Comments on: Image File Type Comparison of Exported Charts

By: Compare Excel Worksheets

Compare Excel Worksheets — Fri, 13 Aug 2010 09:08:39 +0000

Thanks for your information on Image file type exported charts comparison.

By: Compare Files

Compare Files — Tue, 11 May 2010 11:15:34 +0000

Nice Explnation on image file type Comparison With Exported Charts

By: Jon Peltier

Jon Peltier — Tue, 14 Apr 2009 00:17:22 +0000

Good detective work. I guess the exports weren’t bad enough, so they messed with the image sizes.

By: Eric

Eric — Mon, 13 Apr 2009 23:02:15 +0000

Jon,
I compared the difference of PNG/GIF files generated by Excel 2003 and 2007 when saving spreadsheet as htm formats.

PNG/GIF files in the files folder from both 2003 and 2007 look very clear.
PNG/GIF files from 2007 are larger in resolutions and the htm codes generated by Excel resize them to fit into the original dimensions as seen in Excel.
This is when the blurriness happens.

It almost feels like someone from MS can change the parameters fairly quick to fix this issue but who knows how long or if this problem will ever be resolved… :(

Thanks a lot for your explanations. And your blog is very informative and helpful!!!

By: Jon Peltier

Jon Peltier — Wed, 08 Apr 2009 00:13:02 +0000

I can think of two reasons for the blurriness.

1. The size that the HTML code uses as the dimensions of the images is not the same as the dimensions of the image files. The pictures are not shown at their true size, and some blurring occurs as they are mushed into the allotted size.

2. IE itself provides additional antialiasing or blurring.

By: Eric

Eric — Tue, 07 Apr 2009 23:13:10 +0000

Jon,
Say… I save an Excel workbook as Report1.htm
Inside the “Report1_files” folder generated by Excel, charts are saved in “PNG” format which are bigger in size than and also almost as clear as original Excel Charts.

I think the problem happens when Excel generates the html text. PNG pictures look fine but for some reason I do not know, pictures look blurry in IE