jpg' and resize: width=300, height=original.
i_view32.exe c:\test.jpg /resize=(300,0) /aspectratio
Open 'c:\test.jpg' and resize: width=300, height=proportional.
i_view32.exe c:\test.jpg /resize=(150p,150p)
Open 'c:\test.jpg' and resize: width=150%, height=150%.
Example for /resample:
i_view32.exe c:\test.jpg /resample=(300,300)
Open 'c:\test.jpg' and resample: width=300, height=300 (using the active
resample filter from the I_VIEW32.INI).
i_view32.exe c:\test.jpg /resample=(300,300) /aspectratio
Open 'c:\test.jpg' and resample: width= max. 300, height= max. 300,
proportional.
i_view32.exe c:\test.jpg /resample=(0,300)
Open 'c:\test.jpg' and resample: width=original, height=300 (using the
active resample filter from the I_VIEW32.INI).
i_view32.exe c:\test.jpg /resample=(0,300) /aspectratio
Open 'c:\test.jpg' and resample: width=proportional, height=300 (using the
active resample filter from the I_VIEW32.INI).
i_view32.exe c:\test.jpg /resample=(50p,70p)
Open 'c:\test.jpg' and resample: width=50%, height=70% (using the active
resample filter from the I_VIEW32.INI).
Example for /capture:
i_view32.exe /capture=0
Capture the whole screen.
i_view32.exe /capture=1
Capture the foreground window.
i_view32.exe /capture=2
Capture client area of the foreground window.
Example for /ini:
i_view32.exe /ini
i_view32.exe c:\test.jpg /ini
i_view32.exe c:\test.jpg /ini="c:\temp\"
Example for /clippaste:
i_view32.exe /clippaste
i_view32.exe /clippaste /convert=c:\test.gif
Example for /clipcopy:
i_view32.exe c:\test.jpg /clipcopy
i_view32.exe c:\test.jpg /clipcopy /killmesoftly
Example for /invert:
i_view32.exe c:\test.jpg /invert
Example for /dpi:
i_view32.exe c:\test.jpg /dpi=(72,72)
Example for /scan:
i_view32.exe /scan
i_view32.exe /scan /convert=c:\test.gif
Example for /batchscan=(options):
options = all 8 options from the batch scan dialog:
filename, index, increment, digits, skip, dest-folder, save-extension,
multi-tif
i_view32.exe /batchscan=(scanfile,1,1,2,1,c:\temp,bmp,0)
i_view32.exe /batchscan=(scanfile,1,1,2,0,c:\temp,tif,1)
Example for /bpp:
i_view32.exe c:\test.jpg /bpp=8
Open 'c:\test.jpg' and reduce to 256 colors. Supported BPP-values: 1, 4, 8
and 24 (decrease/increase color depth).
Example for /sharpen:
i_view32.exe c:\test.jpg /sharpen=33
Example for /filepattern:
i_view32.exe c:\images\ /thumbs /filepattern="*.jpg"
Go to folder "'c:\images" and show JPG thumbnails only.
i_view32.exe c:\images\ /thumbs /filepattern="123*.jpg"
Go to folder "'c:\images" and show JPG names "123*" as thumbnails.
Example for /hide:
Values (can be combined (add values)):
Toolbar 1
Status bar 2
Menu bar 4
Caption 8
i_view32.exe c:\test.jpg /hide=1
Open 'c:\test.jpg', hide toolbar only
i_view32.exe c:\test.jpg /hide=3
Open 'c:\test.jpg', hide toolbar and status bar
i_view32.exe c:\test.jpg /hide=12
Open 'c:\test.jpg', hide caption and menu bar
i_view32.exe c:\test.jpg /hide=15
Open 'c:\test.jpg', hide all
Example for /info:
i_view32.exe c:\test.jpg /info=c:\test.txt
i_view32.exe c:\*.jpg /info=c:\jpgs.txt
Example for /append:
i_view32.exe c:\test.jpg /append=c:\test.tif
Open 'c:\test.jpg' and append it as page to 'c:\test.tif'
Example for /multitif:
Syntax: /multitif=(tifname,file1,...,fileN)
First file is the name of the result TIF file.
i_view32.exe /multitif=(c:\test.tif,c:\test1.bmp,c:\dummy.jpg)
Create multipage TIF ('c:\test.tif') from 2 other images.
Example for /jpgq:
i_view32.exe c:\test.jpg /jpgq=75 /convert=c:\new.jpg
Open 'c:\test.jpg' and save it as 'c:\new.jpg', quality = 75. Quality range:
1 - 100.
Example for /tifc:
i_view32.exe c:\test.jpg /tifc=4 /convert=c:\new.tif
Open 'c:\test.jpg' and save it as 'c:\new.tif', compression = Fax4
Compressions: 0 - None, 1 - LZW, 2 - Packbits, 3 - Fax3, 4 - Fax4, 5 =
Huffman, 6 - JPG, 7 - ZIP.
Example for wallpaper:
i_view32.exe c:\test.jpg /wall=0
Open 'c:\test.jpg' and set is as wallpaper (centered)
i_view32.exe c:\test.jpg /wall=1
Open 'c:\test.jpg' and set is as wallpaper (tiled)
i_view32.exe c:\test.jpg /wall=2
Open 'c:\test.jpg' and set is as wallpaper (stretched)
Example for /extract:
i_view32.exe c:\multipage.tif /extract=(c:\temp,jpg)
Open 'c:\multipage.tif' and save all pages to folder 'c:\temp' as single
JPGs.