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Re: BW conversion with invert check Started by kenk@iatricsys.com at 11-23-2007 11:32. Topic has 5 replies. LEAD Support Fo... » Developer » Color Conversio... » Re: BW conversion with invert check

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11-23-2007, 11:32 kenk@iatricsys.com Joined on 06-17-2003 Posts 3 BW conversion with invert check Hi, I am using Lead Tools Raster Pro V13. I am converting non Black/White images to Black/White. I then check if the image is inverted and correct it if so. The problem I have is the resulting image,inverted or not, is "blocky" or "pixelated". If I save it to file and then load it again, it looks great! How can I get the same results without saving to file and reloading? Thanks. Best regards, Ken Here is the code I use. 'Convert to BW ctlLeadViewer.Grayscale 8 ctlLeadViewer.ColorRes 1, CRP_FIXEDPALETTE, CRD_NODITHERING, 0 LeadOLEColor = ctlLeadViewer.BitmapPalette(0) If LeadOLEColor <> 0 Then    'image inverted-swap palatte values    ctlLeadViewer.BitmapPalette(1) = ctlLeadViewer.BitmapPalette(0)    ctlLeadViewer.BitmapPalette(0) = 0 End If ctlLeadViewer.PaintScaling = PAINTSCALING_RESAMPLE 'Save to file     ctlLeadViewer.GetFileInfo pstrTempFile, pPage + 1, 0 'FILEINFO_TOTALPAGES     ctlLeadViewer.SaveIFD = ctlLeadViewer.InfoIFD     ctlLeadViewer.SavePage = 1     ctlLeadViewer.Save pstrFileName, FILE_CCITT_GROUP4, ctlLeadViewer.BitmapBits, pintCompression, Save_Overwrite ctlLeadViewer.SaveIFD = 0 Reload it     ctlLeadSource.GetFileInfo pstrFileName, pPage + 1, 0     ctlLeadSource.LoadIFD = ctlLeadSource.InfoIFD     ctlLeadSource.Load pstrFileName, 0, pPage + 1, 1     ctlLeadSource.LoadIFD = 0     ctlLeadViewer.Bitmap = ctlLeadSource.Bitmap The image looks great after reloading.      Report

11-25-2007, 5:00 Maen Hasan Joined on 08-05-2004 Posts 1,795 Re: BW conversion with invert check Hello, What is the build number (file version) of the LEADTOOLS v13 DLLs that you use? Can you please send me snapshot images that show the problem in the result image and how exactly do you expect it to appear? Note: please put the images in a ZIP or RAR file and post it here. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

11-26-2007, 20:50 kenk@iatricsys.com Joined on 06-17-2003 Posts 3 BW conversion with invert check Attachment: Images.zip Hi, I am using Lead Tools V13.0.0.53 I have attached a zip file that contains the original bmp (Original.bmp). It is a 24bit True color image.Also I added a screen scrape(Converted1bit.bmp), that represents the results I get after using Lead.Grayscale and Lead.ColorRes. If I simply reload the file after the conversion, as in my code above, the pixelization is gone and the image looks like the original....only it is now a 1 bit image, which is what I want. Best regards, Ken Moderator: Please move this to the other post with the same name. I tried to reply to the other thread but it placed it here.    Report

11-27-2007, 4:21 Maen Hasan Joined on 08-05-2004 Posts 1,795 Re: BW conversion with invert check Hello, To improve the display quality of image, after changing the image to 1-bit, try to BitonalScaling property to BITONALSCALING_SCALETOGRAY and repaint the image. +----+ ctlLeadViewer.ColorRes 1, CRP_FIXEDPALETTE, CRD_NODITHERING, 0 ctlLeadViewer.BitonalScaling = BITONALSCALING_SCALETOGRAY ctlLeadViewer.ForceRepaint +----+ Please let me know if this helps. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

11-28-2007, 21:50 kenk@iatricsys.com Joined on 06-17-2003 Posts 3 Re: BW conversion with invert check Hi Maen, Sorry to say but that didn't have an effect. I would guess the conversion samples the pixels color and determines whether to convert it to Black or White and then applies the dither method. I know I can choose different dither methods, but is there a way to adjust the threshhold used when converting to 1 bit? Thanks. Best regards, Ken    Report

11-29-2007, 4:43 Maen Hasan Joined on 08-05-2004 Posts 1,795 Re: BW conversion with invert check Hello, I checked your code with the BITONALSCALING_SCALETOGRAY option using LEADTOOLS v14.5 and the problem is not active. The image displays correctly using LEADTOOLS v14.5. LEADTOOLS v13 is out of production and we no longer update or fix problems in this version. If you would like, you can check the same issue using the evaluation version of LEADTOOLS v14.5 SDK. You can download the evaluation version directly by using the following URL: http://www.leadtools.com/evaldownloads/v14/eval/LEADTOOLSEVAL.exe Thanks, Maen Badwan LEADTOOLS Technical Support    Report

LEAD Support Fo... » Developer » Color Conversio... » Re: BW conversion with invert check

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