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IRIX 6.2 Applications 1996 August
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Silicon_Graphics_812-0542-002.iso
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imgtools.idb
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relnotes
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imgtools
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ch4.z
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ch4
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1996-08-03
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- 1 -
4. _B_u_g__F_i_x_e_s
This chapter lists bugs fixed in release 2.2 of the IRIS
ImageVision Tools.
4.1 _I_m_a_g_e__V_i_e_w__A_u_t_o_S_c_a_l_e
Image View automatically scales images (by default) to the
range 0-255. This automatic scaling can be turned off using
the AutoScale toggle (per view) or AutoScale mode (new
views). The scale min/max values did not propagate
correctly if hardware acceleration was disabled. This
problem has been fixed.
4.2 _I_m_a_g_e__V_i_e_w__L_U_T__E_d_i_t_o_r
Image View lookup table (LUT) editor was difficult to use
when manipulating images with ilBit data type or whose
min/max range was much smaller than the range of the data
type. This problem has been fixed.
4.3 _I_m_a_g_e__V_i_e_w__R_G_B__M_o_d_e__a_n_d__D_o_u_b_l_e__B_u_f_f_e_r__T_o_g_g_l_e
The GUI toolkit used by Image View gets confused when the
RGB mode and/or Double Buffer mode is toggled and then the
window is resized. This causes problems with the colormap.
To workaround this problem, iconify and reopen the window.
4.4 _I_m_a_g_e__W_o_r_k_s__E_n_h_a_n_c_e_m_e_n_t
Image Works has several enhancement operations such as
contrast and brightness. These operations did not properly
work on RealityEngine if IL hardware acceleration was on
(default). This problem has been fixed.
4.5 _I_m_a_g_e__W_o_r_k_s__F_i_n_d__E_d_g_e_s
Image Works has several edge operators under the Effects
menu. All were all broken, except for Roberts. They now
work properly.
4.6 '_i_m_g_c_o_p_y -_C_n_e_g_a_t_i_v_e _m_i_n_b_l_a_c_k_i_m_a_g_e _m_i_n_w_h_i_t_e_i_m_a_g_e'
_n_e_g_a_t_e_d _i_m_a_g_e _o_n _R_E
When using imgcopy to covert a min-black image to min-white
color model on the RE with hardware acceleration enabled the
resulting image was negated. This problem has been fixed.
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4.7 _i_m_g_c_o_p_y -_h -_t_u_c_h_a_r _p_r_o_d_u_c_e_d _g_a_r_b_a_g_e _o_u_t_p_u_t _o_n _f_l_o_a_t
_i_n_p_u_t
Coverting float data to unsigned char with the -h option
could produce garbage results. This problem has been fixed.
4.8 _T_I_F_F__F_o_r_m_a_t__I_n_c_o_m_p_a_t_i_b_i_l_i_t_i_e_s__w_i_t_h__X_V__3_._0
Because of some last minute changes in the TIFF 6.0
specification many TIFF readers and writers contained
various format bugs. The imgtools in IRIX 5.2 and XV 3.0 (a
publically available image display and manipulation tool)
both contained mutually incompatible errors of this nature.
The imgtools have been updated to adhere to the official
TIFF 6.0 specification. Specifically, the imgtools were
writing the TIFF SampleFormat tag with values indicating
undefined format (4). The imgtools now write the
SampleFormat tag with values indicating unsigned integer
format (1). XV 3.0 uses a version of the TIFF library that
incorrectly complains about this SampleTag format. If
necessary, XV 2.21 can be used which ignores any tags it
doesn't understand. The new release of XV, version 3.10, is
immanent at this writing and may fix this problem.