[reportlab-users] How can I insert CMYK JPG in CMYK pdf document ?

Chuck Martin cwurld at yahoo.com
Mon Jul 27 09:35:32 EDT 2009

I believe that jpg does not support cmyk. When I want CMYK I use tif.

Since there is no perfect mapping from RGB to CMYK, my images start out as eps with CMYK colors. Then I use ghostscript to convert them to tif. If your images start out as RGB bitmaps, then there is less benefit in converting them to tif.


----- Original Message ----
From: KLEIN Stéphane <stephane at harobed.org>
To: reportlab-users at reportlab.com
Sent: Monday, July 27, 2009 8:16:03 AM
Subject: Re: [reportlab-users] How can I insert CMYK JPG in CMYK pdf document ?

Le Mon, 20 Jul 2009 12:33:07 +0000, KLEIN Stéphane a écrit :

> Hi,


> I produce CMYK PDF document and I need to insert CMYK JPG file in my

> document.


> I've one simple example :


> ::


> from reportlab.pdfgen import canvas

> from reportlab.lib.units import cm, mm from reportlab.lib.pagesizes

> import A4 from reportlab.pdfgen.pdfimages import PDFImage


> c = canvas.Canvas( "test.pdf", pagesize = A4) c.drawString(200, 100,

> "hello.pdf")


> img = PDFImage("image_test_cmjn.jpg", 100, 500, 300, 300)

> img.drawInlineImage(c, preserveAspectRatio = True)


> c.showPage()

> c.save()


> "image_test_cmjn.jpg" is a CMYK image. When I look test.pdf, this image

> appear converted in RGB.


> How can I fix this issue ?

I fixed my issue with :

$ convert myfile.jpg -resize 100% myfile.jpg

The "convert" is imagemagick utils.

I don't understand why this fix my issue, maybe error in my jpg...


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