View Full Version : Call for Mac testers (QSI 500 cameras)

2011-May-10, 08:16 PM
I'm looking for a few individuals to test out a new Mac application I've
created for controlling QSI 500-series cameras. *If interested, please
read the following and contact me off-list (joe@shimkus.com).

I own a 583ws and so have been able to do testing with that camera and,
while I welcome individuals who also have that camera, I'm particularly
interested in those who have different models including one-shot color
models in order to find any holes in support for models other than the

Please be aware that this application uses a couple of APIs introduced by
Apple with the 10.6 (Snow Leopard) release of Mac OS X. *As such, you'll
need to be running Snow Leopard in order to use this application.
Further, you will be expected to maintain discretion concerning the
application and most definitely not share it with anyone.

The following is a list of the features (or limitations, depending on POV
:-) of the application (note that features are enabled based on whether or
not the camera supports them):

- High/low gain selection
- High/normal antiblooming selection
- Binning value selection (in both dimensions if the camera allows)
- Pre-exposure flushing control
- Electronic/mechanical shutter selection
- LED and sound status control
- Cooler control including fan speed
- Graphical subframe selection*
- Graphical focusing* including FWHM and HFR graphs
*- FWHM is calculated across the entire exposure using the relationship
*****FWHM and standard deviation
*- HFR is initially calculated using the geometric center of the exposure;
*****click anywhere to set that point as the HFR locus
*- The top and bottom of the graph display areas represent the maximum and
*****minimum, respectively, of the results of the calculations. *New
maxima or minima will scale the existing graph for the new range.
- Click-drag-release, for both subframe and focus, selects region of
- Both subframe and focus provide a 'gain' slider which multiplies pixel
***(capped at 64K) to ease identification of region of interest. *For
focus, you will want to return this slider to its minimum setting after
identifying the region of interest (the pixels are multiplied before the
FWHM/HFR algorithms see them).
- Queuing of an arbitrary number of exposure requests
*- Exposure processing is started automatically when an exposure is added
*****the queue.
- Ability to specify an exposure set via begin and end filters. *An
exposure set
***will submit individual exposures for all filters in the specified
*- The iteration over the specified filters utilizes modulo (clock)
*****For example, with 5 filters, a beginning filter of 4 and an ending
filter of 1, exposures will be queued for filters 4, 5 & 1 (in that order).
- A count specifier which queues the specified number of exposure sets.
***Using the above filter example and a count of 3 would submit 3 sets of
filters 4, 5 & 1 ([4,5,1], [4,5,1], [4,5,1]).
- A 'first filter' exposure duration multiplier. *Useful, for example, if
***want a longer exposure for L in an LRGB filter set.
- For color cameras, an option to enable/disable demosaic processing.
*- If disabled, the raw data from the camera is stored.
*- If enabled, the data is processed using a bilinear algorithm.
- Images are stored in TIFF format only (at least for now).

* Note that the exposure duration setting controls the length of exposures
*for both subframe selection and focusing.