Help with CANVAS and RESIZE

[kobber]

Hello.
I want to process a pack of images with different scales - need to crop and resize to 4:3 scale.
For example, on screenshot: red rectangles - source images, green - desired results.

222.jpg

Initialy I used this command:

nconvert -ratio -resize 0 2000 -canvas 1500 2000 center -i -o dest.jpg source.jpg

It was good for one type of images, but for second - it leaves black lines on a sides of image.

Is there solution to use one line command to deal with both types of scales?
May be canvas longest, resize longest
Have no ideas...

[cday]

When resizing an image to a particular ratio requires new canvas to be added, the colour of the canvas added is set by the -background option:

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 -bgcolor red green blue: Background color (for rotate/canvas)
 -bgcolor2 red green blue alpha: Background color (for rotate/canvas)

When no colour is specified the default value may well be black.

I'm not sure looking quickly whether that is your problem, but you might take a look at that...

[bll06]

Hello,

The -bgcolor and -bgcolor2 doesn't work when i use -keepcspace option. My original picture have a 32bit color depth.

For example :
nconvert -q 85 -ratio -rtype lanczos -rflag orient -keepcspace -resize longest 1000 -bgcolor 255 255 255 -canvas 1000 1000 center -out jpeg -o "C:\TEMP\photo1.JPG" "C:\MEDIATHEQUE\photo.EPS"

The added background get a random color.

Any ideas?
Thanks

[cday]

You want to keep 32-bit depth, or output a 24-bit image with a selected background color? In the latter case, you could test including a term to set the bit depth to 24-bit.

[bll06]

You want to keep 32-bit depth, or output a 24-bit image with a selected background color? In the latter case, you could test including a term to set the bit depth to 24-bit.

I need to keep 32-bits depth.

[cday]

I need to keep 32-bits depth.

You might look at this recent thread for ideas if you haven't already done so.

I don't have much experience with 32-bit, but when I had a quick look at the poster's problem using XnConvert, I also obtained an output file with a green background.

Otherwise you will have to wait for Pierre the developer of NConvert.

[xnview]

and if you use

Code: Select all

nconvert -q 85 -ratio -rtype lanczos -rflag orient -resize longest 1000 -bgcolor 255 255 255 -canvas 1000 1000 center -out jpeg -o "C:\TEMP\photo1.JPG" "C:\MEDIATHEQUE\photo.EPS"

why do you want -bgcolor?

[bll06]

and if you use

Code: Select all

nconvert -q 85 -ratio -rtype lanczos -rflag orient -resize longest 1000 -bgcolor 255 255 255 -canvas 1000 1000 center -out jpeg -o "C:\TEMP\photo1.JPG" "C:\MEDIATHEQUE\photo.EPS"

why do you want -bgcolor?

With -keepcspace option i got black (or random color) stripes

[xnview]

could you send me the original file?

[bll06]

could you send me the original file?

The original file

[xnview]

ok, the original image is in CMYK, you would like to keep it in CMYK?

[bll06]

ok, the original image is in CMYK, you would like to keep it in CMYK?

Yes, I need to keep the originals colors

[xnview]

ok, i'll fix it....

[RENEDANSET]

j'ai le même problème,
nconvert -ratio -rtype lanczos -rflag orient -resize 600 600 -canvas 600 600 center -bgcolor 255 255 255 "C:/PHOTOS/AL23512-PD01.jpg"
le fond est noir

[xnview]

j'ai le même problème,
nconvert -ratio -rtype lanczos -rflag orient -resize 600 600 -canvas 600 600 center -bgcolor 255 255 255 "C:/PHOTOS/AL23512-PD01.jpg"
le fond est noir

il me faudrait votre image