Thanks Shree.
Hello Quan,
Here are my further updates / observations on the post :
- The error which I had mentioned in this post is actually occurring in the
below yellow highlighted line.
- As per my analysis, when a bitmap image is created newly, and if the
image dimensions are exceeding *1900 x 2475*, and in the next line when the
same bitmap is being tried to convert to *Pix *then at that point of time,
I am getting the error which I was talking about in the post.
for (int i = 0; i <= document.Pages.Count; i++)
{
bitmap = (Bitmap)document.SaveAsImage(i,
PdfImageType.Bitmap, 200, 200);
BitmapToPixConverter b = new BitmapToPixConverter();
Pix pix = b.Convert(bitmap);
.........
}
So as per what I understand the Tesseract is not able to convert since the
generated bitmap is of higher dimensions and it is throwing that error what
we are talking about in the post.
Is anyone sure that Tesseract has these kind of limitations while
converting a bitmap of higher dimensions ??
Now, the only way to get rid of this issue is to resize the bitmap image
before I try to convert it to Pix ? Am I in the right direction, any other
ideas please ?
Thanks in Advance,
Hari
On Friday, 9 June 2017 11:59:08 UTC+5:30, shree wrote:
>
> + quan
>
> Quan will be better able to advice regarding .net
>
> also see
> https://sourceforge.net/projects/vietocr/files/vietocr.net/5.0alpha/
>
> ShreeDevi
> ____________________________________________________________
> भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com
>
> On Fri, Jun 9, 2017 at 10:44 AM, Hari.K <[email protected] <javascript:>>
> wrote:
>
>> Thank you Shree for replying back on the issue. Yes I know about
>> ghostscript and its commands, but with the present architecture of project
>> we are restricted to acomodate the ghostscript commands. Besides, I am also
>> aware of "gsdll32.dll", but as it is not a .Net managed library, and we
>> can't reference it directly in a project and moreover we will have to go by
>> the PInvoke procedure, hence for all those above reasons and limitations we
>> are supposed to stay away from ghostscript.
>>
>> Do you think we have any better alternative libraries which I can make
>> use of so that I would not be getting that error which I mentioned in this
>> post ?
>>
>> Thanks in Advance,
>> Hari
>>
>> On Thursday, 8 June 2017 21:16:15 UTC+5:30, shree wrote:
>>>
>>> Have you tried using ghostscript to convert pdf to tif files instead?
>>> Example commands
>>>
>>> gs -r600x600 -sDEVICE=tiffg4 -dFirstPage=106 -dLastPage=109 -o
>>> ./tulasi/tulasikrishna%00d.tif "TulasiPuja.pdf"
>>>
>>> for one tif per page
>>>
>>> gs -r600x600 -sDEVICE=tiffg4 -dFirstPage=126 -dLastPage=131 -o
>>> ./tulasi/tulasIviShNupUjA.tif "TulasiPuja.pdf"
>>>
>>> for multipage tif
>>>
>>> you can reduce resolution to -r300x300
>>>
>>> ShreeDevi
>>> ____________________________________________________________
>>> भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com
>>>
>>> On Thu, Jun 8, 2017 at 7:25 PM, Hari.K <[email protected]> wrote:
>>>
>>>> Hi There,
>>>>
>>>> I sometimes receive an error - "Failed to create pix, this normally
>>>> occurs because the requested image size is too large, please check
>>>> Standard
>>>> Error Output" when doing OCR on a bitmap image.
>>>>
>>>>
>>>> Below highlighted line is where it's breaking for me -
>>>>
>>>> Bitmap bitmap;
>>>> Spire.Pdf.PdfDocument document = new Spire.Pdf.PdfDocument(pdfPath);
>>>>
>>>>
>>>> for (int i = 0; i <= document.Pages.Count; i++)
>>>> {
>>>> bitmap = (Bitmap)document.SaveAsImage(i,
>>>> PdfImageType.Bitmap, 200, 200); // where 200 is the DPI which I am
>>>> setting for a bitmap image
>>>> ...................
>>>> .................
>>>>
>>>> }
>>>>
>>>> More details on what I am trying to do here:
>>>> 1) Uploaded a PDF document which is of hardly 600KB
>>>> 2) Iterate through each PDF page and convert it into a BitMap image
>>>> 3) Then input this BitMap image to Tesseract for performing OCR
>>>>
>>>> Please note, I don't get this error often. Any ideas on why this error
>>>> as I do not receive this every time ?
>>>>
>>>> Looking forward for some inputs on this..
>>>>
>>>> Thanks in Advance,
>>>> Hari
>>>>
>>>>
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