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Is it poosible to make OpenCV read multiple page tiff

asked 2016-03-16 11:15:42 -0500

essamzaky gravatar image

OpenCV reads only the first page

Is it poosible to make OpenCV read multiple page tiff ?

if OpenCV can not read , what is the exteranl libray can extract the tiff pages and how to pass the data again to OpenCV

any help is appriciated

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answered 2016-03-17 06:03:05 -0500

kbarni gravatar image

The best way to read TIFF files is using the libtiff library.

It supports every feature of the TIFF file format (multi-page, multi-channel, etc.) Other libraries implement only a part of the standard (generally grayscale or rgb 8-bit images). Libtiff is also cross-platform.

I already wrote an answer about using libtiff in OpenCV for multispectral images. Check the library documentation how to modify the code for multipage images.

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Thankx @kbrani , it seems libtiff is the best option but it needs a lot of work to do , if you have already wtitten function to read multiple tiff it will be appriciated , currently i found library called liptonica, it's already using tibtiff too , alot of posts says it's very stable and good handling for tiff files , it will minimize the process of handling tiff from scratch , i'm trying to build the 1.73 leptonica library on VS2010 not succeded till now..

essamzaky gravatar imageessamzaky ( 2016-03-17 09:36:27 -0500 )edit
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answered 2016-03-18 08:20:27 -0500

mshabunin gravatar image

Try cv::imreadmulti from OpenCV 3.1: documentation

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good to know that OpenCV going to handle multiple tiff , but I still did understand imreadmulti documentation , if I have an image with unknown number of pages , who will direct me to use imread or imreadmulti , another issue imreadmulti read all pages in memory (verctor of MAT) , I have some books may reach to 1000 pages , loading all pages will consume most of device memory , I think it's better to be implemented as follow

1-Function to get number of pages .
2-If number of pages is one we can call imread 
3-If Number of pages larger than 1 we can call imreadmulti
4-Do not load all pages in memory , just open the required index.
5-If the user need all pages , he will use the pages counter obtained from point 1 and loop all pages.
essamzaky gravatar imageessamzaky ( 2016-03-18 14:06:38 -0500 )edit

@essamzaky you can open an issue here as new feature request. if you can change and compile OpenCV source. it is not too hard to implement your imreadmulti function. take a look the source

sturkmen gravatar imagesturkmen ( 2016-05-22 16:00:03 -0500 )edit

thanks @sturkmen , i had open an issue imreadmulti issue currently i'm very busy , when i have time i will try to implement multiple page according what i saw in other commertioal libraries

essamzaky gravatar imageessamzaky ( 2016-05-23 04:36:26 -0500 )edit
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answered 2016-03-16 13:33:14 -0500

Guyygarty gravatar image

Re external libraries, that would depend on your OS and compiler. Using Microsoft Visual C++ you can use a TiffBitmapDecoder object. The code below may be overly complicated but it should work.

Stream^ imageStreamSource = gcnew FileStream(FileName, FileMode::Open, FileAccess::Read, FileShare::Read);
TiffBitmapDecoder^ decoder = gcnew TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions::PreservePixelFormat, BitmapCacheOption::Default);
BitmapSource^ bitmapSource = decoder->Frames[FrameNumber];
int width=bitmapSource->PixelWidth;
int height=bitmapSource->PixelHeight;
int bitsPerPixel=bitmapSource->Format.BitsPerPixel; 
Type=;//you'll need to figure this one out
int stride = (width * bitsPerPixel + 7) / 8;//this may need to change for color images
array<System::Byte>^ pixels = gcnew array<System::Byte>(height * stride);
bitmapSource->CopyPixels(pixels,stride,0);
Mat Img=Mat(Height,Width,Type,&pixels[0],Stride);

guy

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Thanks @Guyygarty , it seems that TiffBitmapDecoder is part of .Net Framework , actually I'm using native c++ dll for windows, I do not use .Net framework , I'm developing the dll using MS visual studio , so is there any other library works for windows c++ .

essamzaky gravatar imageessamzaky ( 2016-03-16 16:36:04 -0500 )edit
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Asked: 2016-03-16 11:15:42 -0500

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Last updated: Mar 18 '16