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FloatImg
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cumul image can be converted to gray

This commit is contained in:
tth 2019-09-02 11:47:51 +02:00
parent cc6dd330ed
commit f0c704a818
1 changed files with 10 additions and 3 deletions
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13
v4l2/grabvidseq.c
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@ -71,6 +71,7 @@ if (verbosity) {
}
puts("options :");
puts("\t-d /dev/?\tselect video device");
puts("\t-g\t\tconvert to gray");
puts("\t-n NNN\t\thow many frames ?");
puts("\t-O ./\t\tset Output dir");
puts("\t-o bla\t\tset output filename");
@ -103,6 +104,7 @@ int opt;
int width = 640;
int height = 480;
double t_final;
int to_gray = 0;
char *dest_dir = "."; /* no trailing slash */
char *outfile = "out.pnm";
@ -110,9 +112,10 @@ char *outfile = "out.pnm";
FloatImg grab, cumul;
#endif
while ((opt = getopt(argc, argv, "d:hn:o:O:p:s:v")) != -1) {
while ((opt = getopt(argc, argv, "d:ghn:o:O:p:s:v")) != -1) {
switch(opt) {
case 'd': dev_name = optarg; break;
case 'g': to_gray = 1; break;
case 'h': help(0); break;
case 'n': nbre_capt = atoi(optarg); break;
case 'O': dest_dir = optarg; break;
@ -143,6 +146,7 @@ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
xioctl(fd, VIDIOC_S_FMT, &fmt);
if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) {
/* are others formats usable ? */
printf("Libv4l didn't accept RGB24 format. Can't proceed.\n");
exit(EXIT_FAILURE);
}
@ -197,11 +201,10 @@ foo = fimg_create(&cumul,
FIMG_TYPE_RGB);
fimg_clear(&cumul);
cumul.fval = 255.0;
cumul.count = 0;
#endif
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
xioctl(fd, VIDIOC_STREAMON, &type);
@ -282,6 +285,10 @@ fprintf(stderr, "pid %d : elapsed time %g s\n", getpid(), t_final);
fprintf(stderr, "\t%.2f fps\n", (double)nbre_capt / t_final);
#if SAVE_AS_CUMUL
if (to_gray) {
if (verbosity) fputs("converting to gray\n", stderr);
foo = fimg_to_gray(&cumul);
}
// save cumul to file
foo = fimg_save_as_pnm(&cumul, outfile, 0);
// free buffers