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Please help in converting color image to black and white. Started by hemantbkulkarni at 06-12-2007 2:17. Topic has 1 replies. LEAD Support Fo... » Developer » Color Conversio... » Please help in converting color image to black and white.

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06-12-2007, 2:17 hemantbkulkarni Joined on 11-09-2006 Posts 15 Please help in converting color image to black and white. HI I am using this code below  to convert color image to black and white. RasterProc.ColorRes (LEADRasterView1.Raster, 1, CRP_OPTIMIZEDPALETTE, CRD_FLOYDSTEINDITHERING, 0) I am using code below to save the images. I think there is somethink wrong in this. Will you please enlight me in this regard. ldio.Save LEADRasterView2.Raster, "D:\Images\TEST\BlackandWhiteTest1", FILE_JPEG_411, 0, QFACTOR_ABCQ_LOSSLESS_FAST, 0 These group of  code is not converting color images to black and white images. So I am using the code given below. RasterProc.DynamicBinary( LEADRasterView3.Raster, 32, 32); This converts both Color and Grayscale images to black and white without changing the bits per pixel.But there is one problem with this , here each pixel is compared to a dynamically-calculated threshold. If the intensity of the pixel is higher  than the dynamic threshold, the pixel will be set to white. If the intensity of the pixel is lower than the dynamic threshold, the pixel will be set to black because of this , images are losing the information. ie lightly drawn lines are not seen as pixels become white there. So is there any method to set this threshold intensity to some desired value. my questions are 1. why above code is not converting the color images to black and white ? I am attaching the image converted using your code. 2. How control this threshold intensity factor? 3. Is there any other better way to convert the images to black and white without losing the information from images.     Thanks in advance.  With Regards  Hemant BK    Report

06-13-2007, 11:03 Qasem Lubani Joined on 08-13-2006 Posts 1,044 Re: Please help in converting color image to black and white. If you need to convert a color image to black and white, there are different ways of getting there, but the best one depends on the image contents, and the desired result. Please attach one or more color images, and describe how you want them to become. Important notes: 1. The system does not allow all types of attachments, so make sure to put all files into one ZIP or RAR file before attaching. 2. Please specify which LEADTOOLS version you're using (13, 14, etc.) Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

LEAD Support Fo... » Developer » Color Conversio... » Please help in converting color image to black and white.

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