ascii public import bitmap struct Gray = Bitmap, Mode ) -> Bitmap. With the function grayscale-image-to-pgm-file it is possible to write out the gray image as pgm file which can then be further processed. The package identifier assumes that you have the package as defined in Basic bitmap storage#Common Lisp. Use the function rgb-to-gray-image to convert a rgb-image as loaded by the function defined Bitmap/Read a PPM file#Common Lisp. intValue ( nth ( nth matrix row-index ) column-index )))) output-image ) "png" ( new File filename ))) ( println ( write-matrix-to-image ( rgb-to-gray ( ImageIO/read ( new File "test.jpg" ))) "test-gray-cloj.png" )) Common Lisp setRGB output-image column-index row-index (. ( import ' ' ' ' )) ( defn rgb-to-gray ( let ( partition width ( for ( let Compute the grayscale value an return it: L = 0.2126 LMARGIN=oldLMARGIN restore left margin on the screen InitGrayImage(grayimg,width,height,graydata) InitRgbImage(rgbimg,width,height,rgbdata) LMARGIN=0 remove left margin on the screen PROC PrintGrayImage(GrayImage POINTER img)īYTE width=,height=,LMARGIN=$52,oldLMARGIN INCLUDE "H6:RGB2GRAY.ACT" from task Grayscale image V comment = "# generated from Bitmap.writeppmp3\n" fillrect(x, y, width, height, colour = black)Īssert(x >= 0
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