Manipulating hash records using OpenScrape

Hash Records are created from specific Image records, so in order to create a Hash record, you must first have collected the associated Image record (see section {4.9}).

Figure 4.8‑23 OpenScrape Create Hash Record buttons

The “Create Hash” buttons on the Table Map Editor window are used to create new Hash records. Button “0” creates Hash records in the Hash0 group, button “1” creates Hash records in the Hash1 group, and so on. These buttons are only available if an Image record has been selected in the tree display on the Table Map Editor window.

Note: Only one Hash record can exist in a Table Map in each hash group for any given Image record. Otherwise, there would be collisions, and the screen scraper engine would not know which Hash record was the correct match. In the “Create Hash Record buttons” screenshot above, Hash records for group 0 and 2 have already been created for the selected Image record, so those buttons are grayed out.

To create a new Hash records:

1. Select an Image record

2. Click the “Create Hash” button for the hash group that you want to create this Hash record in.

The following window will then appear to confirm the addition of the new Hash record:

Figure 4.8‑24 OpenScrape New Hash record confirmation

When you add a new Hash record with the “Create Hash” buttons, OpenScrape will calculate the hash value for you and add it to the record. (This is new behavior in 2.0; previous versions stored a zero hash value on new record creation) However, sometimes you may need to change that stored hash value, if for example, you replace the underlying Image record, or you change the number or location of the related Hash Points. If one or more hash values need to be updated, use the “Update Hashes” option on the Edit manu on the Main window, and the hash values on all Hash records will be re-calculated.

Дата добавления: 2015-07-20