My friend zgke provided me with the source code for screenshots and background removal. Do you have any better comments or suggestions for communication?

I want

And remove the red background.

The Code provided by a friend is as follows:

 

Only in one program. CS, note that the file path corresponds to the name (if you want to try Program Correctness)

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. drawing; using system. drawing. imaging; using system. runtime. interopservices; namespace zgkeprogram {class program {static void main (string [] ARGs) {bitmap _ newbitmap = (Bitmap) image. fromfile (@ "C: \ Documents and Settings \ Administrator \ Desktop \ eegtest.bmp"); // create the original image from the specified location // create the image data bitmapdata _ DATA = _ newbitmap. lo Ckbits (New rectangle (0, 0, _ newbitmap. width, _ newbitmap. height), imagelockmode. readonly, _ newbitmap. pixelformat); // create an RGB data stream with the size of _ data. stride row byte [] _ colorbytes = new byte [_ data. stride]; // the starting position of the row 1st is _ data. scan0 graph 1st rows are black. You cannot use 2nd rows _ startptr as the starting position of 2nd rows intptr _ startptr = new intptr (_ data. scan0.toint32 () + _ data. stride); // copy the data to the RGB stream marshal. copy (_ startptr, _ colorbytes, 0, _ data. stride); // release lock _ n Ewbitmap. unlockbits (_ data); int _ startwidth = 0; // start position bool _ startbool = true; // used to determine whether int _ endwidth = 0 is found at the start position; // The Red ending position bool _ endbool = true; // determines whether int _ endindex = _ colorbytes is found at the ending position. length-1; // The index switch (_ newbitmap. pixelformat) {Case pixelformat. format32bppargb: // color depth 32-bit = 4 byte [] for (INT I = 0; I! = _ Newbitmap. width; I ++) {If (_ startbool) {// data stream is B g r ........ B g r A if the color r> = 200 and g B is smaller than 50, it is considered as red if (_ colorbytes [I * 4 + 2]> = 200 & _ colorbytes [I * 4 + 1] <= 50 & _ colorbytes [I * 4] <= 50) {_ startwidth = I; // record start position _ startbool = false; // The next loop is not in the position} If (_ endbool) {// the difference between this and above is that the index at the end position of the forward loop at the end position of B g r a is r-2 is G-3 is B. same as if (_ colorbytes [_ endindex -( I * 4)-1]> = 200 & _ colorbytes [_ endindex-(I * 4) -2] <= 50 & _ colorbytes [_ endindex-(I * 4)-3] <= 50) {_ endwidth = _ newbitmap. width-I; // record end position _ endbool = false ;}} if (! _ Endbool &&! _ Startbool) break;} // create a new image with a red starting position. 0: The Red ending position.-The red starting position. The image has a high bitmap _ savebitmap = _ newbitmap. clone (New rectangle (_ startwidth, 0, _ endwidth-_ startwidth, _ newbitmap. height), _ newbitmap. pixelformat); _ savebitmap. save (@ "C: \ Documents ents and Settings \ Administrator \ Desktop \ 111.bmp"); _ savebitmap. maketransparent (color. red); // remove the red background color. _ Savebitmap. Save (@ "C: \ Documents and Settings \ Administrator \ Desktop \ 123.bmp ");}}}