These are usually because libpng/libtiff Eric are not present, did you confirm 
the leptonica installed those dependencies?

Sent from my iPhone

> On 21 Jan 2015, at 05:56, Purohith Nayak <[email protected]> wrote:
> 
> Hi, 
>     I installed leptonica then tesseract and everything went well, But when i 
> try to pass a .png file it gives 
>         Error in pixReadStreamPng: function not present
>         Error in pixReadStream: png: no pix returned
>         Error in pixRead: pix not read
>         Unsupported image type
> 
>> On Saturday, September 22, 2012 at 12:57:17 PM UTC+5:30, zdenop wrote:
>> Hi,
>> 
>> first of all: there is leptonica 1.69 and tesseract-ocr 3.02 in in Ubuntu 
>> 12.4 LTS Precise Pangolin. So maybe you can rebuild packages from there. 
>> 
>> Next:
>> Did you try to run "sudo ldconfig" [1] after installing leptonica?
>> If it does not work, than try to set LIBLEPT_HEADERSDIR (see ./configure 
>> --help) e.g. LIBLEPT_HEADERSDIR=/usr/local/include/leptonica ./configure
>> 
>> If it does not help, send config.log (from tesseract-ocr)
>> 
>> [1] http://code.google.com/p/tesseract-ocr/wiki/ReadMe#Linux
>> 
>> -- 
>> Zdenko
>>> On Fri, Sep 21, 2012 at 11:08 PM, Osman Masood <[email protected]> wrote:
>>> Hello everyone,
>>> I'm trying to install leptonica 1.69 and Tesseract v3.01 using the exact 
>>> instructions found in their respective README files. Leptonica installs 
>>> without a problem; however, whenever I try to run ./configure (even after 
>>> running ./autogen.sh) it says: configure: error: leptonica library missing. 
>>> These are the commands I'm using to install each, which are exactly in 
>>> accordance with the README/INSTALL files:
>>> 
>>> For leptonica 1.69:
>>> ./configure
>>> make
>>> sudo make install
>>> 
>>> For Tesseract 3.01:
>>> ./autogen.sh
>>> ./configure
>>>  > configure: error: leptonica library missing.
>>> 
>>> I'm really confused, can one of you gurus help me out?
>>> Much thanks!
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