Sebastien, Sebastian 1) Monochrome images - you may set monochrome mode (selection list in camvc or COLOR=0 in parsedit.pho or just from the PHP script. It will still appear as "color JPEG", but color components will be zeroed completely so compressed nicely. 2) "Raw" - I would still recommend using JPEG with quality=100%. The compression error will be less than 1 count, but you'll get the normal fps - real raw data from the camera is made fro debugging mostly, it requires each pixel to be read from the FPGA by software - in compressed mode data is transferred to the system memory over DMA 3) Using camvc.php to control the camera - yes, it is possible but I would recommend using custom php script (you may use snapfull.php as an example) 4) Histograms - you may use PHP code to read histogram arrays from the camera, there is support in the PHP extension: http://elphel.cvs.sourceforge.net/viewvc/elphel/elphel353-8.0/apps/php-5.2.9/ext/elphel/elphel_php.c?view=markup:
1245 /** 1246 * @brief return histograms for selected frame (absolute frame number) as a plain integer array 1247 * some derivative histograms may be calculated if they do not exist yet 1248 * (raw FPGA data should be read from IRQ/tasklet - no attemt to re-read FPGA here) 1249 * @param frame - absolute frame number 1250 * @param needed - bitmask specifying what tables to include in the output array, each group is in the order r(0),g(1),gb(2),b(3) 1251 * - bits 0..3 - raw histograms from the FPGA (only if they are already in the cache) 1252 * - bits 4..7 - cumulative histograms (sum of raw ones) - normally called from applications 1253 * - bits 8..11 - calculate percentiles (reverse cumulative histograms) - normally called from applications 1254 * @return NULL - error, otherwise a string with (struct histogram_stuct_t) 1255 * 1256 */ 1257 1258 PHP_FUNCTION(elphel_histogram_get) 1259 { 1260 struct histogram_stuct_t * frame_histogram_structure; 1261 long frame=-1; 1262 long needed=0xfff; 1263 long index; 1264 int i; 1265 if ( zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|ll", &needed, &frame) == FAILURE) { 1266 php_error_docref(NULL TSRMLS_CC, E_ERROR, "Wrong index"); 1267 RETURN_NULL (); 1268 } (all php functions are listed in the beginning of the file) For each function format is specified in a line like if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|ll", &needed, &frame) == FAILURE) { "|ll" means that there are no required parameters (nothing before "|"), so you can call $histogram=elphel_histogram_get(); and two optional long parameters that will be assigned to "needed" and "frame" variables Note, there is no automatic conversion of the parameter types, they should be numbers, not string. You may ensure that the strings are converted by adding 0 to them, i.e $numeric_value=$_GET('url_value')+0; to convert url parameter (...&url_value=1234&..) to integer value 1234 Andrey
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