PNG数据块到image dimensions

robin

I am trying to get RM to determine the size of images it is looking at when applying machine learning. All of the images we deal with are PNG and the PNG specifications are located here:https://www.w3.org/TR/PNG/#4Concepts.PNGImage

Looking at the ASCI character for the RapidMiner logo located atrapidminer-logo-retina.pngthe first 24 ASCII characters are

âPNG IHDRôí

The image size is contained in the first chunk after IHDR

I use this process to extract the ASCII characters for the image size:

   
      https://1xltkxylmzx3z8gd647akcdvov-wpengine.netdna-ssl.com/wp-content/uploads/2016/06/rapidminer-logo-retina.png"/>                        

上述过程的结果

ôí

How would you recommend converting this into image height and width?

MartinLiebig

Hi@robin,

honestly - i would use groovy here.. It's so straight forward. See attached example.

BR,

Martin

yyhuang

Hi@robin,

Thanks for sharing the use case with the community. I suggest you use the IMMI image mining extension.
To install IMMI, first download from herehttp://www.burgsys.com/image-analysis-software.php

Here is my result for extracting metadata about image info using IMMI 7.0 under RapidMiner 9.2

   
             https://1xltkxylmzx3z8gd647akcdvov-wpengine.netdna-ssl.com/wp-content/uploads/2016/06/rapidminer-logo-retina.png"/>                                                             

YY

yyhuang

Bravo Dr@mschmitz, how neat and smart your solution is!

robin

Thank you@mschmitz! That is a perfect and simple solution.