GeoPdf layer image

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   hi,

i m using QUICKPDF Library. but i don't know, how to extract image from the geopdf. image present in the form of layer. plz help me.

Thanks & Regards

vinod pathak

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vinod_pathak Members Profile Find Members Posts Beginner Joined: 14 May 11 Location: india Status: Offline Points: 7	Post Options Post Reply Quote vinod_pathak Report Post Thanks(0) Quote Reply Topic: GeoPdf layer image Posted: 14 May 11 at 9:18AM
	hi, i m using QUICKPDF Library. but i don't know, how to extract image from the geopdf. image present in the form of layer. plz help me. Thanks & Regards vinod pathak

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 14 May 11 at 10:56AM
	Hi Vinod! Please use the search-functionality (above on the right side). Try the advanced option and the searchstring GeoPDF on all forums without time restrictions... Then you'll get what you need ;-) Cheers and welcome here, Ingo Edited by Ingo - 14 May 11 at 10:57AM

vinod_pathak Members Profile Find Members Posts Beginner Joined: 14 May 11 Location: india Status: Offline Points: 7	Post Options Post Reply Quote vinod_pathak Report Post Thanks(0) Quote Reply Posted: 14 May 11 at 12:13PM
	Hi Ingo Thanks for your kind response, but i fetch the layers name but how can i get image from these layers. code: int lay = pdf.OptionalContentGroupCount(); int lay1=0; string lay2 = ""; for (int i = 1; i <= lay; i++) { lay1 = pdf.GetOptionalContentGroupID(i); lay2 = pdf.GetOptionalContentGroupName(lay1); }

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 14 May 11 at 1:45PM
	Hi! Here's a sample how to get images and more out of a pdf: http://www.quickpdf.org/forum/extract-text-and-images-and-insert-into-new-pdf_topic1308.html If you need it relevant for special layers you should try ... but i don't think that this is supported by QP. Cheers, Ingo

vinod_pathak Members Profile Find Members Posts Beginner Joined: 14 May 11 Location: india Status: Offline Points: 7	Post Options Post Reply Quote vinod_pathak Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 4:59AM
	Hi Thanks for your support. May be this PDF Created in PHOTOSHOP. when i open this file in Acrobat. 10 layers are shown in the layers view and image attached as a layer. Thanks & Regards vinod pathak

vinod_pathak Members Profile Find Members Posts Beginner Joined: 14 May 11 Location: india Status: Offline Points: 7	Post Options Post Reply Quote vinod_pathak Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 5:06AM
	Hi Ingo link of pdf is : www.terragotech.com/system/files/geopdf/webmap_urbansample.pdf plz check this pdf Thanks vinod pathak

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 6:48AM
	Hi Vinod! This here is only a user-user-forum ... If you know that the image is on the last layer you can check the layercount using the result to remove the last layer... with the included image. Cheers, Ingo

vinod_pathak Members Profile Find Members Posts Beginner Joined: 14 May 11 Location: india Status: Offline Points: 7	Post Options Post Reply Quote vinod_pathak Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 7:18AM
	Hi! Ingo Thanks for your support. you are doing good task for every one. In this pdf, image add as a layer. QUICKPDF Library not able to extract image from the layer so i will try another tool to extract image from layers in c#. vinod

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 7:20AM
	so you should remove the last layer WITH the image ;-)

vinod_pathak Members Profile Find Members Posts Beginner Joined: 14 May 11 Location: india Status: Offline Points: 7	Post Options Post Reply Quote vinod_pathak Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 7:23AM
	how can i remove last layer that is the image layer.

Rowan Members Profile Find Members Posts Moderator Group Joined: 10 Jan 09 Status: Offline Points: 398	Post Options Post Reply Quote Rowan Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 12:49PM
	Vinod, there might be some confusion here between layers and optional content groups. Read this article: http://help.quickpdflibrary.com/questions/352/what-is-the-difference-between-layers-and-optional-content-groups-ocgs-in-quick In short: Acrobat uses the term layers, but we use the term optional content groups -- in QPL terminology layers refers to content streams. The image that you are referring to is part of an optional content group. Despite the order that it is listed in the Acrobat Layers panel, this does not indicate that internally this image is stored in the last optional content group -- that is just a visual representation, but not an accurate representation of the order in which the OCGs are stored. I will post more info shortly. Just running out of battery on my laptop.

Rowan Members Profile Find Members Posts Moderator Group Joined: 10 Jan 09 Status: Offline Points: 398	Post Options Post Reply Quote Rowan Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 1:47PM
	More info: It is possible to delete optional content groups, but this will not delete the content that was associated with optional content group. Deleting text, image, etc, objects from PDF files is a messy business and so allowing users to delete all content associated with an OCG would result in broken PDF files. What you will need to do is identify the particular image that you want to remove and then use the ClearImage function to basically delete that image. The image object is not actually deleted though, to prevent the corruption of existing links to the image it will not be deleted from the document. The image will be converted into a 24-bit RGB format consisting of a single transparent pixel. I hope this helps.

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 16 May 11 at 1:59PM
	"... The image will be converted into a 24-bit RGB format consisting of a single transparent pixel ..." Tricky and good solution! I've learned something, too ;-) Thanks! Cheers, Ingo