Sofar I received 2 reactions.
(1)
Can't reproduce here; I get a 70KB pdf with your file and image.
ConTeXt standalone, 32-bit Linux, mkiv, version 2011.10.01 10:48.
(2)
I've encountered the same problem. The PDF is 1.8MB big. Compressed with qpdf
(qpdf --stream-data=compress) its only 60KB!
Latest beta on OS-X 10.7.2
Further search for the cause:
My system is also OS-X 10.7.2 and latest beta.
To find the culprit I reverted to an older version of ConTeXt.
ConTeXt ver: 2011.10.14 22:47 MKIV fmt: 2011.11.11 int: english/english
Now the filesize becomes 72KB instead of 1.8 MB.
This one seems OK.
CONCLUSION: This must have been introduced in one of the beta's later than
2011.10.14 and in or before the current one: ConTeXt ver: 2011.11.04 14:15
MKIV.
I kindly suggest Hans takes a look into the matter.
Hans van der Meer
On 10 nov. 2011, at 21:22, Hans van der Meer wrote:
> Something terrible must be done to png pictures, either in ConTeXt or in
> luatex.
> I have the following minimal sample code and picture. I include the png for
> those who want to check.
>
> % Test png addition.
> \starttext
> Place png figure.\par
> \placefigure{Test figure}{\externalfigure[test.png]}
> \stoptext
>
> Without the png-picture it makes an 8KB pdf.
> But with the png-picture the pdf swells to 1.8MB.
> And that for a png-picture of only 48KB.
> Moreover making a zip of all this stuff brought the size back to 110KB.
> In the log:
> ConTeXt ver: 2011.11.04 14:15 MKIV fmt: 2011.11.10 int: english/english
> mkiv lua stats > graphics processing time - 0.001 seconds including tex, 1
> processed images
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