![]() ![]() ![]() Get data, reduce to bit rate, shift it and store it.ĭataXbit |= (Byte)((data8bit & bitmask) << shift) Amount of bits to shift the data to get to the current pixel data Int32 indexXbit = y * stride + x / parts This will hit the same byte multiple times Should not be needed if data is correct, but eh.īyte dataXbit = new Byte Bit mask for reducing original data to actual bits maximum. Throw new ArgumentException("Data given data is too small to contain an 8-bit image of the given dimensions", "data8bit") Throw new ArgumentException("Stride is too small for the given width!", "stride") Throw new ArgumentException("Cannot convert to bit format greater than 8!", "newBpp") Private static Byte ConvertFrom8Bit(Byte data8bit, Int32 width, Int32 height, Int32 bitsLength, Boolean bigEndian) / The image data converted to the requested amount of bits per pixel. / Values inside a single byte are read from the largest to the smallest bit. Will be adjusted to the new stride value. / Stride used in the original image data. / Converts given raw image data for a paletted 8-bit image to lower amount of bits per pixel. Note that this function only allocates the minimum needed amount of bytes for the stride. The "stride" is what you got as scanlineSize in your code. Then, to convert it to an array of 1-bit data, you can use this function. If your source is a grayscale image, you could just cap it off at 127, and make all > 127 values '1' and all imagedata.Length i++) I want to do it without converting byte array to bitmap object.įirst of all, if you go for 1 bit per pixel, note that you get an image with pure black and white pixels. How can i get 8 bit array to 1 bit array image? Output.SetField(TiffTag.YRESOLUTION, yres) Output.SetField(TiffTag.XRESOLUTION, xres) Output.SetField(TiffTag.BITSPERSAMPLE, 1) Output.SetField(TiffTag.SAMPLESPERPIXEL, 1) Output.SetField(TiffTag.PHOTOMETRIC, Photometric.MINISBLACK) Output.SetField(TiffTag.COMPRESSION, Compression.CCITTFAX4) Output.SetField(TiffTag.IMAGELENGTH, height) Output.SetField(TiffTag.IMAGEWIDTH, width) Int photo = input.GetField(TiffTag.PHOTOMETRIC).ToInt() Int bitsPerSample = input.GetField(TiffTag.BITSPERSAMPLE).ToInt() Int samplesPerPixel = input.GetField(TiffTag.SAMPLESPERPIXEL).ToInt() Int yres = input.GetField(TiffTag.YRESOLUTION).ToInt() Int xres = input.GetField(TiffTag.XRESOLUTION).ToInt() Int height = input.GetField(TiffTag.IMAGELENGTH).ToInt() Int width = input.GetField(TiffTag.IMAGEWIDTH).ToInt() If (input.GetField(TiffTag.COMPRESSION).ToInt() = (int)Compression.LZW) Using (Tiff output = Tiff.Open(fileOut, "w"))įor (short page = 0 page < input.NumberOfDirectories() page++) I want to convert it using : using (Tiff input = Tiff.Open(fileIn, "r")) I have 8 bit per sample image grayscale. pixelate() draws a pixelated version of the from image to the to canvas,, apply only after. resizeImage() resizes the output image if bigger than the defined max Height or max Width convertpalette() converts image with the defined color palette, apply only after. convertGrayscale() converts image to greyscale, apply only after. getpalette() returns array of current palette, can't be chained setMaxHeight(int) set canvas image maximum height, it can resize the output image, max height overrides max width, only used when. ![]() setMaxWidth(int) set canvas image maximum width, it can resize the output image, only used when. setpalette(arr) sets the color palette to use, takes an array of rgb colors: ], int from 0 to 255 setFromImgSource(src) change the src from the image element setDrawTo(elem) canvas elem to draw the image setDrawFrom(elem) elem to get the image to pixelate hideFromImg() hides the from image element, is applied on object creation draw() draw to canvas from image source and resizes if max height or max width is reached You can chain all methods together, beware that the order they are applied can change the final result.Īpplying first the color palette and then the greyscale can give a slightlity different image. To : elem, defaults to document.getElementById("pixelitcanvas")įrom : elem, defaults to document.getElementById("pixelitimg") You can pass some options when creating the instance (you can alter them later using the api methods). Then load the pixelit.js script and apply it on an image. To use the quick default configuration you need an element from where to draw the image and canvas element with the id pixelitcanvas. ![]()
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