Output Grayscale Image through VGA in DE1

Altera_Forum · ‎05-10-2016

I am trying to make a project wherein I will capture an image thru DE1 D5M camera module and then convert the image to grayscale then show the ouptut thru VGA in a monitor. How can I do this? I mean, can I store the converted image to SDRAM then from there can I output it to VGA? Help please. I'm not familiar how SDRAM works in the DE1.

Altera_Forum · ‎05-11-2016

That is a feasible way of doing. You may want to have a look at the VIP-Suite[1] (Video-Image-Processing-Suite) for first try.

If you have precise questions do not hesitate to ask.

[1] https://www.altera.com/products/intellectual-property/ip/dsp/m-alt-vipsuite.html#overview

Altera_Forum · ‎05-11-2016

I tired to edit the DE1_D5M code given by altera. From there, I wanted to convert the RGB image to grayscale from a separate module and then output it to VGA.

Part of my top module is here:


assign DISP_R = SW ? GrayscaleR  : VGA_out_R;
assign DISP_G = SW ? GrayscaleG  : VGA_out_G;
assign DISP_B = SW ? GrayscaleB  : VGA_out_B;                                
// RGB
assign  VGA_out_R  = Read_DATA2;
assign  VGA_out_G  = {Read_DATA1,Read_DATA2};
assign  VGA_out_B  = Read_DATA1;
// Gray
assign  GrayscaleR  = VGA_out_G;
assign  GrayscaleG  = VGA_out_G;
assign  GrayscaleB  = VGA_out_G;
assign    VGA_CTRL_CLK=    rClk;
assign    VGA_CLK        =    ~rClk;
always@(posedge CLOCK_50)    rClk    <=    rClk+1;
wire        oVGA_R;
wire        oVGA_G;
wire        oVGA_B;
assign    VGA_R        =    oVGA_R;
assign    VGA_G        =    oVGA_G;
assign    VGA_B        =    oVGA_B;
always@(posedge CCD_PIXCLK)
begin
    rCCD_DATA    <=    CCD_DATA;
    rCCD_LVAL    <=    CCD_LVAL;
    rCCD_FVAL    <=    CCD_FVAL;
end
VGA_Controller        u1    (    //    Host Side
                            .oRequest(Read),
                            .iRed(DISP_R),
                            .iGreen(DISP_G,
                            .iBlue(DISP_B),
                            //    VGA Side
                            .oVGA_R(VGA_R),
                            .oVGA_G(VGA_G),
                            .oVGA_B(VGA_B),
                            .oVGA_H_SYNC(VGA_HS),
                            .oVGA_V_SYNC(VGA_VS),
                            //    Control Signal
                            .iCLK(VGA_CTRL_CLK),
                            .iRST_N(DLY_RST_2)
                       &nbsp;);

Altera_Forum · ‎05-11-2016

and what is your concrete problem within that task?

Altera_Forum · ‎05-11-2016

I want to clarify that in the VGA_Controller macrofunction, the output that will be shown will be based on the VGA side?